A baseball is hit with a bat and, as a result, its direction is completely reversed and its speed is doubled. If the actual contact with the bat lasts 0.73 s, what is the ratio of the acceleration to the original velocity?

How much charge is transferred by a current of 7A flowing through a lamp for 80 seconds?

An electric grinder uses a grinding wheel

A pure lead bar 10 cm long is maintained with one end at T=300 K and the other at 310 K. The thermoelectric potential difference thus induced across the ends is 12.8? V. Find the thermoelectric power for lead in this temperature range

a cylindrical can of radius 200mm has liquid weighs 50kg. Find the height of liquid in cm in the can, if the density is 0.8g/cm3.

Which kind of energy transformation occurs when the skater's board falls back to the ramp

A heavy rope, 50 ft long, weighs 0.5 lb/ft and hangs over the edge of a building 120 ft high. how much work is done (in ft-lb) in pulling half the rope to the top of the building?

Does adding a neutron to an atom's nucleus makes it an ion?

What is the difference between a fault-block and upwarped mountains?

Which of the following is not one of the reasons to properly warm up before exercising? A. Develop overall flexibility. B. Increase blood flow to the muscles and raise body temperature. C. Prevent injuries such as strains sprains and muscle cramps.

you are not chilly when swimming in warm water. but when emerging from warm water on a warm summer day, you feel chilly if the wind is blowing. Explain