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SEMESTER EXAM Flashcards

1
Q

Density equation?

A

Mass over velocity

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2
Q

Force equation?

A

Mass times acceleration

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3
Q

Kinetic energy equation??

A

1/2 mass times velocity squared

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4
Q

Mechanical advantage equation?

A

Output over input

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5
Q

Momentum equation??

A

Mass times velocity

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6
Q

Power equation??

A

Work over distance

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7
Q

Velocity equation??

A

Distance over time

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8
Q

Speed equation?

A

Absolute value of distance over time

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9
Q

Weight equation??

A

Mass times gravity

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10
Q

Work equation??

A

Force times distance

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11
Q

What is acceleration?

A

It specifies how rapidly the velocity of an object is changing

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12
Q

What is angular momentum?

A

How many times an object revolves per the time, it is dependent on a frame of reference; revolution

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13
Q

What is tangential velocity?

A

The velocity coming off an object rotating; dependent on distance from axis and angular velocity

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14
Q

Why can’t you see atoms with a light microscope?

A

The wavelength of the atom is longer than that of light

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15
Q

What is the plum pudding model?

A

A positively charged nucleus w/ negatively charged electrons inside

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16
Q

What is the Rutherford model?

A

A positively charged nucleus with electrons orbiting it and empty space in between

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17
Q

What is the Bohr model?

A

Electrons orbit the nucleus in a path depending on their energies

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18
Q

Modern atom model?

A

Electrons may or may not exist but if they do they exist in orbitals; a cloud of probability

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19
Q

What is center of gravity?

A

The points that force of gravity is considered to act; gravity can be different at different parts of an object; the point it revolves around

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20
Q

What are elements defined by?

A

The # of protons they have

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21
Q

What is free fall?

A

When gravity is the only force acting on an object it is in “free fall”

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22
Q

What is friction?

A

The force that resists relative motion

23
Q

What is the inverse squared law?

A

As the gravitational force increases the inverse squared law is used to determine the increase

24
Q

What is kinetic energy?

A

Energy while in motion

25
What are types of kinetic energy?
Thermal, electrical, electromagnetic, elastic(while in motion)
26
What is mass?
It determines the strength of resistance to motion; the more mass the more resistance
27
What is force?
A push/ pull on an object; cause it to move
28
What is newton's 1st law of motion?
An object remains in motion or at rest unless a force moves it/stops it AKA inertia More mass=more inertia Less mass=less inertia
29
What is newton's 2nd law?
The force is equal to the objects acceleration times mass
30
What is Newton's third law?
For every action there is an equal and opposite reaction | AKA momentum
31
Acceleration equation?
Change in velocity over change in time
32
What is a solid?
It has the least amount of energy and is confined by electrostatic attraction (Standing at desk)
33
What is a liquid?
Less confined; gravity keeps it together; forms to fit container (Line against back counter)
34
What is a gas?
Gas:spread out in order to be as far apart as possible | Moves slowly around container
35
What is plasma?
It has the most energy; most common; ionized gases | Moving quickly around container
36
What is the curvature of space time caused by?
The momentum/energy of the matter
37
The speed of light is??
Constant
38
What are he postures of relativity?
The laws of physics are the same no matter the reference frame, the speed of light is the same for all observers
39
Does simultaneousness exist?
No, we only see things as happening at one time in certain reference frames
40
At relative speeds observers inside experience time
Slower
41
Objects moving at relativistic speeds appear
Shorter than slow moving objects
42
L prime= | L=
L prime=outside | L=inside
43
T prime= | T=
T prime= outside | T=person in the action
44
The closer you get to the speed of light, mass is
Increased
45
Work is what kind of force?
A vector force
46
What is a vector?
The direction of travel; either positive or negative
47
What is speed?
How far an object travels in a given time interval no matter the direction
48
What is velocity?
It refers to the maginitude and direction | It's a vector!!
49
What is work?
The force applied to move an object
50
What is rotation?
An object turning about an inside axis | Aka spin!!
51
Gravity is
9.8 m/s
52
To have momentum an object must have
Mass and velocity
53
Something that has kinetic energy has
Momentum

Physics (10 decks)

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