The open spaces in the crystal lattice of ice contain
A) vapor.
B) trace amounts of water.
C) nothing.
Answer: C
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A delivery truck and a car collide. Which vehicle experiences the greater force?
A. the truck B. the car C. Both the car and the truck experience the same force. D. We need to know the speed of the truck and the car to find the answer. E. We need to know the mass of the truck and the car to find the answer.
Which of the following does not move like a projectile?
A. A rock kicked up by a truck wheel B. An airplane flying at a constant altitude C. A monkey jumping from a tree D. The seeds at a watermelon seed spitting contest
A proton moving eastward with a velocity of 5.0 km/s enters a magnetic field of 0.20 T pointing northward. What are the magnitude and direction of the force that the magnetic field exerts on the proton? (e = 1.60 × 10-19 C)
A) 0 N B) 1.6 × 10-16 N upwards C) 1.6 × 10-16 N downwards D) 1.1 × 10-16 N eastwards E) 4.4 × 10-16 N westwards
A starship is constructed to be 100 m long in the factory. It is launched and as it coasts by Earth, it is measured to be shortened to 5.48 m long
(a) How fast, in terms of the speed of light, is it moving past Earth? (b) What length does the ship's crew measure for the ship?