Several situations are given below. For each, answer the following questions: a) does one quantity depend on another? if so, how? b) if the answer to (a) is yes, sketch a rough graph. label the axes. 1. Scuba diver a scuba diver dives straight down into the water quantities: the depth of the dive the water pressure on the diver

Several situations are given below. For each, answer the following questions: a) does one quantity depend on another? if so, how? b) if the answer to (a) is yes, sketch a rough graph. label the axes. 1. Scuba diver a scuba diver dives straight down into the water quantities: the depth of the dive the water pressure on the diver

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter4: Physics Of Matter

Section: Chapter Questions

Problem 18P: . A storage tank 30 m high is filled with gasoline. (a) Find the gauge pressure at the bottom of the...

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Bird bones have air pockets in them to reduce their weight—this also gives them an average density significantly less than that of the bones of other animals. Suppose an ornithologist weighs a bird bone in air and in water and finds its mass is 45.0 g and its apparent mass when submerged is 3.60 g (the bone is watertight). (a) What mass of water is displaced? (b) What is the volume of the bone? (c) What is its average density?
At a fraternity party, drinking straws have been joined together to make a giant straw that will be used to drink punch placed in a bowl on the ground from atop the fraternity house building. What is the maximum allowable height of the building if the partygoers are successful in drinking the punch? Assume the density of the punch is the same as the density of water.
The dolphin tank at an amusement park is rectangular in shape with a length of 40.0 m, a width of 15.0 m, and a depth of 7.50 m. The tank is filled to the brim to provide maximum splash during dolphin shows. What is the total amount of force exerted by the water on a. the bottom of the tank, b. the longer wall of the tank, and c. the shorter wall of the tank?
Explain why the viscosity of a liquid decreases with temperature, that is, how might an increase in temperature reduce the effects of cohesive forces in a liquid? Also explain why the viscosity of a gas increases with temperature, that is, how does increased gas temperature create more collisions between atoms and molecules?
Gauge pressure in the fluid surrounding an infant's brain may rise as high as 85.0 mm Hg (5 to 12 mm Hg is normal), creating an outward force large enough to make the skull grow abnormally large. (a) Calculate this outward force in newtons on each side of an infant's skull if the effective area of each side is 70.0 cm2. (b) What is the net force acting on the skull?
(a) A rectangular gasoline tank can hold 50.0 kg of gasoline when full. What is the depth of the tank if it is 0.500-m wide by 0.900-m long? (b) Discuss whether this gas tank has a reasonable volume for a passenger car.
Air is blown into a spherical balloon so that, when its radius is 6.50 cm, its radius is increasing at the rate 0.900 cm/s. (a) Find the rate at which the volume of the balloon is increasing. (b) If this volume flow rate of air entering the balloon is constant, at what rate will the radius be increasing when the radius is 13.0 cm? (c) Explain physically why the answer to part (b) is larger or smaller than 0.9 cm/s, if it is different.
. Air flows through a heating duct with a square cross-section with 8-inch sides at a speed of 5.0 ft/s. Just before reaching an outlet in the floor of a room, the duct widens to assume a square cross-section with sides equal to 12 inches. Compute the speed of the air flowing into the room, assuming that we can treat the air as an incompressible fluid.
On October 21, 2001, Ian Ashpole of the United Kingdom achieved a record altitude of 3.35 km (11 000 ft) powered by 600 toy balloons filled with helium. Each filled balloon had a radius of about 0.50 m and an estimated mass of 0.30 kg. (a) Estimate the total buoyant force on the 600 balloons. (b) Estimate the net upward force on all 600 balloons, (c) Ashpole parachuted to Earth after the balloons began to burst at the high altitude and the system lost buoyancy. Why did the balloons burst?
In an immersion measurement of a woman's density, she is found to have a mass of 62.0 kg in air and an apparent mass of 0.0850 kg when completely submerged with lungs empty. (a) What mass of water does she displace? (b) What is her volume? (c) Calculate her density. (d) If her lung capacity is 1.75 L is she able to float without treading water with her lungs filled with air?
. A storage tank 30 m high is filled with gasoline. (a) Find the gauge pressure at the bottom of the tank. (b) Calculate the force that acts on a square access hatch at the bottom of the tank that measures 0.5 m by 0.5 m.
. A dentist's chair with a person in it weighs 1900 N. The output plunger of a hydraulic system starts Do lift the chair when the dental assistant's foot exerts a force of 45 N on the input piston. Neglecting any difference in the heights of the piston and the plunger, what is the ratio of the area of the plunger to the area of the piston?