A gravitational "sling-shot":
A) causes comets to crash into planets, such as Jupiter in 1994.
B) allowed the Apollo astronauts to reach the Moon in 1969.
C) is the accepted theory for the formation of the asteroid belt.
D) changes the speed and direction of a spacecraft nearing a massive planet.
E) explains how the solar system was formed after a near collision with another star.
D
You might also like to view...
Mercury's crust
A. is much thicker than Earth's or Venus's. B. is molten because it is so close to the Sun. C. has an unusually high concentration of silicate rocks. D. may have been mostly lost after a collision with a large planetesimal.
A motor drives a shaft at f 5 10 Hz and delivers P 5 35 kW of power. The allowable shear stress in the shaft is 45 MPa. The minimum diameter of the shaft is approximately:
(A) 35 mm
(B) 40 mm
(C) 47 mm
(D) 61 mm
If 5.0 × 10^21 electrons pass through a 20-? resistor in 10 min, what is the potential difference across the resistor?
a. 21 V b. 32 V c. 27 V d. 37 V e. 54 V
In the figure below, the current is measured with the ammeter at the bottom of the circuit. When the switch is opened, the reading on the ammeter