Physics High School

## Answers

**Answer 1**

The rate at which we **receive **the **information **from a spacecraft traveling at 0.94c is the same as the rate at which it is sending the information, which is 680 Hz.

This is because the **speed of light **is constant, regardless of the speed of the source.

The** speed of light** is an important factor in determining the rate at which information is received from an object traveling at a velocity close to that of light. This is because, according to **Einstein's Theory of Relativity,** the speed of light is the same for all observers in all reference frames. This means that, regardless of the speed of the source, the speed at which light travels is the same.

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## Related Questions

imagine you're in a completely dark room with no windows and you cut a 1- ft2 round hole in the roof. when the sun is high in the sky, about 100 w of solar power enters the hole. on the floor where the light hits, you place a beach ball covered with aluminum foil, with the shiny side out. discuss the illumination in your room compared with that of a 100- w incandescent lightbulb?

### Answers

In the given case,

The **illumination **in the room would be much less compared to that of a 100-w **incandescent **lightbulb.

The **light **entering the completely dark room with no windows through the 1-ft2 round hole would be **diffused**, meaning that it would be spread out instead of concentrated in one spot. Additionally, the light that does enter the room would be **reflected **off the aluminum foil and would not be as **bright **as a direct light source such as an incandescent bulb. Therefore, the overall amount of light entering the room would be significantly less than that of a 100-w incandescent lightbulb.

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a person moving with zero speed throws and catches a point-like object into the air with initial velocity of 10.00 m/s. ignore the air resistance. calculate how high it goes and how long the object is in the air.

### Answers

The object **travels** **5.03 **m and is in the air for 2.03 seconds.

Using the equation: one may determine the object's **height **in the air.

h = v₀²/(2×g)

where g is the **acceleration **brought on by gravity (9.81 m/s²), h is the height, and v0 is the starting **speed**.

After inputting the values, we obtain:

h = (10.00 m/s)²/(2×9.81 m/s²) = 5.03 m

The formula: may be used to determine how long an **object **has been in the air.

t = 2v₀/g

The values are entered, and the result is:

t = 2(10.00 m/s)/(9.81 m/s²) = 2.03 s

As a result, the item travels 5.03 m and flies for a total of** 2.03 seconds** in the **air**.

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given that the node voltages and the reference node have been selected as shown in the circuit, if the source current is 472ma, find the value of the node voltage, . enter your answer in units of volts.

### Answers

When the node voltages and the reference node have been chosen as illustrated in the circuit, the node **voltage** is equal to **-5.06V** if the source current is 472ma.

Is = 66mA

node V1

Is + V1/100 + V1-V2/400 = 0

400(66mA)+4V1+V1-V2 / 400 = 0

5V1 - V2 = - 26.4V

**node** V2

V2-V1/400 + V2/500 + V2-300Ia/200 = 0 and Ia = V2-V1/400

5V25V1 + 4V2 + 10V2 + 3000Ia / 2000 = 0

-5V1 + 19V2 - 3000(V2-V1/400) = 0

-5V1 + 19V2 - 7.5V2 + 7.5V1 = 0

2.5V1 + 11.5V2 = 0

V2 = -2.5/11.5 V1

V2 = -5/23 V1

5V1 - (-5/23) V1 = -26.4

V1 = -5.06V

An electrical circuit's power source exerts pressure known as **voltage** on charged **electrons** (current), causing them to flow through a conducting loop and perform tasks like lighting a lamp.

Voltage is measured in volts and is simply equal to **pressure** (V). The phrase honours Italian physicist Alessandro Volta (1745–1827), who created the voltaic pile, a predecessor to the modern home battery.

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which of the following statements is true? question 9 options: white dwarf stars have a density equal to our sun. a magnitude 7 star would be 100 times brighter than a magnitude 12 star. an arcsecond is equal to 36 degrees it is mostly a star's mass that determines which absorption lines show in its spectrum. knowing only the spectral type of a star is a sufficient amount of information to allow astronomers to determine luminosity.

### Answers

True statement: A magnitude 7 star would be 100 times **brighter** than a magnitude 12 star.

What is absorption line?

If an absorbent substance is put in front of an observer and a source, an absorption line will be visible in the spectrum. A cloud of interstellar gas, a cloud of dust, or the outermost layers of a star might all constitute this substance. A cloud of absorbing substance, like an **interstellar** gas cloud, allows incoming light to pass through it.

(i) The statement becomes : true

Δm = 12 - 7 = 5

thus, B₁ = B₂ × (2.51)² = 100 B₂

(ii) The statement becomes : False

white dwarf have equal to mass of sun, but **volume** equal to earth. So, density is greater.

(iii) The statement becomes : false

parameter needed: size of star and **temperature**.

(iv) The statement becomes : false

1 arc second = 1/3600

(v) The statement becomes : false

temperature of star determines, whose absorption line shows in spectrum.

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The complete question is as follows:

What might be some explanations for Earth's apparent

"luck" in not being hit by more space debris?

### Answers

The International Space Station moves about once a year to get out of the way of dangerous debris. Critical parts of the station can withstand impact of objects as large as 1 cm, according to NASA. The agency didn't specify the size of the Cosmos 1408 fragment that posed a danger.

G = 6.67 E−11 N*m2/kg2, mass of the Earth is 5.98 E 24 kg, mass of the GOES-16 is 5.192 E 3 kg, average Earth-GOES-16 distance is 4.22 E 7 m. If the gravitational force between the Earth and the geostationary satellite GOES-16 is 1165 N, what is the average speed of GOES-16 as it orbits around the Earth?

Group of answer choices

3100 m/s

4300 m/s

2500 m/s

5600 m/s

### Answers

The **speed **of the **satellite **is 3100 m/s

What is the centripetal force?

**Centripetal force** is experienced by objects in a variety of everyday situations, such as a car turning a corner, a rollercoaster going through a loop, or a satellite orbiting a planet. It is also important in many scientific and engineering applications, such as the design of centrifuges and the study of the behavior of charged particles in magnetic fields.

We have to note that;

The gravitational force would be equal to the centripetal force

F = mv^2/r

m = mass of the object

v = speed of the object

r = **distance**

1165 = 5.192 * 10^3 * v^2/4.22 * 10^7

v = √1165 * 4.22 * 10^7/ 5.192 * 10^3

v = 3100 m/s

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Compared to visible radiation, does infrared radiation have longer or shorter wavelengths and higher or lower energy per photon?

### Answers

**Infrared radiation** has longer **wavelengths** and lower **energy** per **photon** compared to **visible radiation**.

The **electromagnetic spectrum's** visible region has wavelengths between 400 and 700 **nanometers**, which correspond to the **hues** **violet**, **blue**, **green**, **yellow**, **orange**, and **red**. As opposed to **visible light**, **infrared light** has longer wavelengths, with a range of about 700 nanometers to 1 millimetre or more.

The energy of a photon is directly proportional to its **frequency**, per the **Planck-Einstein connection** (or inversely proportional to its wavelength). As a result, infrared radiation has lower frequencies and less energy per photon than visible radiation due to its longer wavelengths.

In conclusion, infrared radiation has longer wavelengths and lower energy per photon than visible radiation.

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While the cart is moving along an aisle, it comes in contact with a smear of margarine that had recently been dropped on the floor. Suddenly the friction force is reduced from -40.0 newtons to -20.0 newtons. What is the net force on the cart if the “pushing force” remains at 40.0 newtons? Does the grocery cart move at constant velocity over the spilled margarine?

### Answers

**Answer:**

-.5N

**Explanation:**

The equation F=mu Fn will help here.

-20N= 40N x Fn

-.5 = Fn

which of the following objects has the largest momentum? (a) a bullet fired from a rifle (b) a football quarterback running at top speed (c) a horse walking at about 2 miles/hour (d) an elephant standing still

### Answers

Of the four objects listed, **the bullet fired from a rifle** will have the largest momentum. This is because the bullet has a relatively small mass but a very** high velocity**, which gives it a large amount of **momentum**.

What is momentum?

**Momentum** is a **physical quantity** that describes the motion of an object. It is a** measure of an object's resistance **to changes in its velocity and is related to the mass of the object and its velocity. Momentum is a **vector quantity**, meaning it has both magnitude and direction, and is defined as the product of an object's mass and velocity.

Explanation & Formula:

The object with the** largest momentum** depends on the** mass of the object and its velocity**. Momentum is defined as the product of an object's mass and velocity, and is denoted by the symbol "p". Mathematically, it can be expressed as:

p = m * v

where

p = momentum

m = mass of the object

v = velocity of the object

Of the four objects listed, the **bullet fired from a rifle** will have the **largest momentum**. This is because the bullet has a relatively small mass but a very high velocity, which gives it a large amount of momentum. The other objects, such as the football quarterback running at top speed, the horse walking at 2 miles/hour, and the elephant standing still, will have** lower velocities** and therefore **lower momenta.**

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in a location where the train tracks run parallel to a road, a high speed train traveling at 60 m/s passes a car traveling at 20 m/s. how long does it take for the train to be 360 m ahead of the car?

### Answers

The time required by the **train **to be 360m ahead of the **car **on the road is found to be 9 seconds.

The **train track **runs **parallel **to a road, a high speed train is travelling on the track with a speed of 60m/s and a **car **passes by with a speed of 20m/s.

Now, the time required by the train to be 360m ahead of the car is given by the relation,

**Relative Speed** = Distance/time

Relative speed = speed of train - speed of car

Relative speed = 60m/s - 20m/s

Relative speed = 40m/s.

Distance = 360m.

Now, putting all the values,

Time = Distance/relative speed

Time = 360/40

Time = 9 seconds,

So, the **time **required by the **train **to go ahead is 9seconds.

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Determine the time taken when, distance is 7150 km and speed is 780 km/hr

### Answers

The required **time** taken to cover the given distance with specified **speed** is calculated to be 0.109 hr or 392.4 sec.

The **distance** travelled is given as 7150 km.

The speed is given as 780 km/hr.

The **relationship** between time, speed, and distance is known as,

Distance d = speed s/time t

d = s/t

Entering the values into the above **equation**, by making 't' as subject,

t = s/d = 780/7150 = 0.109 hr

Let us convert hours into **seconds**,

⇒ 0.109 hr = 0.109(60×60) = 392.4 sec

Thus, the time taken to cover the given distance with specified speed is calculated to be 0.109 hr or 392.4 sec.

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if the cost of electrical energy is $0.075 per kilowatt-hour, how much does it cost to operate the light for an hour?

### Answers

$0.075 is the **cost to operate** the light for an hour.

As per the given information,

The cost of electrical energy = $0.075 per kilowatt-hour

Kilowatt-hours, or kWh, are the measure of electrical energy. They are calculated by **multiplying** the amount of power used (measured in kW) by the number of hours during which it is used. The total cost of energy is calculated by multiplying that figure by the price per kWh.

If we assume that the light uses 1 **kilowatt-hour** of electrical energy every hour of use, we can compute the **cost of running** the light for an hour as follows:

Cost = Energy used x Cost per kilowatt-hour

Cost = 1 kilowatt-hour x $0.075 per kilowatt-hour

Cost = $0.075

Therefore, it would cost $0.075 to operate the light for one hour. If the light **consumes **more or less than 1 kilowatt-hour per hour, then the cost would be proportionally higher or lower.

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a boater traveling at (4.50 a) m/s relative to the water, aims the bow of the boat to go straight across a river. if the river is (54.0 b) m wide and the current in the river is 3.50 m/s, how far downstream will the boat land on the other side of the river? calculate the answer in meters (m) and rounded to three significant figures.

### Answers

The **boat **will land about 185 meters **downstream **on the other side of the river.

**Distance **= velocity × time

d = v_r × t

where v_r is the **velocity **of the river and t is the time it takes for the boat to cross the river.

Use the fact that the **distance** the boat travels in the x-direction is equal to the **width **of the river,

x = 54.0 b

The **time **it takes for the boat to cross the river is,

t = x / v_b

where v_b is the velocity of the boat relative to the water.

To find v_b, use the **Pythagorean theorem**:

v_b^2 = v_w^2 + v_c^2

where v_w is the velocity of the **boat **with respect to the ground and v_c is the **velocity **of the current.

v_b^2 = (4.50 a)^2 + (3.50)^2

v_b = 5.71 a

Substituting the values for x, v_b, and v_r into the equation for d,

d = (3.50 m/s) * (54.0 b) / (5.71 a)

d ≈ 185 b/a meters

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a bat makes a squeak of frequency 8,000 hz. if the sound travels at 343 m/s, what is the wavelength of the sound wave?

### Answers

The wavelength of the sound wave made by the bat will be 0.042875 meters. The **Wavelength** of a sound wave can be calculated using the following formula:

wavelength = velocity of sound / frequency

Where the **velocity of sound** is the speed at which the wave travels through a medium, and frequency is the number of complete cycles of the wave that occur in one **second**.

The **velocity** of sound is given in meters per second, and the frequency is given in Hertz.

Plugging in the values, we get:

wavelength = 343 m/s / 8,000 Hz

Simplifying this expression, we get:

wavelength = 0.042875 m

This is the distance between two consecutive peaks or troughs of the sound wave(i.e. **Wavelength**).

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What are the high and low tides called?

### Answers

The tides with the biggest difference between **high and low water** are called springs and those with the smallest are called neaps. Spring tides happen just after every full and new moon, when the sun, moon and earth are in line.

What are Tides ?

When the tide is low, the **Moon** faces the Earth at a straight angle to the Sun, which causes the Moon and Sun's gravitational pull to be antagonistic. These tides are known as neap tides, which are low tides or tides that are lower than usual.

People frequently refer to abnormally high tides with the non-scientific term "**king tide**." Tides are long-period waves that travel around the world as the ocean is "tugged" back and forth by the sun's and the moon's gravitational pulls when these bodies interact with the Earth in their monthly and yearly orbits.

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an object sits on a frictionless surface. a 16-n force is applied to the object, and it accelerates at 2.0 m/s2. what is the mass of the object?

### Answers

The **mass** of the object is 8 kg.

Due to inherent inertia, an object moving over a frictionless surface will keep moving at the same speed. Since an object's inertia is reliant on its mass, as **mass** grows, so does the object's resistance to changing velocity. The relationship between force and **acceleration** is described by Newton's second law of motion. They are equivalent in size. The acceleration of an object rises by the same amount as the force being applied to it. Force is simply defined as **mass** times **acceleration**.

F=m*a

m=F/m

=16/ 2

=8 kg

The weight of the object is 8 kg.

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If the wavelength is 7.52m and the speed is 8.99m/s for a series of waves, what is the frequency of the waves?

### Answers

**Answer: 1.195479Hz**

**I think**

two blocks of unequal mass (ma < mb) are connected by a string (string 2). the blocks are placed on a frictionless table and pulled by another string (string 1) attached to block a such that both blocks move together faster and faster. assume that both strings are inextensible and massless. is the magnitude of the acceleration of block a greater than, less than, or equal to the magnitude of the acceleration of block b?

### Answers

The **magnitude** of the **acceleration **of block a is actually equal to the magnitude of the acceleration of block b sice both blocks (even with different **masses**) are pulled by the same **force**, meaning same acceleration.

**Force **is created when an object is accelerating. When a mass is accelerating, it is** changing speeds** or **directions**. No wonder in physics, force is equal to **mass** times **acceleration** (F = ma).

When an object is at rest, there's no force acting on it, so the force would be zero. This is the same case with objects moving at a constant speed in the same direction; there is no force acting on those objects.

Since the blocks are moving in the same direction, and there's only one pulling force acting on both blocks, the **magnitudes **of the acceleration of both blocks have to be the same. For instance, all objects on Earth (even with different masses) experience the same acceleration of Earth's gravity.

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A car starts from rest on a curve with a radius of 130m and tangential acceleration of 1.3m/s2 .Through what angle will the car have traveled when the magnitude of its total acceleration is 2.2m/s2 ?

### Answers

A **car **starts to rest on a bend with a **radius** of 130 m and a tangential acceleration of 1.3. When the total acceleration of the car is 2.0m/s2, the car will move through an **angle **of** 22.5°.**

**The turning radius** is the distance required by the car to turn or turn around. Because of this, calculations are made from the moment the car makes a turn until it rotates in a semicircle or** 180 degrees**. Then, the distance from the diameter will be measured and used as the turning radius of the vehicle.

**Radial acceleration **(a') = √2² - √1.3²

Radial acceleration (a') = √4 - √1.69

Radial acceleration (a') = √2.31

Radial acceleration (a') = 1.5 m/s²

v = [tex]\sqrt{a' . r}[/tex]

v = [tex]\sqrt{1.5 x 130}[/tex]

v = [tex]\sqrt{195}[/tex]

v = 14 m/s

Now,

d = v²/2a'

d = 14²/2(1.5)

d = 154/3

d = 51.3 m

Expression for **circle central **angular is:

θ = d/r

θ = 51.3/130

θ = 0.394 rad

**θ = 22.5°**

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car rounds an unbanked curve of radius 66 m. if the coefficient of static friction between the road and car is 0.66, what is the maximum speed (in m/s) at which the car can traverse the curve without slipping? m/s

### Answers

The maximum speed at which the car can **traverse **the curve without slipping is approximately **21 m/s**

The maximum speed at which a car can traverse an **unbanked **curve without slipping is determined by the maximum **frictional force **available to **counteract **the centripetal force acting on the car.

The **centripetal force** is given by the equation:

*F = m * *[tex]v^2[/tex]* / r*

where m is the **mass** of the car, v is its **speed**, and r is the **radius **of the curve. The frictional force is given by:

F_friction = μ * N

where μ is the **coefficient **of static friction and N is the normal force acting on the car, equal to its weight.

Setting the two **forces **equal, and substituting the expression for N, we have:

μ * m * g = m * [tex]v^2[/tex] / r

Solving for v, we get:

v = [tex]\sqrt{ }[/tex](μ * g * r)

Plugging in the given values, we get:

v = sqrt(0.66 * 9.8 * 66) = sqrt(439.48) = 20.99 m/s

So the maximum speed at which the car can traverse the **curve **without slipping is approximately 21 m/s.

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An astronaut drops two pieces of paper from the door of a lunar landing module. one piece of paper is crumpled, and the other piece is folded into an airplane. why do the two pieces of paper land on the moon’s surface at the same time?

### Answers

The two pieces of **paper **land on the **moon's surface **at the same time because they are both subject to the same gravitational force.

What controls motion on the moon?

The force of gravity is determined by the mass of the object and the distance between it and the center of the **celestial body**. On the moon, the force of **gravity **is weaker than it is on Earth, but it is still strong enough to cause objects to fall toward the surface.

The shape of the paper, whether crumpled or folded into an **airplane**, has no effect on the force of gravity acting on it. In the absence of **air resistance**, all objects, regardless of their mass, shape, or size, will fall at the same rate in a vacuum.

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LaCie kicks a football from the ground level at a velocity of 13.9 m/s and at angle of 25 degrees to the ground. You have determined that the football would travel 15.1 m before landing. How would this value change if the football was kicked at an angle of 35 degrees? Complete all equations without rounding and then round to the nearest tenth at the end

### Answers

The ball will travel more **distance** when projected or kicked at an angle of 35 degrees.

**What is the range of projectile?**

The range of the **projectile** or the **horizontal distance** traveled by the ball is calculated by applying the following kinematic equation as shown below.

R = ( u² sin (2θ ) ) / g

where;

u is the initial velocity of the ballg is the acceleration due to gravity

The **horizontal distance** traveled by the ball when projected at 35 degrees is calculated as;

R = ( 13.9² x sin ( 2 x 35 ) ) / ( 9.8 )

R = 18.53 m

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Mr. Green wants to teach his students about an interaction between Earth's biosphere and geosphere. Mr. Green had his students collect soil samples from various areas of the school campus. The students noticed that the upper layer of the soil in the wooded area of the campus was darker than the upper layer of the sandy playing field. Why would there be a difference in color in the upper layer of the two soil samples?

### Answers

The pupils look into the ecology of **gravity **Earth. They research systems and the structure of the system's components in order to comprehend the biosphere.

Why is the soil's topmost layer dark in color?

Due to its **abundance **of humus and minerals, the topmost horizon of soil typically has a dark color. Humus improves soil fertility and gives growing plants **nutrition**. This layer may hold more water and is typically soft and porous.

What factors lead to variations in soil types?

The primary determinants of soil diversity are **temperature **and precipitation. In the soil, **precipitation **removes minerals and salts. These flow down the soil profile with the water. Which plants and other living things live in the soil are also influenced by climate and temperature.

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a 0.140 kg baseball is dropped from rest from a height of 2.2 m above the ground. it rebounds to a height of 1.6 m. what change in the balls momentum occurs

### Answers

The** change in momentum** of the **baseball **is 0.58 kg m/s

To calculate the change in momentum of the baseball, we need to find the** **initial and final momentum of the ball.

The** initial momentum** of the ball can be calculated as follows:

m = mass of the ball = 0.140 kg

v = initial velocity (at rest) = 0 m/s

p = m * v = 0.140 kg * 0 m/s = 0 kg m/s

The** final momentum **of the ball can be calculated after it has rebounded to a height of 1.6 m:

h = height = 1.6 m

g = acceleration due to gravity = 9.8 m/s^2

v = final velocity = √2gh = √2 * 9.8 m/s^2 * 1.6 m = 4.1 m/s

p = m * v = 0.140 kg * 4.1 m/s = 0.58 kg m/s

The change in momentum of the **ball **is equal to the final momentum minus the initial momentum:

Δp = p_final - p_initial = 0.58 kg m/s - 0 kg m/s = 0.58 kg m/s

So the change in momentum of the **baseball **is **0.58 kg m/s.**

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a capacitor and a capacitor are connected in parallel across a 600-v supply line. (a) find the charge on each capacitor and voltage across each. (b) the charged capacitors are disconnected from the line and from each other. they are then reconnected to each other with terminals of unlike sign together. find the final charge on each capacitor and the voltage across each.

### Answers

(a) The charge on any **capacitor **is the same and equal to the product of its capacitance and the voltage across it.

(b) The final charge on each capacitor is the sum of the **initial charges** on both capacitors.

An** electronic **component known as a** capacitor** is a passive device that stores electrical energy in an electric field formed by two conducting plates. The insulating substance, sometimes referred to as a dielectric, that separates the plates determines the capacitance of the capacitor. An electric field is produced when a voltage is placed across the plates, which causes a charge to accumulate on each plate. The voltage across a capacitor **determines** the amount of charge that may be stored there, which is expressed in coulombs. Electrical circuits frequently employ capacitors for functions like filtering, energy storage, and signal coupling. They can be used in both AC and DC applications and come in a range of sizes, shapes, and capacitance levels. Capacitors are typically utilised to store electrical** energy**.

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a disk is free to rotate about an axis perpendicular to the disk through its center. if the disk starts from rest and accelerates uniformly at the rate of 3 radians/s2 for 4 s, its angular displacement during this time is

### Answers

If the **disk** starts from rest and accelerates uniformly at a rate of 3 radians/s² for 4 s, its angular displacement during this time is** 24 radians.**

**Circular motion** is the motion of an object in a circular path around a center point. **Angular speed** is the angular frequency of an object and its axis of rotation.

The equation in Uniform Circular Motion is:

θ = ω₀ t + 1/2 α t²

Information:

ω₀: Initial angular velocity (rad/s)

α: angular acceleration (rad/s²)

θ: angular position (rad)

t: time (s)

The** disk **starts from rest, so

θ = ω₀ t + 1/2 α t²

θ = 0(4) + ½ (3)(4)²

θ = 0 + 24

**θ = 24 radians**

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What is the next challenge facing Edison to make electrical lighting possible?

### Answers

Finding a suitable material for the **filament **of an incandescent light bulb was one of Thomas Edison's biggest obstacles.

**What is filament ?**

The source of light in an incandescent light bulb is the **filament**, which is a wire-like structure. It is often constructed of **tungsten** or another material with a high melting point and good thermal **shock resistance**. When an electric current is sent through the filament, which is commonly twisted into a coil or loop shape, the filament heats up and starts to generate light.

**Thermal radiation **causes the filament to produce light. This is the result of the filament's temperature-related **electromagnetic radiation** output. The filament starts to emit infrared radiation and visible light as it warms up.

The filament's temperature and the kind of material it is constructed of affect the** hue of the light** it emits.

A glass bulb that has been evacuated or a bulb that has been filled with an **inert gas**, such as argon or nitrogen, surrounds the filament in an incandescent light bulb. By doing this, you can avoid the filament from **burning** out or **breaking**, which would make the lightbulb unusable.

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To practice Tactics Box 5.2 Identifying Forces. kinetic friction static friction thrust normal force spring force tension The first basic step in solving force and motion problems generally involves identifying all of the forces acting on an object. This tactics box provides a step-by-step method for identifying each force in a problem?

### Answers

The formula is = f / N, where f is the amount of force which opposes motion, N is the normal force, and seems to be the coefficient of friction. The normal is the force used to push one **surface **into another.

What is static force?

Static friction is a force that keeps an object at rest. Static **friction **is defined as the resistance one encounters when trying to move something that is stationary across a surface while actually moving their body or the surface that are **moving **that object across.

What is the tension of normal force?

The normal force acting on an object resting on a **horizontal**, non-accelerating surface has a magnitude equal to a weight of that object: N=mg. Tension, abbreviated T, is the type of force that runs along a **stretched**, flexible connector, like a rope or cable.

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in the current simulation the volume flow rate is 5000l/s or 5m^3/sec. this means that 5 cubic meters of water are passing throgh the pipe in a second. the density of the water is 1000kg/m^3. what is the volume that flows through the pipe in 6 seconds

### Answers

The **volume** that flows through the pipe in 6 seconds is 30 cubic meters, and the mass of the water is 30000 kg.

If 5 cubic meters of **water** pass through the pipe in 1 second, then in 6 **seconds**, the volume that flows through the pipe would be:

5 m^3/s * 6 s = 30 m^3

To find the **mass** of the water that flows through the pipe, we can use the density of water:

mass = density * volume

mass = 1000 kg/m^3 * 30 m^3 = 30000 kg

So, the** volume** that flows through the pipe in 6 seconds is 30** cubic **meters, and the mass of the water is 30000 kg.

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An object that is slowing down can be described as:______.

### Answers

**Answer: an object with much friction**

**Explanation:**

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