Physical Science Midterm

A cart hanging from a spring scale has

2 forces, the force of the scale and gravity

A cart on a ramp rolling freely down the ramp woudl have (and do not ignore friction)

3 forces

A shallow inclined plane was better than a steep one because it required less _______, but, on the other hand, it was bad because it required more ______.

Force, energy

For a given wave in a given medium (sound in air or light in a vacuum, for instance) what happens when wavelength is increased?

Frequency decreases, Speed remains the same

2 identical guitars play 2 different notes on the same string, but play them equally loudly. The two sound waves produced would differ in (mark all that apply)

Frequency, Wavelength, Period

A cart in motion down the hall (with no one touching it) could have

Gravity, normal force, and a frictional force, and a slanted velocity graph

The complementary colors are

Green + magenta, red + cyan, yellow + blue

A statement predicting the outcome of an experiment, based off of other research.

Hypothesis

As you add more and more ropes to a pulley system, what SHOULD happen to friction?

It should increase

If you were accelerating (changing speed), what would your DISTANCE vs. TIME graph look like?

It would be curved

When the fan cart goes down, turns around, and comes back (or when the cart on the ramp goes up, turns around, and comes back down) right where it turns around

Its velocity is zero

Consider the toys that you played with at the end of the lab. Typically, after you did something to toy, then let it go. At this point (after you let it go) it will move and at this point it had

Kinetic Energy

States a relationship between quantities/variables (often as a mathematical equation).

Law

Red light plus blue light equals

Magenta Light

A red filter in line with a green filter would show ________ light through it

No light (black)

A red light in line with a magenta filter would show ________ light through it

Red

The primary colors of light are

Red, Green, Blue

Simple machines change:

The distance/speed of the force, The size of the force, The direction of the force

Explains how or why a phenomenon happens.

Theory

Light entering a more dense medium (such as Plexiglas from air) at an angle other than 900 will be bent

Toward the normal

Scientific laws may change with new discoveries.

True

A ball is thrown upwards into the air. We will call the part of its path going up (A), the top of its path (B), and its path down (C). The force of gravity is:

Virtually the same everywhere.

A piano and a guitar play the same note, the same loudness. The two waves would differ in

Waveshape

Red light plus cyan light equals

White Light

Sound travels better through

Wire

Consider the toys that you played with at the end of the lab. Where did the energy for those toys originate?

Work

Red light plus green light equals

Yellow Light

The primary colors of pigment are

Yellow, Cyan, Magenta

The distance vs. time graph of an object slowing down would look like

a curved line getting less steep

The distance vs. time graph of an object speeding up would look like

a curved line getting steeper

The velocity vs. time graph of an object moving with a constant speed in the positive direction (away from the detector) will be...

a positive horizontal line

A cyan filter in line with a magenta filter would show ________ light through it

blue

The steeper you made the inclined plane the _____________ the two works (workin and workout) got.

closer together

Waves colliding crest to crest make

constructive interference

Waves colliding crest to trough make

destructive interference

The velocity vs. time graph of an object speeding up in reverse (the negative direction)

diagonal down to the right, and in the negative

The position vs. time graph of an object moving with a constant speed in the positive direction (away from the detector) will be...

diagonal up to the right, and in the positive

A filter adds color to white light

false

WHILE the fan cart is BEING pushed so that it rolls backwards

force applied > force of fan

The property of light waves that leads to the phenomenon of color is

frequency

Relative to its object, a real image formed by a lens is always

inverted

Relative to its object, a real image formed by a mirror is always

inverted

Relative to its object, a real image formed by a lens may be

inverted, larger, or smaller

Relative to its object, a virtual image formed by a converging lens is always

larger and erect

The greater the decibel (dB) level of a sound wave, the

louder it is

The unit of speed you need to use in this class is

m/s

To produce a sound wave 1 octave higher, the length of the string should be

made 1/2 as long

A wave with a bigger amplitude should have _____________ energy than a smaller amplitude wave (assuming equal wavelength and frequency for both waves)

more than

A lens that produces a real upright image is a

neither converging or diverging

When a string has a fixed end, waves come back on the ____________ the side that they went down

opposite side as

When the American flag is viewed with red light it appears

red and black

The Force of gravity on an object near the surface of the earth:

remains virtually constant.

A pure musical note causes a thin wooden panel nearby to vibrate with the same frequency. This is an example of

resonance

When a string has a loose end, waves come back on the ____________ the side that they went down

same side as

As the frequency of a specific wave (sound, light, slinky at a fixed tension) is doubled, the wavelength (choose the BEST answer)

should half

As the wavelength of a specific wave (sound, light, slinky at a fixed tension) is doubled, the frequency (choose the BEST answer)

should half

Sound waves whose frequency is 300 Hz have a speed relative to sound waves in the same medium whose frequency is 600 Hz that is

the same

A wave with a bigger amplitude should have _____________ speed than a smaller amplitude wave (assuming equal wavelength and frequency for both waves).

the same as

A filter transmits the color that it is (and/or the colors that make it up).

true

The image formed by a diverging lens of a real object is always which one or more of the following?

virtual

Light entering a plexiglass rectangle at an angle

Bent twice in opposite directions (up then down or down then up), but by equal amounts

A blue light shone on a yellow object would show a ______ object.

Blue

In order to create a virtual image with a converging lens, the object must be placed relatively

Close to the lens

A converging mirror is

Concave

A diverging lens is

Concave

A converging lens is

Convex

A mirror that always produces an image on the opposite side of the mirror as the object is a

Diverging

Consider the toys that you played with at the end of the lab. Typically, after you did something to toy, but before you let it go, the toy was motionless. At this point, it had

Elastic potential energy

2 opposite forces always cancel out and cause no change in motion.

False

A simple machine that needs 10N to lift an 8N object, and needs 10J put in to get 8J out can not make your work easier.

False

If an object has 2 equal and opposite forces on it, it must be at rest.

False

If the Theory of Evolution and/or the Big Bang Theory had better support, then they would be laws.

False

Sound waves are transverse waves

False

Science prefers

A few powerful, general rules

2 identical guitars play the same note on the same string, but guitar A is played more loudly than guitar B. The two waves would differ in

Amplitude

In order for an object to start moving forward, the horizontal force applied must be bigger than

The force of friction