Questions from College Physics

Q: 1. When both are expressed in terms of SI base units

1. When both are expressed in terms of SI base units, torque has the same units as (a) angular acceleration (b) angular momentum (c) force (d) energy (e) rotational inertia (f) angular velocity 2. A...

Q: 1. Bernoulli’s equation applies to (a) any fluid

1. Bernoulli’s equation applies to (a) any fluid. (b) an incompressible fluid, whether viscous or not. (c) an incompressible, nonviscous fluid, whether the flow is turbulent or not....

Q: The time constant τ for an LR circuit must be some combination

The time constant τ for an LR circuit must be some combination of L, R, and ℰ. (a) Write the units of each of these three quantities in terms of V, A, and s. (b) Show that the only combination that...

Q: In capacitive electrostimulation, electrodes are placed on opposite sides of a

In capacitive electrostimulation, electrodes are placed on opposite sides of a limb. A potential difference is applied to the electrodes, which is believed to be beneficial in treating bone defects an...

Q: A bullet leaves the barrel of a rifle with a speed of

A bullet leaves the barrel of a rifle with a speed of 300.0 m/s. The mass of the bullet is 10.0 g. (a) What is the de Broglie wavelength of the bullet? (b) Compare λ with the diameter of a proton (a...

Q: Why are days longer in summer than in winter?

Why are days longer in summer than in winter?

Q: Questions 1–4. An object is suspended vertically from an

Questions 1–4. An object is suspended vertically from an ideal spring. The spring is initially in its relaxed position. The object is then released and oscillates about the equilibrium position. Answe...

Q: A vertical metal rod of length 36 cm moves north at constant

A vertical metal rod of length 36 cm moves north at constant speed 1.6 m/s in a 0.40 T magnetic field directed 27° east of north. (a) Which end of the rod has an accumulation of excess electrons? (b...

Q: A jet plane is flying at 130 m/s relative to

A jet plane is flying at 130 m/s relative to the ground. There is no wind. The engines take in 81 kg of air per second. Hot gas (burned fuel and air) is expelled from the engines at high speed. The en...

Q: Two point charges are located on the x-axis: a

Two point charges are located on the x-axis: a charge of +6.0 nC at x = 0 and an unknown charge q at x = 0.50 m. No other charges are nearby. If the electric field is zero at the point x = 1.0 m, what...