Determine the volume V generated by revolving the quarter-circular area about the z-axis through an angle of 90°. 1.9a

Two identical cups containing sand from the same bag are placed on a balance. Cup A Cup B Which statement about the volume and mass of the sand in the cups is correct? O A. The sand in Cup A has greater volume and greater mass than the sand in Cup B. O B. The sand in Cup A has greater volume and less mass than the sand in Cup B. C. The sand in Cup A has less volume and greater mass than the sand in Cup B. D. The sand in Cup A has less volume and less mass than the sand in Cup B.

E15. Water emerges from a faucet at a speed of 1.5 m/s. After falling a short distance, its speed increases to 3 m/s as a result of the gravitational acceleration. By what number now would you multiply the original cross-sectional area of the stream to find the area at the lower position?hoto

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A child is playing with a 0.5 kg ball in the swimming pool. The ball is made of a stiff rubber and has a radius of .25 m. Assume the volume of the ball does not change when held under water. What downward force must the child exert on the ball to hold it in equilibrium just below the surface of the water? a. b. How does this answer change if the child was holding the ball near the bottom of the pool (1.5 m down)?

Water travels through a pipe at 4 m/s. The pipe changes from a radius of 0.75 m to a radius of 0.25 m. What is the area of the 0.75 m radius pipe? m2 Submit Answer Tries 0/2 What is the area of the 0.25 m pipe? m2 Submit Answer Tries 0/2 What is the velocity of the water after the pipe has changed radii? m/s Submit Answer Tries 0/2 How does the pressure change from the 0.75 m pipe to the 0.25 m pipe? Enter a positive number if the pressure increases, a negative number if it decreases. Pa

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Review. Assume a certain liquid, with density 1 230 kg/m3, exerts no friction force on spherical objects. A ball of mass 2.10 kg and radius 9.00 cm is dropped from rest into a deep tank of this liquid from a height of 3.30 m above the surface. (a) Find the speed at which the hall enters the liquid. (b) Evaluate the magnitudes of the two forces that are exerted on the ball as it moves through the liquid. (c) Explain why the ball moves down only a limited distance into the liquid and calculate this distance. (d) With what speed will the ball pop up out of the liquid? (c) How does the time interval tdown, during which the ball moves from the surface down to its lowest point, compare with the lime interval tup for the return trip between the same two points? (f) What If? Now modify the model to suppose the liquid exerts a small friction force on the ball, opposite in direction to its motion. In this case, how do the time intervals tdown and tup compare? Explain your answer with a conceptual argument rather than a numerical calculation.

A car jack works when a mechanic uses a force 3.7 N, on a small piston of radius 3 cm. What force can he exert on a larger piston of radius 0.23 m ? A Moving to another question will save this response. MacBook Air