The length of a telescope is 2.20 m and the focal length of the eyepiece is 1.9 cm. What is the focal length of the objective?
A) 41 cm
B) 45 cm
C) 111 cm
D) 218 cm
E) 16 cm
D
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Which of the following measures would help reduce the need for new electric power plants?
A) Energy storage methods at electric power plants. B) More energy-efficient use of electricity. C) "Time-of-day"pricing that charges more for electricity at the "peak" times. D) All three of the above measures would help. E) Both measures A and C would help, but not B.
A rigid cylinder (15 cm radius, 15 cm height) contains nitrogen gas 
at standard temperature and pressure. What heat input is required to increase the average translational kinetic energy of the nitrogen molecules by 15%?
A. 150 J B. 130 J C. 260 J D. 86 J E. 51 J F. 77 J
Does Simple Harmonic Motion occur when the force, acting on a mass, is positively proportional to the displacement (F = kx)? Explain
What will be an ideal response?
What is the symbol for the nuclide with 38 protons and 50 neutrons?
a. 
b. 
c. 
d. 