1 Select the correct answer.
The potential energy for a mass on a spring is proportional to the square of which of these quantities?
O A.
mass
ОВ.
frequency
O c. period
OD.
displacement
O E velocity
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Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.

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