Chapter 1

Question 1

Mass

Answer 1

amount of matter in object (measured in grams or kilograms)

Question 2

Force

Answer 2

any influence that causes change in object: change in speed,direction, shape.

Question 3

Weight

Answer 3

force of gravity on object; related to object’s mass

Question 4

Volume

Answer 4

quantity of three-dimensional space occupied by a liquid, solid, or gas

Question 5

Density

Answer 5

mass of a substance per unit volume

Question 6

Velocity

Answer 6

mass of a substance per unit volume

Question 7

Momentum

Answer 7

mass times velocity of an object during motion

Question 8

Acceleration

Answer 8

Acceleration of an object is directly proportional to the force applied and inversely proportional to object’s mass

Question 9

Intertia

Answer 9

object’s resistance to changes in state of its motion or rest

Question 10

Elasticity

Answer 10

is property of an object to return to its original shape after it has been deformed by an external force. External force is called stress

Question 11

Stiffness

Answer 11

resistance of elastic body to deformation by external force

Question 12

Work

Answer 12

force exerted over a distance

Question 13

Energy

Answer 13

ability to do work (there is electrical energy and sound energy, etc)

Question 14

Power

Answer 14

rate of work done or energy used in a period of time. Measured in watts

Question 15

Intensity

Answer 15

power per unit of area. Measured in watts per square meter in MKS and watts per square centimeter in CGS system

Question 16

Pressure

Answer 16

force acting perpendicularly on a specific surface area

Question 17

Sound

Answer 17

occurs when a disturbance creates changes in pressure in a gas, liquid, or solid

Question 18

Air Pressure

Answer 18

pressure is force acting perpendicularly on a surface (like your eardrum)