The weakest of the four fundamental forces is

A) the weak nuclear force.
B) the electromagnetic force.
C) the gravitational force.
D) the strong nuclear force.


C

Physics & Space Science

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A repelling force must occur between two charged objects under which conditions?

a. Charges are of equal magnitude. c. Charges are of unequal magnitude. b. Charges are of unlike signs. d. Charges are of like signs.

Physics & Space Science

An object starts from rest at time t = 0.00 s and moves with constant acceleration. The object travels 3.00 m from time t = 1.00 s to time t = 2.00 s. What is the acceleration of the object?

A) -3.00 m/s2 B) 6.00 m/s2 C) -1.00 m/s2 D) 1.00 m/s2 E) 2.00 m/s2

Physics & Space Science

The acceleration of an object as a function of time is given by a(t) = (3.00 m/s3)t, where t is in seconds. If the object is at rest at time t = 0.00 s, what is the velocity of the object at time t = 6.00 s?

A) 108 m/s B) 18.0 m/s C) 15.0 m/s D) 54.0 m/s E) 0.00 m/s

Physics & Space Science

Which of the following does NOT contribute to the thermoelectric effect?

a.Conduction electrons pass thermal and electrical energy. b. Higher temperatures cause more electrons to be in excited states. c. The conduction and resistive properties of a semiconductor are related to temperature. d. In a metal, some electrons are essentially free. e. The magnetic moments of electrons in metals tend to align when heated.

Physics & Space Science