Quasars are most common with red shifts
a. less than 0.1
b. less than 0.5
c. of about 2
d. greater than 6
e. greater than 8
C
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Which two planets are known as ice giants?
A. Earth and Mars B. Jupiter and Saturn C. Uranus and Neptune D. Pluto and Charon
What type of lens is used in a pinhole camera?
A. Converging B. Diverging C. Spherical D. No lens is used
The system shown is released from rest and moves 50 cm in 1.0 s. What is the value of M? All surfaces are frictionless
a.
0.42 kg
b.
0.34 kg
c.
0.50 kg
d.
0.59 kg
e.
0.68 kg
In a rollercoaster, provided losses of thermal energy because of friction can be neglected because:
a. the mechanical energy increases as the car moves to the top of the slope. b. the mechanical energy decreases as the car moves to the top of the slope. c. the gravitational potential energy decreases as the car moves to the top of the slope. d. the kinetic energy decreases as the car moves to the top of the slope. e. the rollercoaster moves at constant speed as its height above the ground increases.