FREE AFCT General Science: Physical and Chemical Questions and Answers

Question 1

According to Newton's First Law of Motion, an object in motion will stay in motion unless acted upon by what?

Accepted Answer

An unbalanced force

Answer

Newton's First Law, also known as the law of inertia, states that an object's state of motion will not change unless an external, unbalanced force is applied to it. An unbalanced force is required to change the object's velocity (i.e., to accelerate it).

Question 2

The process by which a substance changes directly from a solid to a gas is called what?

Accepted Answer

Sublimation

Answer

Sublimation is the phase transition of a substance directly from the solid to the gas state, without passing through the liquid phase. A common example is solid carbon dioxide (dry ice) turning into gaseous carbon dioxide at room temperature.

Question 3

What form of energy is associated with the motion of an object?

Accepted Answer

Kinetic energy

Answer

Kinetic energy is the energy that an object possesses due to its motion. It is dependent on both the mass of the object and the square of its velocity. Potential energy is stored energy based on an object's position or state.

Question 4

What are the three primary subatomic particles that make up an atom?

Accepted Answer

Protons, Neutrons, and Electrons

Answer

An atom is composed of a central nucleus containing positively charged protons and neutral neutrons. Negatively charged electrons orbit this nucleus. These three particles are the fundamental components of an atom.

Question 5

In an electrical circuit, what is the primary function of a resistor?

Accepted Answer

Impedes the flow of current

Answer

A resistor is a passive electrical component with a specific electrical resistance. Its primary function is to reduce, or impede, the flow of current. This is useful for controlling current levels, adjusting signal levels, and dividing voltages.

(AFCT) Armed Forces Classification Test Practice Test

(AFCT) Armed Forces Classification Test Practice Test

FREE AFCT General Science: Physical and Chemical Questions and Answers