Question

# What is the mass of a solid iron wrecking ball of volume 18.0 cm3? Take the...

What is the mass of a solid iron wrecking ball of volume 18.0 cm3? Take the density of iron to be 7.80 x 103 kg/m3. Hint: convert volume to m3.

Select one:

a. 1.91 x 108 kg

b. 2.70 x 1011 kg

c. 1.40 x 103 kg

d. 0.140 kg

e. 191 kg

Q2: Consider a bed of nails with an upper weight limit of 200 lbs (which corresponds to a weight of 889 N). Each nail has a tip area of 7.85 x 10-7 m2. When a 200-lb man lies down on the bed, the pressure at each nail point is 39.5 PSI. How many nails does the bed have?

Select one:

e. 4.41 x 107 nails

Q3:What is the difference in blood pressure (in Pascals) between the bottom of the feet and the top of the head of a 1.45-m-tall person standing vertically? Take the density of blood to be 1060 kg/m3.

Select one:

a. 1.18 Pa

b. 136 Pa

c. 1.16x105 Pa

d. 1.51x104 Pa

e. 1.71x 104 Pa

Q4 :Determine the absolute pressure on the bottom of a swimming pool 28.0 m by 8.50 m whose uniform depth is 1.80 m. Also determine the absolute pressure against the side of the pool near the bottom.

Select one:

a. 1.76 x 104 Pa 1.76 x 104 Pa

b. 2.74 x 105 Pa                         1.76 x 104Pa

c. 1.013 x 105 Pa                        1.013 x 105 Pa

d. 1.19 x 105Pa 2.74 x 105 Pa

e. 1.19 x 105 Pa                        1.19 x 105 Pa

The surface of the water in a storage tank is 25.0 m above a water faucet in the kitchen of a house. In other words, the head of water is 25.0 m at the faucet. Calculate the difference in water pressure between the faucet and the surface of the water in the tank. Where is the pressure greater, at the faucet, or at the surface of the water?

Select one:

a. 2.45 x105 Pa faucet

b. 1.013 x 105 Pa surface of the water

c. 136 Pa surface of the water

d. 30.0 Pa faucet

e. 2.94 x 105 Pa faucet

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