A block is attached to a spring. The spring constant is 20N/m. If the spring is compressed by 10cm, what is the maximum vertical height that the block can reach when it is released? The total mass of the block and spring is 80g. (g = 9.8N/kg)

The solid that is formed and usually sinks to the bottom of a solution is the

How do you know how many valence electrons an atom has?

If a rock is thrown upward on the planet mars with a velocity of 10 mys, its height in meters t seconds later is given by y − 10t 2 1.86t 2 . (a) find the average velocity over the given time intervals: (i) [1, 2] (ii) [1, 1.5] (iii) [1, 1.1] (iv) [1, 1.01] (v) [1, 1.001] (b) estimate the instantaneous velocity when t − 1.