You are riding in a spaceship that has no windows, radios, or other means for you to observe or measure what is outside. You wish to determine if the ship is stopped or moving at constant velocity. How can you do this?
A) You can determine if the ship is moving by determining the apparent velocity of light in the spaceship.
B) You can determine if the ship is moving by checking your precision time piece. If it's running slow, the ship is moving.
C) You can determine if the ship is moving by lying down and measuring your height. If you are shorter than usual, the ship is moving.
D) You should give up because you have taken on an impossible task!
D
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According to our theory of solar system formation, what are asteroids and comets?
A) the shattered remains of collisions between planets B) chunks of rock or ice that condensed after the planets and moons finished forming C) chunks of rock or ice that were expelled from planets by volcanoes D) leftover planetesimals that never accreted into planets
Springs: An object attached to a spring is pulled across a horizontal frictionless surface. If the force constant (spring constant) of the spring is 45 N/m and the spring is stretched by 0.88 m when the object is accelerating at 1.4 m/s2, what is the mass of the object?
A. 28 kg B. 24 kg C. 31 kg D. 36 kg
Which types of galaxies have a clearly defined halo component?
A) spirals only B) ellipticals only C) lenticulars only D) irregulars only E) all but irregulars
How much heat is produced in the 10-? resistor in 5.0 s when ? = 18 V?
A. 72 J B. 32 J C. 50 J D. 18 J E. 90 J