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Mashcka [7]
3 years ago
6

What does it mean that a form of energy might take more energy to harness than it provides?

Physics
1 answer:
Elden [556K]3 years ago
3 0
Inefficiency is a big struggle when it comes to renewable resources. A form of energy might take more energy to harness than it provides because the energy might dissipate. Energy transformation is never 100% conversion. Some of the energy dissipates in the form of heat. 
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A 17 kg box sitting on a shelf has a potential energy of 350 J. How high is the shelf? Round your answer to the nearest whole nu
Free_Kalibri [48]
Potential energy is mass * gravity * height. (m*g*h).

350 = 17*9.8*h   <--350 is its energy, 17kg is its mass, and 9.8 is gravity's acceleration on the object. We now just need to solve for h.

h = 350/(17 * 9.8) =  2.1 meters, which, when rounded to the nearest whole meter, is 2 meters.

The shelf is 2 meters high.

3 0
3 years ago
Read 2 more answers
Which is written in scientific notation?
zaharov [31]

Answer:

<h2>C</h2>

Explanation:

2.0 × 10^3 is the correct form for writing any term in scientific notation form.

Comment for understanding anything.

7 0
3 years ago
A 4400 W motor is used to do work. If the motor is used for 200 s, how much work could it do? (Power: P = W/t)
guajiro [1.7K]
So if p=w/t
then 4400=(w)(200)
so you would multiply 4440•200 and get 880,000
3 0
4 years ago
How does she explain the activity of uranium when amounts of this element are changed? how does she describe the activity of ura
kifflom [539]

Answer:

What to include in the answer:

Results from edg 2022

Explanation:

Did you include this in your answer?

Chemical compounds are active in direct proportion to the amount of uranium in them.

Activity is not destroyed by physical changes of state or chemical transformations.

Radioactivity is an atomic property of matter.

8 0
2 years ago
Which statement did Niels Bohr make about atoms?
Rasek [7]
I believe it is A, if I am remembering correctly from my last semester class. 
3 0
4 years ago
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