When a baseball player bats a ball with a force of 1000 N, the reaction force that the ball exerts against the bat is
A) less than 1000 N.
B) more than 1000 N.
C) 1000 N.
D) need more information
Answer: C
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A body of mass 5.0 kg is suspended by a spring which stretches 10 cm when the mass is attached. It is then displaced downward an additional 5.0 cm and released. Its position as a function of time is approximately
a. y = -0.10 sin 9.9t b. y = 0.10 cos 9.9t c. y = -0.10 cos (9.9t + .1) d. y = 0.10 sin (9.9t + 5) e. y = -0.05 cos 9.9t
A magnifying glass uses a converging lens with a refractive power of 20 diopters. What is the magnification if the image is to be viewed by a relaxed eye with a near point of 25 cm?
A) 5.0 B) 3.0 C) 4.0 D) 1.0 E) 2.0
How many values can the magnetic quantum number have in a hydrogen atom in which the electron has the value of the orbital angular momentum quantum number equal to 8?
A) 9 B) 15 C) 5 D) 8 E) 17
Fast-moving electrons, moving close to c, in a strong magnetic field generate ________ radiation
Fill in the blank(s) with correct word