A car has a momentum of 20,000 kg. m/s. What would the car's momentum be if its velocity doubles?

10,000 kg. m/s

20,000 kg. mis

40,000 kg • m/s

80,000 kg. m/s

A piano tuner hears three beats per second when a tuning fork and a note are sounded together and six beats per second after the string is tightened. What should the tuner do next, tighten or loosen the string? Explain.

Freight trains can produce only relatively small acceleration and decelerations. (a) What is the final velocity (in m/s) of a freight train that accelerates at a rate of 0.0400 m/s2 for 8.00 min, starting with an initial velocity of 3.00 m/s? 22.

A wave has a frequency of 100 Hz and a wave speed of 4.0 m/s. What is the wavelength? A. 25 m B. 0.40 m C. 0.04 m D. 400 m

Which of the following is NOT an exercise myth? A. Aerobic exercise is all that matter B. Women who strength train will bulk up C. Low to moderate level of exertion can be sustained over long periods of time D.

Ten narrow slits are equally spaced 3.00 mm apart and illuminated with indigo light of wavelength 444 nm. The width of bright fringes can be calculated as the separation between the two adjacent dark fringes on either side.

Which nitrogen base sequence is the partner of C-A-T-C-G-A? O C-A-T-C-G-A O G-T-A-G-C-T OT-G-C-T-A-G O G-C-A-T-G-T TI

What is the kind of energy that comes from movement?

The average kinetic energy of 1 mole of a gas at 273 degrees Celsius is: 6.81 x 103 J 3.40 x 103 J 1.51 x 103 J 6.72 x 101 J

Which one of the following crystal structures has the fewest slip directions and therefore the metals with this structure are generally more difficult to deform at room temperature? a. BCC b. FCC c. HCP d. BCT

To rid the body of wastes, including excess water and salts" is the purpose of what human body system? A) Digestive B) Excretory C) Skeletal D) Nervous