What must be the pressure difference between the two ends of a 2.6 km section of pipe, 36 cm in diameter, if it is to transport oil (rho = 950 kg/m^3, η = 0.20 pa*s) at a rate of 900 cm^3/s ? express your answer to two significant figures and include the appropriate units. δ p = 1.3 x 10^3pa

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?

Atomic nuclei of almost all elements consist of

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.