Physics

Question 1

Angstrom (Å)

Answer 1

1Å=10^-10

Question 2

Nanometer (nm)

Answer 2

1 nm = 10^-9m

Question 3

Electron volt (eV)

Answer 3

Represents the energy acquired by an electron accelerating thru a potential difference of 1 volt

1 eV = 1.6 x 10^-19 J

Question 4

m =

Answer 4

10^-3

Question 5

k =

Answer 5

10^3

Question 6

M =

Answer 6

10^6

Question 7

n =

Answer 7

10^-9

Question 8

Giga (G or B)

Answer 8

10^9

Question 9

mega (M)

Answer 9

10^6

Question 10

Kilo (k)

Answer 10

10^3

Question 11

Centi (c)

Answer 11

10^-2

Question 12

Milli (m)

Answer 12

10^-3

Question 13

Micro

Answer 13

10^-6

Question 14

Nano

Answer 14

10^-9

Question 15

Pico (p)

Answer 15

10^-12

Question 16

Sin

Answer 16

y/h = opposite side/hypotenuse

Question 17

Cos

Answer 17

x/h = adjacent side/hypotenuse

Question 18

Tan

Answer 18

y/x = opposite side/hypotenuse

Question 19

Scalars

Answer 19

Numerical quantities that have magnitude but no direction such as distance, speed, and mass

Question 20

Vector

Answer 20

Quantities have both magnitude and direction like displacement, velocity, and force

Question 21

Resultant of vectors

Answer 21

The sum of 2+ vectors

Question 22

Displacement (delta x)

Answer 22

Vector quantity that describes the change in position of the object

Has both direction & magnitude and

Question 23

Average velocity

Answer 23

The ratio of the displacement vector over the change in time

v=(delta x)/(delta t)

v has the same direction of delta x

Question 24

Instantaneous velocity

Answer 24

Aka velocity

Refers to a single instant of time

Average velocity as delta t approaches 0

The graph of this is defined as the slope of the graph of the object’s position with respect to time at the particular time, t

Question 25

Average speed

Answer 25

s=d/(delta t)

d is the distance traveled (scalar)

Not always the same as the magnitude of the average velocity

Question 26

Instantaneous speed

Answer 26

Magnitude of the instantaneous velocity vector

A scalar

Question 27

acceleration

Answer 27

rate of change of an object’s velocity

a vector

Question 28

average acceleration

Answer 28

change in instantaneous velocity over the time period delta t

a=(delta v)/(delta t)

Question 29

instantaneous acceleration

Answer 29

the acceleration at one point of a particle’s path

average acceleration as delta t approaches 0

slope of the line giving the object’s velocity w/ respect to time at a particular time, t

Question 30

motion w/ constant acceleration

Answer 30

the acceleration of a body is proportional to the net force applied to the body

when body is under the influence of a constant force, the acceleration is also constant

Question 31

linear motion

Answer 31

acceleration and velocity vectors are along the line of motion

Question 32

projectile motion

Answer 32

object has velocity and position components in both the vertical and horizontal directions