Physics

Question 1

What is momentum?

Answer 1

quantity that describes an object’s resistance to stopping

Question 2

What is the equation for momentum?

Answer 2

P = mv (momentum is equal to mass times velocity)

Question 3

Impulse

Answer 3

change in momentum or quantity that describes the effect of a net force acting on an object

Question 4

What is the equation for Impulse?

Answer 4

J = Force x change in time

Question 5

What is elastic collision?

Answer 5

resulting in moving in opposite directions after colliding

Question 6

What is inelastic collision?

Answer 6

resulting in sticking together after colliding

Question 7

What is the Law of Conservation of Momentum?

Answer 7

momentum is always conserved in any time of collision (m1v1i + m2v2i = m1v1f + m2v2f)

Question 8

What is the equation for waves?

Answer 8

speed = frequency x wavelength

Question 9

What are the parts of the wave?

Answer 9

crest, trough, intensity, wavelength, amplitude, nodes

Question 10

What doesn’t change within the electromagnetic spectrum?

Answer 10

speed

Question 11

What will the image formed by convex mirror and concave lens be? [diverging]

Answer 11

virtual, upright and reduced

Question 12

What is the difference of diverging convex mirror and concave lens? [diverging]

Answer 12

convex mirror is one curve while concave lens is two

Question 13

What will the image formed by convex lens and concave mirror be? [converging]

Answer 13

virtual, upright and enlarged; real, inverted, enlarge, same sized or reduced

Question 14

What is the difference of diverging convex lens and concave mirror? [converging]

Answer 14

convex lens is two curves while concave mirror is one

Question 15

Example of concave lens

Answer 15

myopia (near-sightedness)

Question 16

Example of convex lens

Answer 16

hyperopia (far-sightedness)

Question 17

What is the difference of sound waves and light waves?

Answer 17

sound waves are longitudinal and need a medium to travel while light is an electromagnetic wave which can travel w/o a medium

Question 18

Speed of light in gas and solid?

Answer 18

Speed in gas is faster than speed in solid so angle is also greater in gas

Question 19

What is equation of pressure?

Answer 19

Pfluid = density x gravitational acc. x height

Question 20

What is the equation of fluid continuity?

Answer 20

flow rate = volume of fluid/time elapsed

Question 21

What is the Ideal Gas Law?

Answer 21

PV = T

Question 22

What is Charles’ Law?

Answer 22

increase in V = increase in T with constant pressure

Question 23

What is Boyle’s Law?

Answer 23

increase in P = decrease in V with constant pressure with constant temp

Question 24

Gay-Lusaac’s Law?

Answer 24

increase in P = increase in T with constant pressure with constant volume

Question 25

What is Thermodynamics?

Answer 25

heat is transferred from hot body to cold body to achieve thermal equilibrium

Question 26

What is the equation for thermodynamics?

Answer 26

Q = mass x specific heat x change in temp or Q = mass x latent heat

Question 27

What is specific heat?

Answer 27

heat required to change temp

Question 28

What is latent heat?

Answer 28

heat required to change phase

Question 29

What is the zeroth law of thermodynamics?

Answer 29

thermal equilibrium

Question 30

What is the first law of thermodynamics?

Answer 30

conservation of energy; Qgained = Qlost

Question 31

What is the second law of thermodynamics?

Answer 31

entropy tends to increase (hot to cold)

Question 32

What is the third law of thermodynamics?

Answer 32

absolute zero temperature is unattainable

Question 33

What is convection

Answer 33

process of heat transfer between a solid surface and a fluid (liquid or gas) in motion

Question 34

What is conduction?

Answer 34

process of heat transfer that occurs when there is a temperature difference between two objects or regions, and heat energy is transferred through direct contact

Question 35

What is radiation?

Answer 35

emission or transmission of energy in the form of electromagnetic waves or particles

Question 36

What is Ohm's Law?

Answer 36

Voltage = IR (current x resistance)

Question 37

What is voltage?

Answer 37

electromotive force or potential difference that would drive 1A of current against 1 ohm resistance

Question 38

What is current?

Answer 38

flow of electrical charge carriers; electrons or electron-deficient atoms

Question 39

What is resistance?

Answer 39

measure of difficulty to pass an electric current through that conductor

Question 40

What is the voltage trend in series and parallel circuits?

Answer 40

in series, voltage is additive while equal or constant all throughout in parallel

Question 41

What is the current trend in series and parallel circuits?

Answer 41

in series, current is equal or constant all throughout while additive in parallel

Question 42

What is the resistance trend in series and parallel circuits?

Answer 42

in series, resistance is additive while in parallel, their reciprocal is additive