Answer:
Please find the answer in the explanation.
Explanation:
Given that the actual speed of the car at the top of the hill is 20.0m/s. What is the reason for this difference in velocity?
Speed is a scalar quantity that is, it has only magnitude but no direction.
While velocity is a vector quantity, that is, it has both magnitude and direction.
If the actual speed of a car is 20 m/s, that is the magnitude of the speed only without direction.
The velocity will therefore be of the same magnitude but with addition of direction. Either west, east or north south.
Answer:
D. provide the most compelling evidence of cause-and-effect relationships.
Explanation:
The engine efficiency is 64.73 %
<u>Explanation:</u>
Given data
To find the engine’s efficiency we have the formula,
Energy input- 4565 KJ
Energy output - 2955KJ
Efficiency= energy output/ energy input ×100%
=2955/4565
=0.6473 ×100
η =64.73 %
The engine efficiency is 64.73 %
Answer:
Work done, W = 0.0219 J
Explanation:
Given that,
Force constant of the spring, k = 290 N/m
Compression in the spring, x = 12.3 mm = 0.0123 m
We need to find the work done to compress a spring. The work done in this way is given by :
W = 0.0219 J
So, the work done by the spring is 0.0219 joules. Hence, this is the required solution.
Answer:
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