Solar cells convert what type of energy into electrical energy? A. thermal B. electromagnetic C. chemical D. nuclear

Answers

Answer 1

Answer:

Answer : The correct option is, (A) thermal

Explanation :

Solar cell is a type of electrical device or p-n junction that converts the light or thermal energy directly into the electrical energy by using the photovalotic effect.

In the process of the energy conversion first require a material that absorbs the solar energy and raise the electron to the higher energy level and then flow of high energy electron to an external circuit. In this energy conversion, the silicon material is used.

Hence, the solar cells convert thermal energy into electrical energy.

Answer 2

Answer: Solar cells convert solar energy into electrical energy. Here, solar energy can be included in electromagnetic energy as it includes, visible light, EM radiations which can travel through empty space.

In short, Your Answer would be Option B

Hope this helps!

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Potential and kinetic energy 1. An apple falling from a tree
2. A stationary ball on the ground
3. A sleeping dog
4. A boy running across the street
5. A car traveling on the road
6. A stretched rubber band
7. A basketball being thrown
8. A girl biking at the park
9. A leaf lying on the ground
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Answers

Here's how potential and kinetic energy relate to the scenarios you've mentioned:

1. An apple falling from a tree: Kinetic energy increases as it falls, while potential energy decreases.

2. A stationary ball on the ground: No kinetic energy (it's not moving), but it has potential energy due to its position above the ground.

3. A sleeping dog: The dog has potential energy due to its position above the ground, but it's not in motion, so there's no significant kinetic energy.

4. A boy running across the street: The boy has both kinetic and potential energy. His motion represents kinetic energy, and his position above the ground while running represents potential energy.

5. A car traveling on the road: The car has both kinetic energy (due to its motion) and potential energy (due to its position above the road).

6. A stretched rubber band: The stretched rubber band has potential energy stored in its stretched configuration.

7. A basketball being thrown: The basketball has both kinetic energy (while it's in motion) and potential energy (when it's at the highest point of its trajectory).

8. A girl biking at the park: Similar to the boy running, the girl on the bike has both kinetic and potential energy.

9. A leaf lying on the ground: The leaf has potential energy due to its position above the ground, but it has little to no kinetic energy unless it's moving in the wind.

10. A planet revolving around a star: The planet has both kinetic energy (due to its orbital motion) and potential energy (related to its position within the gravitational field of the star).

In general, potential energy is associated with an object's position or state, while kinetic energy is associated with its motion.

Difference between perception and perspective

Answers

perspective is the evaluation or analysis of something, the way we think.
perception is a way of interpreting and understanding something.

Multiples of the fundamental frequency created by plucking a string very quickly, several times in a row is called__________.a.
pitch
c.
scales
b.
overtones
d.
percussion

Answers

Answer:

overtones

Explanation:

List the following items in order of decreasing speed, from greatest to least: (i) A wind-up toy car that moves 0.15 m in 2.5 s. (ii) A soccer ball that rolls 2.3 m in 0.55 s. (iii) A bicycle that travels 0.60 m in 0.075 s. (iv) A cat that runs 8.0 m in 2.0 s. Knight, Randall D., (Professor Emeritus). College Physics (p. 28). Pearson Education. Kindle Edition.

Answers

Answer:

(iii) > (ii) > (iv) > (i)

Explanation:

Part (i):

$\textrm{Speed of the wind-up toy} = \frac{\textrm{distance traveled}}{\textrm{Time taken}}\n\Rightarrow v_1=(0.15\ m)/(2.5\ s)\n\Rightarrow v_1 = 0.06\ m/s$

Part (ii):

$\textrm{Speed of the soccer ball} = \frac{\textrm{distance traveled}}{\textrm{Time taken}}\n\Rightarrow v_2=(2.3\ m)/(0.55\ s)\n\Rightarrow v_2 = 4.18\ m/s$

Part (iii):

$\textrm{Speed of the bicycle} = \frac{\textrm{distance traveled}}{\textrm{Time taken}}\n\Rightarrow v_3=(0.66\ m)/(0.075\ s)\n\Rightarrow v_3 = 8.8\ m/s$

Part (iv):

$\textrm{Speed of the cat} = \frac{\textrm{distance traveled}}{\textrm{Time taken}}\n\Rightarrow v_4=(8.0\ m)/(2.0\ s)\n\Rightarrow v_4 = 4.0\ m/s$

From the above calculations, we have

$v_3>v_2>v_4>v_1$

So, the speed in the parts mentioned arranged in decreasing order as follow:

(iii) > (ii) > (iv) > (i)

A weightless spring is stretched 10 cm by a suspended 1-kg block. If two such springs are used to suspend the block, one spring above the other, to effectively provide one double-length spring, then the total stretch of the double-length spring will be

Answers

Answer:

total stretch of the double-length spring will be 20 cm

Explanation:

given data

length x1 = 10 cm

mass = 1 kg

mass = double = 2 kg

to find out

the total stretch of the double-length spring will be

solution

we can say here spring constant is

k = mg ............1

k is spring constant and m is mass and g is acceleration due to gravity

so for in 1st case and 2nd case with 1 kg mass and 2 kg mass

kx1 = mg .........................2

and

kx2 = 2mg ........................3

x is length

so from equation 2 and 3

$(kx1)/(kx2)= (1mg)/(2mg)$

$(x1)/(x2) = (1)/(2)$

$(10)/(x2) = (1)/(2)$

x2 = 20

so total stretch of the double-length spring will be 20 cm

Suppose the mass of a certain liquid is 35 g. You place it in a beaker that has a mass of 75 g. What is the mass of the liquid? plz help.

Answers

If you are looking for the mass of the liquid with the beaker, you just have to add the beaker mass and liquid mass

35+75= 110 g

Final answer:

The mass of the liquid remains at 35 g regardless of its location or what it's placed inside.

Explanation:

The mass of a liquid is simply the amount of matter it contains, and it does not change regardless of where or in what you place it. So, if the mass of a certain liquid is given as 35 g, this mass value remains unchanged whether you place it in a beaker, cup, or any other container. Therefore, the mass of the liquid in the beaker is still 35 g, and the mass of the beaker doesn't affect it.

Learn more about Mass here:

brainly.com/question/35704156

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