Questions from College Physics

Q: A plastic beach ball has radius 20.0 cm and mass

A plastic beach ball has radius 20.0 cm and mass 0.10 kg, not including the air inside. (a) What is the weight of the beach ball including the air inside? Assume the air density is 1.3 kg/m3 both ins...

Q: The figure shows a plot of vx(t) for a

The figure shows a plot of vx(t) for a car traveling in a straight line. (a) What is aav,x between t = 6 s and t = 11 s? (b) What is vav,x for the same time interval? (c) What is vav,x for the inter...

Q: A ball is dropped from a height h onto the floor and

A ball is dropped from a height h onto the floor and keeps bouncing. No energy is dissipated, so the ball regains the original height h after each bounce. Sketch the graph for y(t) and list several fe...

Q: A block of wood, with density 780 kg/m3,

A block of wood, with density 780 kg/m3, has a cubic shape with sides 0.330 m long. A cord of negligible mass is used to tie a piece of lead to the bottom of the wood. The lead pulls the wood into the...

Q: A 230.0 g object on a spring oscillates on a

A 230.0 g object on a spring oscillates on a frictionless horizontal surface with frequency 2.00 Hz and amplitude 8.00 cm. Its position as a function of time is given by x = A sin ωt. (a) Sketch a gr...

Q: Suppose the hydrometer has a cylindrical stem of cross-sectional area

Suppose the hydrometer has a cylindrical stem of cross-sectional area 0.400 cm2. The total volume of the bulb and stem is 8.80 cm3, and the mass of the hydrometer is 4.80 g. (a) How far from the top...

Q: What is the period of a pendulum consisting of a 6.

What is the period of a pendulum consisting of a 6.0 kg mass hanging from a 4.0 m long string?

Q: Rank the three arrangements in increasing order of the rotational inertia.

Rank the three arrangements in increasing order of the rotational inertia.

Q: Are evenly spaced specific-gravity markings on the cylinder of a

Are evenly spaced specific-gravity markings on the cylinder of a hydrometer equal distances apart? In other words, is the depth d to which the cylinder is submerged linearly related to the density ρ o...

Q: On a nice day when the temperature outside is 20°C

On a nice day when the temperature outside is 20°C, you take the elevator to the top of the Willis Tower in Chicago, which is 440 m tall. (a) How much less is the air pressure at the top than the air...