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SCEN > Cumulative "Big" Ideas > Flashcards

Cumulative "Big" Ideas Flashcards

1
Q

Which has a greater momentum: an automobile at rest or a moving skateboard?

A

A moving skateboard because it has speed.

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1
Q

Low specific heat requires a ________ amount of heat to change temp.

A

small

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1
Q

In longitudinal waves, wave direction is the _______ as the direction of wave travel.

A

SAME

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2
Q

_______ is the thermal energy that flows from substances of high to low temp.

A

Heat

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3
Q

The Condition of Equilibrium applies when:

  • objects are at rest
  • objects are moving in a straight line
  • objectives are moving at constant speed in a circular path
A

^^^

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4
Q

You must have what for a circuit?

A

A complete loop

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5
Q

A billiard ball and bowling ball have the same speed. Compared with the heavier bowling ball, the lighter billiard ball has:

A

less momentum and less kinetic energy

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6
Q

Conservation of Energy Lab

A

Finding the spring’s constant in froggy pop ups.

The potential energy is stored in the spring when it is compressed, but when the froggy pops up, it is converted into gravitational potential energy.

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7
Q

In transverse waves, wave motion is _________ to the direction of wave travel.

A

perpendicular

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8
Q

What name is given to the property to which objects resist changes in motion?

A

Inertia

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9
Q

The fact that only some wavelengths get through a stained glass window is an example of selective ____________.

A

transmission

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10
Q

The transfer of thermal energy in a gas or liquid by means of currents in the heated fluid is ________.

A

convection

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11
Q

Like poles _______ opposite poles _______.

A

repel, attract

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12
Q

How does the direction of a friction force compare with the direction of the velocity of a sliding object?

A

The two are in opposite directions; friction opposes motion.

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12
Q

As a rocket gets further from Earth, the strength between the rocket and the Earth _________.

A

DECREASES

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12
Q

No system can reach absolute zero.

A

3rd Law of Thermodynamics

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13
Q

Gravity Lab

A

Longer length of the pendulum swinging is more accurate. By it being longer, it provides a better angle, enabling the pendulum to interact with more of earth’s gravity.

14
Q

Longer wire, smaller area, and higher temp have ________ resistance to flow.

A

HIGHER

15
Q

High specific heat requires a _______ amount of heat to change temp.

A

LARGE

17
Q

Solid to gas directly is _______.

A

sublimation

18
Q

Heat NEVER spontaneously flows from cold to hot.

A

2nd Law of Thermodynamics

19
Q

What does it mean to say momentum is conserved?

A

When momentum does NOT change, we say it is conserved.

20
Q

Shorter wire, larger area, and lower temp have ________ resistance to flow.

A

LOWER

21
Q

When the speed of a fluid increases, internal pressures in the fluid decrease.

A

Bernoulli’s Principle

22
Q

The transfer of energy by means of electromagnetic waves is ________.

A

radiation

24
Q

The transfer of thermal energy by molecular and electron collisions within a substance is __________.

A

conduction

26
Q

A change in pressure at any point in an enclosed fluid at rest is transmitted undiminished to all points in the fluid.

A

Pascal’s Principle

27
Q

Newton’s 1st Law of Motion

A

Every object continues at rest or in a straight line until acted upon by force.

27
Q

The greater the masses, the ________ force of attraction between them.

A

GREATER

28
Q

A bowling ball sits at rest and another bowling ball rolls down a lane at constant speed. Which ball is in equilibrium?

A

Both. Because both are NOT accelerating.

29
Q

An immersed body is buoyed up by a force equal to the weight of the fluid it displaces.

A

Archimedes’ Principle

30
Q

Sound is composed of ______ waves, while light is composed of ______ waves.

A

longitudinal, transverse

32
Q

When is energy most evident?

A

When it is changing!

34
Q

Energy cannot be created or destroyed, it can change forms, but the total is constant.

A

1st Law of Thermodynamics

35
Q

You hear an “echo” from a dolphin. Your friend also hears an “echo,” but from a bat.

Both you and your friend are witnessing ________ of sound.

A

reflection

36
Q

Compare and Contrast Sound and Light.

A
  • Both transfer energy
  • Sound waves require a medium, while light waves don’t.
  • Sound is composed of longitudinal waves, while light is composed of transverse waves.
37
Q

DC goes in _______ direction.

A

1

38
Q

Newton’s 3rd Law of Motion

A

To every action there is always an equal and opposite reaction.

39
Q

The acceleration produced by a net force on an object is directly proportional to the net force, is in the same direction as the net force, and inversely proportional to the mass of the object.

A

Newton’s 2nd Law of Motion

40
Q

Average kinetic energy describes __________.

A

temperature

SCEN (6 decks)

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