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<u>Answer:</u>
Option (a)
<u>Explanation :</u>
A stage hand starts sliding a large piece of stage scenery originally at rest by pulling it horizontally with a force of 176 N.
Hence Force applied 
Force on piece of scenery 
µk = 
= 
=
=0.36
coefficient of static friction is 0.36
Answer:
In a way of energy “1s” subsell contains most energy. because 1 s subsell contains the electrons of K orbital which is nearest from the nucleus. so the order of energy will be 1s>2s>2p> 3s> 3p> 4s> 3d> 4p> 5s> 4d> 5p> 6s> 4f> 5d> 6p> 7s and the increasing order of thair energies will be- 4s <3d<4p<5s<4d<5p<6s<4f.
Answer:
it should be Work = F * d * cos(theta)
Explanation:
Force is mass * acceleration, and displacement is the distance between the starting and ending point.
we need theta because it can be used to calculate work when going up an incline surface. And we tend to use cosine because we are assuming that our motion is primarily in the X direction.
