The measured temperature of the cosmic background radiation is ____________________
Fill in the blank(s) with correct word
2.7 K
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The point in or near an object about which the weight of the object itself exerts no net torque is the
A. impulse point B. fulcrum C. center of gravity
The special theory of relativity predicts that there is an upper limit to the speed of an object
It therefore follows that there is also an upper limit on which of the following properties of the object? (There could be more than one correct choice) A) The kinetic energy of the object. B) The total energy of the object. C) The linear momentum of the object. D) None of the above.
A simple pendulum, 2.00 m in length, is released from rest when the support string is at an angle of 35.0° from the vertical. What is the speed of the suspended mass at the bottom of the swing? (g = 9.80 m/s2 and ignore air resistance)
a. 0.941 m/s c. 2.66 m/s b. 1.88 m/s d. 1.33 m/s
A steel sphere sits on top of an aluminum ring. The steel sphere (a = 1.10 × 10^-5/°C) has a diameter of 4.0000 cm at 0°C. The aluminum ring (a = 2.40 × 10^-5/°C) has an inside diameter of 3.9900 cm at 0°C. Closest to which temperature given will the sphere just fall through the ring?
a. 462°C c. 116°C b. 193°C d. 57.7°C