Questions from College Physics

Q: The nucleus of an atom can be modeled as several protons and

The nucleus of an atom can be modeled as several protons and neutrons closely packed together. Each particle has a mass of 1.67 x 10-27 kg and radius on the order of 10-15 m. (a) Use this model and th...

Q: The four tires of an automobile are inflated to a gauge pressure

The four tires of an automobile are inflated to a gauge pressure of 2.0 x 105 Pa. Each tire has an area of 0.024 m2 in contact with the ground. Determine the weight of the automobile.

Q: Suppose a distant world with surface gravity of 7.44 m

Suppose a distant world with surface gravity of 7.44 m/s2 has an atmospheric pressure of 8.04 x 104 Pa at the surface. (a) What force is exerted by the atmosphere on a disk-shaped region 2.00 m in rad...

Q: A normal blood pressure reading is less than 120/80 where

A normal blood pressure reading is less than 120/80 where both numbers are gauge pressures measured in millimeters of mercury (mmHg). What are the (a) Absolute and (b) Gauge pressures in pascals at th...

Q: (a) Calculate the absolute pressure at the bottom of a

(a) Calculate the absolute pressure at the bottom of a freshwater lake at a depth of 27.5 m. Assume the density of the water is 1.00 x 103 kg/m3 and the air above is at a pressure of 101.3 kPa. (b) Wh...

Q: If you are asked to make a very sensitive glass thermometer,

If you are asked to make a very sensitive glass thermometer, which of the following working fluids would you choose? (a) Mercury (b) Alcohol (c) Gasoline (d) Glycerin

Q: A collapsible plastic bag (Fig. P9.11) contains

A collapsible plastic bag (Fig. P9.11) contains a glucose solution. If the average gauge pressure in the vein is 1.33 x 103 Pa, what must be the minimum height h of the bag to infuse glucose into the...

Q: A hydraulic jack has an input piston of area 0.050

A hydraulic jack has an input piston of area 0.050 m2 and an output piston of area 0.70 m2. How much force on the input piston is required to lift a car weighing 1.2 x 104 N?

Q: A container is filled to a depth of 20.0 cm

A container is filled to a depth of 20.0 cm with water. On top of the water floats a 30.0-cm-thick layer of oil with specific gravity 0.700. What is the absolute pressure at the bottom of the containe...

Q: Blaise Pascal duplicated Torricelli’s barometer using a red Bordeaux wine, of

Blaise Pascal duplicated Torricelli’s barometer using a red Bordeaux wine, of density 984 kg/m3 as the working liquid (Fig. P9.14). (a) What was the height h of the wine column for n...