solar radiation can be absorbed by the earth's surface or reflected back into space. the ratio of reflected radiation to absorbed radiation is known as albedo. which of the following surfaces has the lowest albedo?

Answer: - 0.75 m

Explanation: The displacement will be the sum of the slope of the graph within the given time. From time 8s to 16s, the slope m will be; Slope = (15 - 6) / (16 - 8) Slope = 9 / 8 From time 16s to 24s Slope = (15 - 0) / ( 16 - 2 Slope = -15 / 8 Displacement = 9/8 - 15/8 Displacement = -6/8

Displacement = - 0.75 m

Answer:

True

Explanation:

Velocity is a vector quantity, which means that it carries both magnitude and direction. Hence when direction of a particle changes, although magnitude (speed) may remain same, it's velocity changes due to direction change. For ex. A particle is m... A particle is moving along x axis with speed 1m/s, it's velocity will be represented as 1i (i represents unit vector along x)

But if it now starts moving along y axis, it's velocity is 1j (j represents unit vector along y axis). Hence velocity changes with direction.

brainllest pls .

Answer:

Object A

Explanation:

Mass of an object= Volume × denstiy

Object having higher density will have greater mass

Next,

According to second law of Newton

Force= mass× acceleration

Force= mass× change is velocity/ time

For an equal amount of time, if change in velocity is equal then object with higher mass will have higher force. Hence, greater density, greater is mass and larger is the force.

Answer:

if you stretch a spring with k = 2, with a force of 4N, the extension will be 2m. the work done by us here is 4x2=8J. in other words, the energy transferred to the spring is 8J. but, the stored energy in the spring equals 1/2x2x2^2=4J (which is half of the work done by us in stretching it).

Answer:

Power required = 3.5E8 * 9.0E4 = 3.2E13     (watts)

Power supplied = 1.5E3 * .15 * 3600 * 6    (watts / m^2) * A

= 1.5E3* .15 * 3600 * 6 = 4.9E6 * A

A = 3.2 / 4.9 * E7 = 3.2 / 4.9 * 10 = 6.5 km*2    (1 km^2 = 10E6 m^2)

Note:  1 W = 1 J / sec    1 kw = 1000 W

The area needed to satisfy US energy needs using solar cells 6.5 km²

Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.

Power required = 3.5E8 * 9.0E4 = 3.2E13     (watts)

Power supplied = 1.5E3 * .15 * 3600 * 6    (watts / m^2) * A

= 1.5E3* .15 * 3600 * 6 = 4.9E6 * A

A = 3.2 / 4.9 * E7 = 3.2 / 4.9 * 10

= 6.5 km*2  

The area needed to satisfy US energy needs using solar cells 6.5 km².

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Answer:

48

Explanation:

you basically divide 1200 into 25

Answer:

1.62

Explanation:

F = kx

8.5 = 5.25 * x

8.5/5.25 = 1.62

Answer:

Positive I believe... because if you drop it it is negative so picking up a book means positive. thanks for the points though!

Explanation:

Can I have brainliest please? <3

The maximum acceleration of a platform is 92.7 m/s².

What is an oscillation?

Oscillation is the process of any quantity or measure repeatedly varying about its equilibrium value in time. A periodic variation of a substance between two values or around its center value is another definition of oscillation.

We know,

The acceleration amplitude = \(a_{m}\) = ω²\(x_{m}\)

Here,

ω = angular frequency (ω=2\(\pi\)f)

There are 2\(\pi\) radians in one cycle, so we obtain:

\(a_{m}\) = ω²\(x_{m}\) = (2\(\pi\)f)²\(x_{m}\) = (2\(\pi\)(9.90Hz)²(0.024m) = 92.7 m/s².

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From Coulomb's law, the sets of charges of +2 C and -2 C, and +2 C and +2 C are experiencing the strongest forces, both with a magnitude of 36 N.

The strength of the electrostatic force between two charges depends on the magnitudes of the charges and the distance between them, as given by Coulomb's law. The larger the magnitude of the charges and the smaller the distance between them, the stronger the force.

A fundamental characteristic of matter called charge describes how it interacts with magnetic and electric fields. It is commonly measured in coulombs (C), can be positive or negative, and can also be zero.

Protons and electrons are examples of subatomic particles that have electric charge.

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Answer:

The president is permitted to veto specific legislative acts, but Congress has ... and judicial appointments and on the approval for ratification of treaties. ... State shall have the Qualifications requisite for Electors of the most numerous Branch of the State Legislature. ... No Bill of Attainder or ex post facto Law shall be passed.

Explanation:

Answer: nun

Explanation:

Interference is not restricted to only some types of waves; it occurs for all types of waves.

Interference is a phenomenon that occurs when two or more waves meet in space and time. It results in the superposition of the waves, creating a new wave with a different amplitude, phase, and direction. Interference can occur for any type of wave, including electromagnetic waves (such as light and radio waves), sound waves, and water waves. In fact, interference is a fundamental property of wave behavior and is used in many applications, such as noise-canceling headphones, holography, and radio broadcasting. The interference of waves can be either constructive, where the amplitude of the resulting wave is increased, or destructive, where the amplitude of the resulting wave is decreased. The study of wave interference is an important part of physics and has practical applications in many fields.

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This expression gives the burning surface area A of one motor segment in terms of r1, r2, and w.

To find an expression for the burning surface area (A) of one motor segment, considering that both ends and the inner bore of the cylinder burn, we will use the terms r1, r2, and w.

The surface area A can be calculated as the sum of the areas of the two ends and the inner bore. The two ends have circular shapes, while the inner bore has a cylindrical shape.

For the ends, we have two circles with radii r1 and r2. The area of a circle is given by the formula A = πr². So, the total area of the two ends is:

A_ends = πr1² + πr2²

For the inner bore, we have a cylinder with radius r1 and height w. The lateral surface area of a cylinder is given by the formula A = 2πrh. So, the area of the inner bore is:

A_bore = 2πr1w

Now, we can find the total burning surface area A by adding the areas of the two ends and the inner bore:

A = A_ends + A_bore
A = (πr1² + πr2²) + 2πr1w

This expression gives the burning surface area A of one motor segment in terms of r1, r2, and w.

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The speed of sound in the materials starring with the slowest to the fastest are; outer space, air, water, cold spoon and hot spoon.

Sound is a type of energy made by vibrations. These vibrations create sound waves which move through mediums such as air, water, wood, etc. When an object vibrates, it causes movement in the particles of the medium.

So sound wave is a mechanical wave that requires material medium for its propagation.

Sound wave will travel fastest in solids, so arranging material based on how sound travel in them, starting with the slowest;

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Answer:

C. Expenditure

Explanation:

I took the quiz

The first dark fringe is located approximately 7.35 mm from the central maximum on the screen.

The location of the first dark fringe can be found using the formula:

y = (mλD) / d

where y is the distance from the central maximum to the first dark fringe, m is the order of the fringe (m = 1 for the first dark fringe), λ is the wavelength of light, D is the distance from the double-slit to the screen, and d is the slit spacing (which is the sum of the slit width and the distance between the centers of the two slits).

The slit width is given as 0.15 mm = 0.00015 m, and the wavelength of light is 450 nm = 0.00045 m. The distance from the double-slit to the screen is 2.3 m.

To find the slit spacing, we need to know the distance between the centers of the two slits. If the double-slit is a single piece with two slits, the distance between the centers of the slits is usually given as the width of the slits plus the distance between them. If this information is not provided, we can assume that the distance between the centers of the slits is approximately equal to the width of each slit. Therefore, we can estimate the slit spacing as:

d ≈ 2 × 0.00015 m = 0.0003 m

Substituting the values into the formula, we get:

\(y = (1 × 0.00045 m × 2.3 m) / 0.0003 m\)

y ≈ 7.35 m

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Answer:

-2.0 m/s2

Explanation: D

Explanation:

so I think it B hope that I helped you can good lick

Answer:

A generator is a device that converts mechanical energy into electrical energy by rotating a coil of wire in a magnetic field.

Answer:

False

Explanation:

Given: A crate is sliding down an inclined ramp at a constant speed of 0.55 m/s.

To find: whether the given statement is true or false

Solution:

As a crate is sliding down an inclined ramp at a constant speed of 0.55 m/s, net force is equal to 0 and so, the vector sum of all the forces acting on the crate can't point anywhere.

So, the given statement is false.

Here work done by the car against the force of air in each second denotes the power needed to overcome air resistance at that particular speed. The power of engine is 28 kW.

The power of an object denotes the rate of performing the work. It is defined as the work done in unit time. The SI unit of power is Watt (W) which is also called joules per second.

Power = Resistance × Speed of vehicle

Here the air resistance is found to be 700 N. Then,

Power = 700 × 40 = 28000 N m/s = 28 kW

Thus the engine power is 28 kW.

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Answer:

105.6 KJ

Answer

3.7/5

4

hope this will help you friend.

Answer:

dmakqkwnwj fddfgdddwsf

the magnitude of the average force required to stop the sled is 16 times the velocity of the sled in meters per second.

To calculate the magnitude of the average force required to stop the sled, we can use the concept of impulse and momentum. The equation that relates these two concepts is:

FΔt = mΔvwhere F is the force, Δt is the time interval during which the force is applied, m is the mass of the object, and Δv is the change in velocity.Let's assume that the sled was initially moving with a certain velocity v and that you want to bring it to a complete stop.

The final velocity of the sled will be 0 m/s. Since the mass of the child and sled is 32 kg, we can use the following equation to calculate the average force required to stop the sled:

FΔt = mΔvF Δt = (32 kg) (- v)F Δt = -32v

To determine the value of F, we need to know the time interval Δt during which the force is applied. If we assume that it takes 2 seconds to bring the sled to a stop, then:

F (2 s) = -32vF = -16v Newtons

Therefore, the magnitude of the average force required to stop the sled is 16 times the velocity of the sled in meters per second.

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