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1ST TERM FLASHCARDS > SCIENCE MIDTERM DECK > Flashcards

SCIENCE MIDTERM DECK Flashcards

1
Q

What is the first law of motion?

A

Law of Inertia

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2
Q

What do you call the tendency of an object to resist change or motion?

A

Inertia.

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3
Q

If there is more mass in an object, then there is (more/less) inertia.

A

more inertia.

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4
Q

What is the second law of motion?

A

Law of Acceleration

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5
Q

If you increase the force of an object, the acceleration will (increase/decrease).

A

increase.

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6
Q

If you increase the mass of an object, the acceleration will (increase/decrease)

A

decrease

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7
Q

If forces are balanced, then the acceleration is ____.

A

zero

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8
Q

In a formula triangle for acceleration, which one is on top? Force, Mass, or Acceleration?

A

Force.

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9
Q

What is the formula for acceleration?

A

Force over Mass (f/m)

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10
Q

What is the unit for force?

A

N

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11
Q

What is the unit for Mass?

A

Kg

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12
Q

What is the unit for Acceleration?

A

m/s^2

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13
Q

What is the third law of motion?

A

The action-reaction law

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14
Q

State the first law of motion.

A

“An object at rest stays in rest and an object in motion stays in motion.”

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15
Q

State the second law of motion

A

“The acceleration is directly proportional to the net force, in the same direction, and inversely proportional to the mass of the object”

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16
Q

State the third law of motion

A

“For every action, there is an opposite reaction”

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17
Q

What is sound?

A

Vibrating matter

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18
Q

Does sound require a medium to travel?

A

Yes.

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19
Q

Is there sound in space? Why or why not?

A

No, for there is no medium in space for sound to move, it is vacuum.

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20
Q

Which temperature does sound travel better in, higher temperatures or lower temperatures?

A

higher temperature

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21
Q

Which medium does sound travel faster in? Solid, liquid, or gas?

A

Solid

22
Q

What is the formula for the speed of sound?

A

V = 331m/s + (0.6m/s/c) x T

[ T = temperature, 331 and 0.6 are staple ]

23
Q

What is the speed of sound in 20 degrees celsius?

A

343 m/s

24
Q

What do you call the effect of change in wave frequency during relative motion?

A

Doppler Effect

25
Q

Which characteristic of a sound waves is defined as the ‘Energy in sound wave’

A

Loudness

26
Q

Which characterisitic of a sound waves is defined as ‘Measure of energy per unit’

A

Intensity

27
Q

Which characteristic of sound waves is defined as ‘Highness and lowness’

A

Pitch

28
Q

Which pitch is above human hearing? Ultrasonic or infrasonic?

A

Ultrasonic

29
Q

How many hertz for Infrasonic?

A

Less than 20Hz

30
Q

How many hertz for Ultrasonic?

A

Greater than 2000Hz

31
Q

Which characteristic of sound waves is defined as ‘harmonic content & dynamic characteristic of sound’

A

Quality/timbre ; allows ear to distinguish sound

32
Q

What is the formula of PE?

A

mgh (mass, gravity, height)

33
Q

What is the formula for KE?

A

(0.5)(mass)(v^2)

v = velocity

34
Q

what is the formula if we are finding for mass in PE?

A

PE/g x h

PE over gravity x height

35
Q

What is the law of conservation?

A

Energy can neither be created nor destroyed. It may only transform from one form to another. The total amount of energy remains the same

36
Q

What is the shortest wavelength in the electromagnetic spectrum?

A

Violet

37
Q

What has the highest frequency in the electromagnetic spectrum?

A

Red

38
Q

Gamma rays have shortest wavelength and highest frequency. T/F?

A

True

39
Q

Which color has the lowest energy?

A

Red.

40
Q

What is the formula for Work?

A

force x distance

41
Q

What is the formula for Distance?

A

Work / Force

42
Q

What is the formula for force?

A

work / distance

43
Q

What is negative workl?

A

performed if the displacement is opposite to the direction of the force

44
Q

What is the formula of power?

A

force x distance / time

45
Q

What is the formula for power if there is degree?

A

f x d x cos(degree) / time

46
Q

What is the difference of temperature and heat?

A

Temperature is the hotness/coldness and heat is the transfer of energy

47
Q

What is the unit for Heat?

A

Joules or Calories

48
Q

What is the unit for temperature?

A

Kelvin, fahrenheit, celsius

49
Q

What is specific energy?

A

Amount of energy required to raise the temperature of 1kg of substance by 1oC.

50
Q

What is the formula for heat energy?

A

Q = mass x specific heat capacity x (final time - inital time)

51
Q

What is thermodynamics?

A

A branch of physics that describes how thermal energy is converted to other forms of energy and how it affects matter

1ST TERM FLASHCARDS (3 decks)

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