An above ground Swimming pool of 30ft diometer and • 5ft depth is to be filled from a garden hose (smusit Interior) . of length loft and diameter 5 in. If the pressure at the faucet to which the hose is attached remains at 55 psi how long will it take to fill the pool ? The water exits the hose as a free Jet 6 Ft above the faucet.

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.

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?