Which ancient philosopher proposed a heliocentric model of the solar system?

A. Kepler

B. Aristarchus

C. Plato

D. Ptolemy

A proton travels at a speed of 2.0 ... *.10Ò meters/second. Its velocity is at right angles with a magnetic field of strength 5.5 ... *.10ȳ tesla. What is the magnitude of the magnetic force on the proton?

Winds are named based on different factors how are winds usually named

In which phenomenon does Earth's magnetic field play an important part? A retaining gases around Earth to form the atmosphere B. stratifying the atmosphere into layers c. movements of tectonic plates D. spreading of the sea floor E.

Quartz clock is more appropriate than pendulum clock to measure time

Two identical gliders on an air track are held together by a piece of string, compressing a spring between the gliders. While they are moving to the right at a common speed of 0.

A 1,120 kg car is travelling with a speed of 40 m/s. Find its energy.

3. Calculate the amount of current through a 45-watt light bulb that is connected to a 120-volt circuit in your home.

Are oranges called oranges because oranges are orange, or is orange called orange because oranges are orange?

An object at rest has no net force acting on it. a. True b. False

A baseball has mass 0.145 kg. (a) If the velocity of a pitched ball has a magnitude of and the batted ball's velocity is in the opposite direction, find the magnitude of the change in momentum of the ball and of the impulse applied to it by the bat.