Two spaceships are traveling through space at 0.6c relative to the Earth. If the ships are headed directly toward each other, what is their approach velocity, as measured by a person on either craft?
A) 1.2c
B) c
C) 0.6c
D) 0
E) none of the above
E
Physics & Space Science
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When you leave your warm house for an hour or so on a cold day, to save energy you should turn the thermostat
A) down. B) up. C) off. D) to room temperature.
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During which season will more insolation be delivered to a vertical south-facing window on a clear day?
a. winter b. fall c. spring d. summer e. depends upon the R-value
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Tides are caused because different parts of the earth's oceans are at different distances from the moon
Indicate whether the statement is true or false
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