Typically, the new Moon's shadow _______ a solar eclipse
a. passes north of Earth so as NOT to produce
b. passes south of Earth so as NOT to produce
c. passes either north or south of Earth so as NOT to produce
d. touches the Sun so as to produce
e. touches Earth so as to produce
c
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The lowest-mass object that can initiate thermonuclear fusion of hydrogen has a mass of about
a. 1 solar masses. b. 80 solar masses. c. 8 solar masses. d. 0.08 solar masses. e. 0.001 solar masses.
Energy Conservation With Conservative Forces: In a museum exhibit of a simple pendulum, a very small but dense 6.0-kg ball swings from a very light 2.5-m wire. The ball is released from rest when the pendulum wire makes a 65° angle with the vertical, and it swings in a circular arc with no appreciable friction or air resistance. What is the tension in the wire just as the ball swings through its lowest position?
A. 11 N B. 59 N C. 68 N D. 130 N E. 0 N
The point along a planet's orbit where it is closest to the Sun is called the orbit's
A) period. B) perihelion. C) eccentricity. D) semi-major axis. E) aphelion.
A proton's rest mass is 1.67 × 10^-27 kg. Calculate its total energy when it is accelerated to a speed of 0.80 c
a. 1.5 × 10^-10 J b. 1.0 × 10^-10 J c. 2.5 × 10^-10 J d. 2.0 × 10^-10 J e. 7.5 × 10^-10 J