Saturn's rings are composed of icy particles
a. True
b. False
Indicate whether the statement is true or false
True
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Gravitational Force: Two small objects, with masses m and M, are originally a distance r apart, and the magnitude of the gravitational force on each one is F. The masses are changed to 2m and 2M, and the distance is changed to 4r. What is the magnitude of the new gravitational force?
A. F/16 B. F/4 C. 16F D. 4F E. F/2
What current in a solenoid 15.0-cm long wound with 100 turns would produce a magnetic field equal to that of the Earth, 5.00 × 10?5 T?
What will be an ideal response?
If an x-ray beam of wavelength 1.4 × 10-10 m makes an angle of 20° with a set of planes in a crystal causing first order constructive interference, at what angle will the second order line appear?
A) 40° B) 20° C) 43° D) 4.0° E) 11°
In a steam engine, steam at 140°C in a turbine does work on an external system, and the steam leaves the turbine at 100°C. The efficiency of the steam engine is 5%. The relevant physical principle is
a. the first law of thermodynamics b. the second law of thermodynamics c. specific heat capacity d. operation of a heat pump e. none of the above