Questions from College Physics

Q: In each of six situations, a particle (mass m,

In each of six situations, a particle (mass m, charge q) is located at a point where the electric field has magnitude E. No other forces act on the particles. Rank them in order of the magnitude of th...

Q: This problem illustrates the ideas behind the Millikan oil drop experiment—

This problem illustrates the ideas behind the Millikan oil drop experiment—the first measurement of the electron charge. Millikan examined a fine spray of spherical oil droplets falling through air; t...

Q: A 0.010 kg bullet traveling horizontally at 400.0

A 0.010 kg bullet traveling horizontally at 400.0 m/s strikes a 4.0 kg block of wood sitting at the edge of a table. The bullet is lodged into the wood. If the table height is 1.2 m, how far from the...

Q: A 15 A circuit breaker trips repeatedly. Explain why it would

A 15 A circuit breaker trips repeatedly. Explain why it would be dangerous to replace it with a 20 A circuit breaker.

Q: Why is the brilliance of an artificial diamond made of cubic zirconia

Why is the brilliance of an artificial diamond made of cubic zirconia (n = 1.9) distinctly inferior to the real thing (n = 2.4) even if the two are cut the same way? How would an artificial diamond ma...

Q: An array of four charges is arranged along the x-axis

An array of four charges is arranged along the x-axis at intervals of 1.0 m. (a) If two of the charges are +1.0 µC and two are −1.0 µC, draw a configuratio...

Q: Some digital thermometers measure the current through a semiconductor to determine a

Some digital thermometers measure the current through a semiconductor to determine a patient's temperature. If a thermometer uses a germanium wire that has a resistance of R at 37.0°C (normal body tem...

Q: The distance between atoms in a crystal of NaCl is 0.

The distance between atoms in a crystal of NaCl is 0.28 nm. The crystal is being studied in a neutron diffraction experiment. At what speed must the neutrons be moving so that their de Broglie wavelen...

Q: At what frequency/does a sound wave in air have a

At what frequency/does a sound wave in air have a wavelength of 15 cm, about half the diameter of the human head? Some methods of localization work well only for frequencies below f, whereas others wo...

Q: A 0.50 m long guitar string, of cross-

A 0.50 m long guitar string, of cross-sectional area 1.0 × 10−6 m2, has Young’s modulus Y = 2.0 GPa. By how much must you stretch the string to obtain a tension of 20 N?