When a tennis racquet hits a ball,
A) the racquet loses as much speed as the ball gains.
B) the ball is set in motion with the same speed of the racquet upon contact.
C) the ball hits the racquet.
D) all of the above
Answer: C
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A charged particle that is moving in a static uniform magnetic field
A) will always experience a magnetic force, regardless of its direction of motion. B) may experience a magnetic force which will cause its speed to change. C) may experience a magnetic force, but its speed will not change. D) may experience a magnetic force, but its direction of motion will not change. E) None of the above statements are true.
Which of the following is true about protons and neutrons?
A) They have exactly the same mass. B) They have exactly the same charge. C) They are composed of the same number of quarks. D) They are fundamental particles that cannot be broken into smaller particles. E) They are leptons.
Which property does color best represent?
a. velocity b. thermal energy c. temperature d. heat
All the planets orbit the Sun in the ________ plane
Fill in the blank(s) with correct word