Astudent is bouncing on a trampoline. at her highest point, her feet are 65 cm above the trampoline. when she lands, the trampoline sags 15 cm before propelling her back up. part a for how long is she in contact with the trampoline?

An air bubble of volume 20 cm³ is at the bottom of a lake 40 m deep, where the temperature is 4.0°c. the bubble rises to the surface, which is at a temperature of 20°c.take the temperature of the bubble’s air to be the same as that of the surrounding water. just as the bubble reaches the surface, what is its volume?

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain