A golf ball of mass 0.045 kg is hit off a tee at a speed of 38 m/s. The golf club was in contact with the ball for 3.5x10-3 seconds. What was the force felt by the golf ball? Why does “following through” result in the ball leaving the club head with greater velocity?

Which is an example of gaining a static charge by conduction? a) rubbing a balloon against your hair. b) shuffling your shoes across a carpet. c) bringing a charged rod near an electroscope. d) touching your car on a cold day and getting a shock.

More solar radiation is absorbed by earth’s surface than by

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.