Why is it important for scientists to find sources other than fossil fuels for energy production? o A. Not enough organic material exists to replace fossil fuels.
o B. The formation of fossil fuels results in pollution.
OC Fossil fuels store energy for a short period of time.
OD. Fossil fuel reserves are being depleted (used up).

What do you think car designers do if the damage caused by a crash test is too severe?

Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c