For this situation, I push on a heavy chair.Suppose I push lightly on the chair, and the chair doesn't move at all. Then the strength of the force the chair exerts on me is
a. less than the force I exert on the chair.
b. equal to the force I exert on the chair.
c. greater than the force I exert on the chair.
d. zero.
b
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Bacteria are examples of
A) unicellular prokaryotes B) unicellular eukaryotes C) multicellular eukaryotes D) multicellular prokaryotes
A charged particle (mass = 4.0 ?g, charge = 5.0 ?C) moves in a region where the only force on it is magnetic. What is the magnitude of the acceleration of the particle at a point where the speed of the particle is 5.0 km/s, the magnitude of the magnetic field is 8.0 mT, and the angle between the direction of the magnetic field and the velocity of the particle is 60°?
a. 39 km/s2 b. 43 km/s2 c. 48 km/s2 d. 52 km/s2 e. 25 km/s2
The part of the Milky Way we are most familiar with is the
A) Corona. B) Galactic Disk. C) Galactic halo. D) Galactic Bulge. E) Galactic center.
Which of the following statements is not one of Newton's Laws of Motion?
A) What goes up must come down. B) The rate of change of momentum of an object is equal to the net force applied to the object. C) In the absence of a net force acting upon it, an object moves with constant velocity. D) For any force, there always is an equal and opposite reaction force.