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____ [38]
3 years ago
6

Sunlight strikes a solar panel, which is then used to power the lights in a

Physics
2 answers:
Stells [14]3 years ago
7 0

Answer:

B

Explanation:

Sunlight comes in the form of light energy. Upon striking the solar panels, it converts the light energy into electrical energy so as to run throughout the circuits. Then since it's used to power light, the electrical energy will be converted back into light energy

faltersainse [42]3 years ago
3 0

Answer: Option B (Light energy to electric energy to light energy)

Explanation: First, the radiation that comes from the sun, and this radiation (in the form of light and heat) is absorbed by the panel.

Now, a thermal panel absorbs light, so the initial step is light energy.

Now the panel transforms that light energy into something that can be stored, like the chemical energy that goes in a battery or the electrical energy that runs in a house, in this case, the light energy is directly transformed into the electrical energy that runs in the house, and that electrical energy is used to power the lights in the house, so it transforms into light energy.

Then the correct option is B

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A car, travelling at a speed of 30 m/s in a straight line, brakes and decelerates at a uniform rate of 2 m/s2. How much further
AURORKA [14]

Answer:

You are finding acceleration, so it would be 15 m/s2

Explanation:

30 divided by 2

3 0
3 years ago
A horizontal pipe has varying cross-section, with one section having a diameter of 5.5
bekas [8.4K]

Answer:

  1. 3 is diameater

Explanation:

2.0 is radius

5 0
2 years ago
(m = 4.0 kg) the cockroach rides on the rim (at radius R) of a disk (M = 6.0 kg) that turns about its center like a merry-go-rou
kvasek [131]

Answer:

ω' = 2.5 rad/s

Explanation:

mass of cockroach, m = 4 kg

mass of disk, M = 6 kg

Radius of disc= R

initial angular velocity, ω = 2 rad/s

Let the final angular velocity is ω'

As no external torque is applied, so the angular momentum is constant.

Angular momentum = Moment of inertia x angular velocity

I ω = I' ω'

\frac{1}{2}\left ( M+m \right )R^{2}\times {2} = \left (\frac{1}{2}MR^{2}+m(0.5R)^{2})  \right )\omega '

10R^{2} = 4R^{2}\omega '

ω' = 2.5 rad/s

5 0
4 years ago
Let’s take the case of the 4-kg block with an initial velocity of 10 m/s that is colliding with a 6-kg block that is stationary.
Aleksandr [31]

Answer:

6kg ise yes...............

8 0
2 years ago
Read 2 more answers
16. A 7500 kg 18-wheeler traveling at 20 m/s exits onto the runaway truck ramp on the freeway.
miskamm [114]

Answer:

<em>765,000 Joule</em>

Explanation:

<u>Principle of Conservation of Energy </u>

The total energy in an isolated system cannot be created or destroyed, but transformed. Moving objects have kinetic energy, objects placed in some height above a reference level have gravitational potential energy. When they change their motion variables, one energy converts into the other, but if the numbers don't fit, we know there was some other type of energy acting into the system. The most common reason for energy 'losses' is the thermal energy, produced when objects move in rough surfaces or take friction from the air.

The 7,500 kg truck is originally traveling at 20 m/s to a certain height we'll set to 0. Thus, its total energy is  

\displaystyle E_1=\frac{mv^2}{2}

\displaystyle E_1=\frac{7,500\ 20^2}{2}

E_1=1,500,000\ Joule

When it comes to a stop, its speed is 0 and its height is 10 m higher than before. It means all the kinetic energy was transformed into other types of energy. The gravitational potential energy is

U=mgh=(7,500)(9.8)(10)=735,000\ Joule

Since this number is not equal to the previous value of the energy, the difference is due to thermal energy dissipated by friction

E_t=1,500,000\ Joule-735,000\ Joule=765,000\ Joule

7 0
3 years ago
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