The ancient Greek who is known for championing the concept of the atom was named ______________
Fill in the blank(s) with correct word
Democritus, or Leucippus
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The path of totality for a solar eclipse is swept out by the tip of the moon's umbra as the umbra moves over Earth
Indicate whether the statement is true or false
The most circular of the elliptical galaxies are class
A. Sb. B. E7. C. Irr 1. D. E0. E. Ea.
The rate of flow of electric charge is
a. voltage. b. current. c. resistance. d. electric field. e. critical temperature.
A solid uniform ball of mass 1.0 kg and radius 1.0 cm starts from rest and rolls down a 1.0-m high ramp. There is enough friction on the ramp to prevent the ball from slipping as it rolls down
(a) What is the forward speed of the ball when it reaches the bottom of the ramp? (b) What would be the forward speed of the ball if there were no friction on the ramp? (c) Since the ball starts from the same height in both cases, why is the speed different?