<span>B. Energy is never created nor destroyed.
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Ithoshpere is space sheeld. asthenosphere next sheets of sky
Positive acceleration occurs when an object speeds up.
Explanation:
Acceleration is the rate of change in velocity per unit time:
where 
is the change in velocity while 
is the time interval. From the formula, we can understand that when is positive, so when the object is speeding up, the acceleration is positive; on the contrary, when is negative (so, when the object is slowing down), the acceleration is negative.
A particular atom<span> will have the same number of protons and electrons and most</span>atoms<span> have at least as many neutrons as protons. An </span>element<span> is a substance that is made entirely from one type of </span>atom<span>. For example, the </span>element<span> hydrogen is made from </span>atoms<span> containing just one proton and one electron.
Hope this helps</span>
Answer:
It must be 225 J.
Explanation:
According to
Work done = Force × distance travelled
= 75 × 3
= 225 J
This answer is taken so since no angles are stated in the question.
