Q1 TO 13 -1 Would the mass density of an object be the same if the object were on the moon rather....

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 be the same?

2 A steel column in a building has a cross-sectional area of?3500 cm?^2 and supports a weight of 2.5 x?10?^5 N. Find the stress of the column.

3 Each vertical steel column of an office building supports a weight of 1.30 x?10?^5 N and is compressed to 5.90 x?10?^(-3) cm.
Find the compression in each column if a weight of 5.50 x?10?^5 N is supported.
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 that 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?
Its speed.
Its pressure
The spacing between its streamlines
8 The large piston in a hydraulic lift has a radius of?250 cm?^2. What force must be applied to the small piston with a radius of?25 cm?^2 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.

What is the rate of flow through the hose in L/min?

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 2.3x?10?^(-5)/° C.

12 The specific heat capacity of copper is 0.092 C/gm/° C. Show that the amount of heat needed to raise the temperature of a 10-gram piece of copper from 0° C to 100° C is 92 calories. How does this compare with the heat needed to raise the temperature of the same mass of water through the same difference?

13 A liter of water is used to cool electronics. If 1,000 Joules of heat is given off by the electronics, by what temperature does the water increase? One liter of water has a mass of 1 kg and a specific heat of 4.184 Joules/(g C°)