Questions from College Physics

Q: Rank the points in order of mechanical energy, from greatest to

Rank the points in order of mechanical energy, from greatest to least, assuming no friction or air resistance.

Q: A mass of 1.4 kg of water at 22°

A mass of 1.4 kg of water at 22°C is poured from a height of 2.5 m into a vessel containing 5.0 kg of water at 22°C. (a) How much does the internal energy of the 6.4 kg of water increase? (b) Is it...

Q: What is the mass defect of the 14N nucleus?

What is the mass defect of the 14N nucleus?

Q: You are swimming in the ocean as water waves with wavelength 9

You are swimming in the ocean as water waves with wavelength 9.6 m pass by. What is the closest distance that another swimmer could be so that his motion is exactly opposite yours (he goes up when you...

Q: Prove that, in an EM wave traveling in vacuum, the

Prove that, in an EM wave traveling in vacuum, the electric and magnetic energy densities are equal; that is, prove that at any point and at any instant of time.

Q: (a) Write an equation for a harmonic wave with amplitude

(a) Write an equation for a harmonic wave with amplitude 0.750 mm, frequency 36.0 Hz, and wave speed 144 m/s traveling in the +x- direction. At t = 0, the point x = 0 is at its maximum displacement in...

Q: In a game of shuffleboard, a disk with an initial speed

In a game of shuffleboard, a disk with an initial speed of 3.2 m/s travels 6.0 m before coming to rest. (a) What was the acceleration of the disk? (b) What was the coefficient of kinetic friction be...

Q: The intensity of the sound wave from a jet airplane as it

The intensity of the sound wave from a jet airplane as it is taking off is 100 W/m2 at a distance of 5.0 m. What is the intensity of the sound wave that reaches the ears of a person standing at a dist...

Q: A scout troop is practicing its orienteering skills with map and compass

A scout troop is practicing its orienteering skills with map and compass. First they walk due east for 1.2 km. Next, they walk 45° west of north for 2.7 km. In what direction must they walk to go dire...

Q: At time t = 0, block A of mass 0.

At time t = 0, block A of mass 0.225 kg and block B of mass 0.600 kg rest on a horizontal frictionless surface a distance 3.40 m apart, with block A located to the left of block B. A horizontal force...