Who was the first to propose solar system formation with gravity as a key component of the hypothesis?
a. Isaac Newton
b. René Descartes
c. Pierre-Simon de Laplace
d. Georges-Louis de Buffon
e. Emanuel Swedenborg
d
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A 2.00 kg pendulum bob on a string 3.00 m long is released with a velocity of 1.00 m/s when the support string makes an angle of 30.0 degrees with the vertical. What is the tension in the string at the highest point of its motion?
A. 30.8 N B. 27.5 N C. 20.1 N D. 16.6 N E. 10.5 N
The force of gravity does work on a satellite when it is in
A) circular orbit. B) elliptical orbit. C) both of these D) neither of these
A ball rolls horizontally off the edge of a cliff at 4.00 m/s. If the ball lands a distance of 30.0 m from the base of the vertical cliff, what is the height of the cliff?
A) 276 m B) 138 m C) 9.20 m D) 552 m E) 92.0 m
Which scientist first postulated the existence of ions?
a. Lewis b. Dalton c. Arrhenius d. Berzelius