Questions from College Physics

Q: Use the expression in Problem 54 to find (a)

Use the expression in Problem 54 to find (a) the maximum range of a projectile with launch speed vi and (b) the launch angle θ at which the maximum range occurs.

Q: Use the thin-lens equation to show that the transverse magnification

Use the thin-lens equation to show that the transverse magnification due to the objective of a microscope is mo = −L/fo. [Hints: The object is near the focal point of the objective; do not assume it i...

Q: Jane is sitting on a chair with her lower leg at a

Jane is sitting on a chair with her lower leg at a 30.0° angle with respect to the vertical, as shown. You need to develop a computer model of her leg to assist in some medical research. If...

Q: A pendulum is 0.80 m long, and the bob

A pendulum is 0.80 m long, and the bob has a mass of 1.0 kg. At the bottom of its swing, the bob’s speed is 1.6 m/s. (a) What is the tension in the string at the bottom of the swing? (b) Explain why...

Q: A concave mirror has radius of curvature R. A ray of

A concave mirror has radius of curvature R. A ray of light parallel to and a distance / away from the optical axis is incident on the mirror. (a) Use the law of reflection to find the distance fro...

Q: A 35.0 kg child swings on a rope with a

A 35.0 kg child swings on a rope with a length of 6.50 m that is hanging from a tree. At the bottom of the swing, the child is moving at a speed of 4.20 m/s. What is the tension in the rope?

Q: (a) What is the angular size of the Moon as

(a) What is the angular size of the Moon as viewed from Earth's surface? See Appendix B for necessary information. (b) Elysha is gazing at a full Moon at night. The diameter of her pupil is 7.0 mm an...

Q: A car approaches the top of a hill that is shaped like

A car approaches the top of a hill that is shaped like a vertical circle with a radius of 55.0 m. What is the fastest speed that the car can go over the hill without losing contact with the ground?

Q: A beam of coherent light of wavelength 623 nm in air is

A beam of coherent light of wavelength 623 nm in air is incident on a rectangular block of glass with index of refraction 1.40. If, after emerging from the block, the wave that travels through the gla...

Q: A child pushes a merry-go-round from rest to

A child pushes a merry-go-round from rest to a final angular speed of 0.50 rev/s with constant angular acceleration. In doing so, the child pushes the merry-go-round 2.0 revolutions. What is the angul...