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1. Would the mass density of an object be the same if the object were on the moon rather than on the earth? Would the weight density be the same? 2. A steel column in a building has a cross-sectional area of 3500 cm2 and supports a weight of 2.5 x 105 N. Find the stress on the column. 3. Each vertical steel column of an office building supports a weight of 1.30 x 105 N and is compressed to 5.90 x 10-3 cm. a. Find the compression in each column if a weight of 5.50 x 105 N is supported. b. If the compression of each steel column is 0.0710 cm, what weight is supported by each column? 4. The specific gravity of an unknown substance is 0.80. Will it float on or sink in gasoline? 5. In a deep dive, a whale is appreciably compressed by the pressure of the surrounding water. What happens to the whale's density? 6. Would it be slightly more difficult to draw soda through a straw at sea level than on top of a very high mountain? Explain. 7. When a steadily flowing gas flows from a larger diameter pipe to a smaller diameter pipe, what happens to the following: a. Its speed b. Its pressure c. The spacing between its streamlines 8. The large piston in a hydraulic lift has a radius of 250 cm2 . What force must be applied to the small piston with a radius of 25 cm2 in order to raise a car of mass 1500 kg? 9. Water flows through a 13.0 cm diameter fire hose at a rate of 4.53 m/s. a. What is the rate of flow through the hose in L/min? b. How many liters pass through the hose in 25.0 min? 10. Suppose you cut a small gap in a metal ring. If you heat the ring, will the gap become wider or narrower? 11. The temperature of a 1 m long aluminum rod is 20°C. If the temperature is increased to 70°C what is the length of the rod if the coefficient of linear expansion for aluminum is 2.3*10-5 /° C.
A spherical balloon has a radius of 6.75m and is filled with helium. The density of helium is 0.179 kg/m3, Determine the largest mass of cargo the balloon can lift
part a calculate the speed of a proton after it accelerates from rest through a potential difference of 150 v . express
The axis of a cylindrical container is vertical. The container is filled with equal masses of oil and water. The oil float son top of the water and the open surface of the oil is at a height h above the bottom of the container.
Consider an aircraft powered by a turbojet engine that has a pressure ratio of 12. The aircraft is stationary on the ground, held in position by its brakes. determine the force that must be applied on the brakes to hold the plane stationary
physics Each of the following objects has a radius of 0.173 m and a mass of 2.48 kg, and each rotates about an axis through its center, Find the magnitude of the angular momentum of each object
A person is standing on crutches. Assume that the forceexerted on each crutch by the ground is directed along the crutch,as the force vectors in the drawing indicate.
A 40-kg football player leaps through the air to collide with andtackle a 60-kg player heading toward him, also in the air. what is the speed and direction of the tangled players
A laser emits 1.30x1018 photons per second in a beam oflight that has a diameter of 2.00mm and a wavelength of514.5nm. evaluate the average electric field strength
a. find the boiling temperature of a juice that is boiling at an absolute pressure of 31.19 kpa. assume that the
A 12,000 lb truck is southbound on the Guadalupe street. Whenit enters the intersection with the MLK boulevard, its velocity is20 MPH in the direction 30° East from South.
Two trains, each having a speed of 28 km/h, are headed at each other on the similar straight track. A bird that can fly 56 km/h flies off the front of one train, when they are 66 km apart and heads directly for the other train. On reaching the other ..
A horizontal meter stick, 100 cm long, supported at the50-centimeter mark has a mass of 500 grams hanging from it at the20-centimeter mark and a 300-gram mass hanging at the 60-centimeter mark
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