Questions from College Physics

Q: A Canada goose floats with 25% of its volume below water

A Canada goose floats with 25% of its volume below water. What is the average density of the goose?

Q: A jogger runs counterclockwise around a path of radius 90.0

A jogger runs counterclockwise around a path of radius 90.0 m at constant speed. He makes 1.00 revolution in 188.4 s. At t = 0, he is heading due east. (a) What is the jogger’s instantaneous velocity...

Q: Why must we use absolute temperature (temperature in kelvins) in

Why must we use absolute temperature (temperature in kelvins) in the ideal gas law (PV = NkBT)? Explain how using the Celsius scale would give nonsensical results.

Q: It has only been fairly recently that 1.0 F capacitors

It has only been fairly recently that 1.0 F capacitors have been readily available. A typical 1.0 F capacitor can withstand up to 5.00 V. To get an idea why it isn't easy to make a 1.0 F capacitor, im...

Q: Human feet and legs store elastic energy when walking or running.

Human feet and legs store elastic energy when walking or running. They are not nearly as efficient at doing so as kangaroo legs, but the effect is significant nonetheless. If not for the storage of el...

Q: The power supply for a pacemaker is a small amount of radioactive

The power supply for a pacemaker is a small amount of radioactive 238Pu. This nuclide decays by alpha decay with a half-life of 87.7 yr. The pacemaker is typically replaced every 10.0 yr. (a) By what...

Q: What fundamental particles make up an atom?

What fundamental particles make up an atom?

Q: Some feathers of the ruby-throated hummingbird have an iridescent green

Some feathers of the ruby-throated hummingbird have an iridescent green color due to interference. A simplified model of the step structure of the feather is shown in the figure. If the strongest refl...

Q: Linearly polarized light of intensity I0 shines through two polarizing sheets.

Linearly polarized light of intensity I0 shines through two polarizing sheets. The second of the sheets has its transmission axis perpendicular to the polarization of the light before it passes throug...

Q: If a clothes washer’s drum has a radius of 25 cm and

If a clothes washer’s drum has a radius of 25 cm and spins at 4.0 rev/s, what is the strength of the apparent gravitational field to which the clothes are subjected? Ignore Earth’s gravity and express...