Acar accelerates from rest for 5 seconds until it reaches a speed of 20 m/s. what is the car's acceleration in meters per second per second?

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s

Derive the lens makers formula for convex les?