ASVAB GENERAL SCIENCE: PHYSICAL SCIENCE EXAM

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ASVAB GENERAL SCIENCE: PHYSICAL SCIENCE EXAM

QUESTIONS

Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -100 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: Energy

Answer:

The ability to do work.

Question 2: Concurrent forces

Answer:

When two or more forces work on an object.

Question 3: Chemical bonding

Answer:

When atoms combine to form molecules.

Question 4: Law of conservation of mass and energy

Answer:

States that matter and energy are neither created nor lost during chemical reactions.States that matter and energy are interchangeable under special conditions.

Question 5: Fulcrum

Answer:

Stationary point about which an object rotates.

Question 6: Temperature scales

Answer:

-Celsius: bp:100

C/fp: 0

c

• Fahrenheit: bp: 212

F/fp: 32

F -kelvin(absolute): bp:373/fp:273*F

Fahrenheit value:

F=9/5 C+32*

Celsius value:

C=5/9(

F-32)

Kelvin to Celsius:

K= C+273

Question 7: Effort

Answer:

-The force applied to a machine in order to do the work.-(FE)

Question 8: heat conduction

Answer:

the process of transferring heat by the flow of free electrons through a medium. eg. copper rod, silver, aluminum

Question 9: Uniformly accelerated motion

Answer:

Motion with constant acceleration. If an objects is allowed to fall freely near the surface of the earth( to fall w/ I it's initial velocity at zero & w/ no forces other than gravity acting on it) the acceleration of the object remains constant & is independent of the mass of the object.Avg. speed= distance covered/ time required

Question 10: Units of work

Answer:

-obtained by multiplying a unit of force by a unit of distance may be expressed in terms of the ft-lb, joule(Newton-meter) or the erg.

Question 11: Physical change

Answer:

Appearance change but chemical composition remains the same.

Question 12: Rapid oxidation/ burning

Answer:

When the combination of O2 with an element is so rapid that the release energy can be seen as light or felt as heat.

Question 13: Floride

Answer:

-Most active nonmetal -yellowish, highly poisonous and corrosive -when added to water hardens tooth enamel and reduces tooth decay

Question 14: heat radiation

Answer:

the process of transferring heat by a wave motion similar to light.The higher the temperature of an object the greater amount of heat it radiates.

Question 15: Newton law of universal gravitation

Answer:

• two object attract each other with a force that is proportional to the product of their masses and

inversely proportional to the square of the distance between them

• the earths attraction for injects is known as gravity

Question 16: Newtons 2nd law

Answer:

• F=ma

-if the net force acting in an object is not zero the object will be accelerated in the direction of the force.

• eg. A push that is enough it give a 3000 lbs van an acceleration of 4 ft/sec2 will be able to give 6000

lbs can an acceleration of 2 ft/sec2

Question 17: Length of the moment arm

Answer:

-the perpendicular distance from the fulcrum to the direction of the force.

Question 18: Types of machines

Answer:

-lever: is a rigid bar that is free to turn on or around a fixed point known as fulcrum/ pivot. E EA=L LA

-pulley: lifting heavy objects a considerable distance

-wheel and axle: the wheel is rigidly attached to an axle which turns with it. eg. steering in vehicle and door knob.

- inclines plane: is a flat surface with one end higher than the other.

-screw: used to connect one object to another.

wedge: may be thought of as a double inclined plane.

Question 19: Atoms

Answer:

-The smallest unit of an element that retains the general properties of that element.-has the same number of protons and electrons -valence electrons- borrow, lend or share electrons.-metals-if they lend electrons -inert- if they neither borrow or lend

Question 20: Molecule

Answer:

The smallest particle of a substance, having the physical and chemical properties of the substance.

Question 21: Newton 3rd law

Answer:

• when an object exerts a force on a second object, the second object exerts an equal and opposite

force on the first object.

• action= reaction
• principle under which rockets and jet aircrafts are built. As the hit gases exit the rear they exert a

forward push on the object from which they escape.