Questions from College Physics

Q: A 2.4 m length of copper pipe extends directly from

A 2.4 m length of copper pipe extends directly from a water heater in a basement to a faucet on the first floor of a house. If the faucet isn't fixed in place, how much will it rise when the pipe is h...

Q: What is the mass of an 16O atom in units of MeV

What is the mass of an 16O atom in units of MeV/c2? (1 MeV/c2 is the mass of a particle with rest energy 1 MeV.)

Q: Isolated atoms (or atoms in a dilute gas) radiate photons

Isolated atoms (or atoms in a dilute gas) radiate photons at discrete energies characteristic of that atom. In dense matter, the spectrum radiated is quasi-continuous. Why doesn’t the same thing happe...

Q: Is e the smallest fundamental unit of charge? The smallest observable

Is e the smallest fundamental unit of charge? The smallest observable unit of charge? [Hint: Try to come up with a meson or baryon with a charge that is not an integral multiple of e.] Explain.

Q: A 6.0 pF capacitor is needed to construct a circuit

A 6.0 pF capacitor is needed to construct a circuit. The only capacitors available are rated as 9.0 pF. How can a combination of three 9.0 pF capacitors be assembled so that the equivalent capacitance...

Q: Two 35.0 cm metal rods, one made of copper

Two 35.0 cm metal rods, one made of copper and one made of aluminum, are placed end to end, touching each other. One end is fixed, so that it cannot move. The rods are heated from 0.0°C to 150°C. How...

Q: An object of mass m is hung from the base of an

An object of mass m is hung from the base of an ideal spring that is suspended from the ceiling. The spring has a spring constant k. The object is pulled down a distance D from equilibrium and release...

Q: The photosensitive cells (rods and cones) in the retina are

The photosensitive cells (rods and cones) in the retina are most densely packed in the fovea—the part of the retina used to see straight ahead. In the fovea, the cells are all cones spaced about 1 µm...

Q: Sketch a graph of y versus x for the function /

Sketch a graph of y versus x for the function for the times t = 0 and 0.96 s. Make the graphs on the same axes, using a solid line for the first and a dashed line for the second. Use the values k = (&...

Q: Steel railroad tracks of length 18.30 m are laid at

Steel railroad tracks of length 18.30 m are laid at 10.0°C. How much space should be left between the track sections if they are to just touch when the temperature is 50.0°C?