Which of the following conditions must exist for a solar eclipse to occur?
A) Moon phase is new, and the Moon is passing through the Earth's orbital plane.
B) The only condition is that the phase of the Moon must be full.
C) Moon phase is full, and the Moon is passing through the Earth's orbital plane.
D) The only condition is that the phase of the Moon must be new.
A
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The clouds of Venus are much higher in its atmosphere than are those in our troposphere
Indicate whether the statement is true or false
Which surface feature of the Moon is NOT found on Mercury?
A. craters B. rays C. maria D. mountains
How is Titan, the moon of Saturn, similar to the Earth?
A) like the Earth, Titan has an atmosphere made mostly of molecular nitrogen B) Titan, like the Earth, has an internal magnetic field C) like the Earth, Titan has oceans of liquid water on its surface D) Titan is almost the same size as the Earth
Two cars are traveling around identical circular racetracks. Car A travels at a constant speed of 20 m/s. Car B starts at rest and speeds up with constant tangential acceleration until its speed is 40 m/s. When car B has the same (tangential) velocity as car A, it is always true that:
a. it is passing car A. b. it has the same linear (tangential) acceleration as car A. c. it has the same centripetal acceleration as car A. d. it has the same total acceleration as car A. e. it has traveled farther than car A since starting.