A 0.20-kg object is attached to a spring with spring constant k = 10 N/m and moves with simple harmonic motion over a horizontal, frictionless surface. At the instant that it is displaced from equilibrium by -0.060 m, what is its acceleration?
a. 360 m/s2
c. 3.0 m/s2
b. -30 m/s2
d. 0.18 m/s2
C
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The first planets around other Sun-like stars were discovered
A) by Huygens, following his realization that other stars are Suns. B) by Galileo following the invention of the telescope. C) at the turn of last century. D) about a decade ago. E) at the turn of this century.
A radioactive substance is placed in a sealed container. Three days later, only one-eighth of the sample is still radioactive. What is the half-life of the sample?
A. 4 days B. 2 days C. 1 day D. 12 hrs E. 6 hrs
A shot-putter moves his arm and the 6.00-kg shot through a distance of 1.25 m, giving the shot a velocity of 8.20 m/s from rest. Find the average force exerted on the shot during this time
a. 323 N b. 161 N c. 118 N d. 12.7 N e. 252 N
The celestial equator always passes directly overhead
Indicate whether the statement is true or false