If ice at -40°C is added to water at +40°C, what final temperature will result?
1.It must be below 0°C.
2.It must be 0°C.
3.It must be above 0°C.
4.It can be below 0°C, 0°C, or above 0°C.
4
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A transverse periodic wave is represented by the equation z(y, t) = 1.50 cm sin(1,250 rad/s t + 10.0
y). What is the frequency of the vibration of the wave?
A. 319 Hz B. 289 Hz C. 240 Hz D. 199 Hz E. 150 Hz
A weight of 200 N is hung from a spring with a spring constant of 2500 N/m and lowered slowly. How much will the spring stretch?
A) 4.00 cm B) 6.00 cm C) 8.00 cm D) 10.0 cm E) 12.0 cm
As the speed of an object increases, its relativistic momentum:
a. stays the same as its classical momentum. b. increases more than its classical momentum. c. increases less than it classical momentum. d. does not change since momentum is a conserved quantity.
The sun appears larger at sunset than it does when overhead because of:
1.Scattering of light. 2.Dispersion. 3.Diffraction. 4.Refraction. 5.An optical illusion. 6.None of the above.