Questions from College Physics

Q: What is the period of a pendulum formed by placing a horizontal

What is the period of a pendulum formed by placing a horizontal axis (a) through the end of a meterstick (100 cm mark)? (b) through the 75 cm mark? (c) through the 60 cm mark?

Q: Calculate, according to the Bohr model, the speed of the

Calculate, according to the Bohr model, the speed of the electron in the ground state of the hydrogen atom.

Q: A cell membrane has a surface area of 1.0 ×

A cell membrane has a surface area of 1.0 × 10−7 m2, a dielectric constant of 5.2, and a thickness of 7.5 nm. The membrane acts like the dielectric in a parallel plate capacitor; a layer of positive i...

Q: How many hydrogen atoms are present in 684.6 g of

How many hydrogen atoms are present in 684.6 g of sucrose (C12H22O11)?

Q: Find the electric field at point A, the upper left corner

Find the electric field at point A, the upper left corner.

Q: A rifle has a mass of 4.5 kg and it

A rifle has a mass of 4.5 kg and it fires a bullet of mass 10.0 g at a muzzle speed of 820 m/s. What is the recoil speed of the rifle as the bullet leaves the gun barrel?

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

In each of six situations, a particle (mass m, charge q) moves from a point where the potential is Vi to a point where the potential is Vf. Apart from the electric force, no forces act on the particle...

Q: Why is a transverse wave sometimes called a shear wave?

Why is a transverse wave sometimes called a shear wave?

Q: A longitudinal wave has a wavelength of 10 cm and an amplitude

A longitudinal wave has a wavelength of 10 cm and an amplitude of 5.0 cm and travels in the y-direction. The wave speed in this medium is 80 cm/s. (a) Describe the motion of a particle in the medium...

Q: Ammeters often contain fuses that protect them from large currents, whereas

Ammeters often contain fuses that protect them from large currents, whereas voltmeters seldom do. Explain.