The interstellar ________ absorbs light from stars and makes them appear fainter and redder than they otherwise would appear
Fill in the blank(s) with correct word
dust
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A tire pressure gauge reads 30 psi when the atmospheric pressure is 14 psi. The net force on 2 square inches of the tire is 60 lbs
a. True b. False Indicate whether the statement is true or false
We can't detect stellar parallax with naked-eye observations. Which of the following would make parallax easier to observe?
A) getting away from streetlights B) Speeding up the precession of Earth's axis C) speeding up Earth's orbital motion D) slowing down Earth's orbital motion E) increasing the size of Earth's orbit
The amount of heat necessary to change a liquid to a solid at constant temperature is the ______________
Fill in the blank(s) with correct word
A truck weighs twice as much as a car, and is moving at twice the speed of the car. Which statement is true about the truck's kinetic energy (K) compared to that of the car?
A) The truck has 4 times the K of the car. B) All that can be said is that the truck has more K. C) The truck has twice the K of the car. D) The truck has 8 times the K of the car. E) The truck has times the K of the car.