PHYSICS MIDDLE SCHOOL

Which labels best complete the diagram?Look at the diagram showing resistance and flow of
electrons.
OX: High resistance
Y: Low resistance
Z: Flow of electrons
X
N
X: Low resistance
Y: Flow of electrons
Z: High resistance
0 X: Flow of electrons
Y: High potential energy
Z: Low potential energy
X: Low potential energy
Y: High potential energy
Z: Flow of electrons

Answers

Answer 1

Answer:

Answer: D

Explanation: Look at the figure, we can conclude that the correct answer is

X: Low potential energy

Y: High potential energy

Z: Flow of electrons

Because electrons flow where there is difference in potential energy. And electrons move from a region of high potential energy to a region of low potential energy.

Since the arrow is pointing to X, that means

Z is the flow of electrons, X is of low potential energy and Y is of high potential energy.

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Carla pushes a toy car and lets it go. The toy car rolls and gradually comes to a stop. What would make the car stop?A. A force must be applied to the car in the direction opposite to that in which it is moving.B. A force must be applied pushing the car forward in the same direction as the moving car.C. A force must be applied in a direction pushing the car upward to make the car stop.D. A force must be applied in a direction pulling the car downward causing the car to stop.
A pair of speakers on two sides of a stage are playing identical pure tones. When you stand in the center, equally distant from the two speakers, you hear the sound loud and clear. Why does the intensity of the sound diminish considerable when you step off to one side?
Relative velocity.....Please help....
In what ways is climate controlled by the sun and the water cycle ?
Can someone help me on 2 science question,this is what they say1. A teacher challenges.students to study moon phases to determine if what they have learned from the textbook is accurate. How might a student investigate claims made in a textbook that moo. phases occur in a 28-day cycle?A. observe the phase of the moon each night until a full moon can be seen.B. Compare the textbook phases to the actual moon phases seen in the night sky each night in 28 days periods over a three month time frame.C. Compare diagrams of moon phases from the textbook to diagrams of moon phases on-lineD. Observe the moon phases seen in the night sky as often as possible over a six month period.2. What causes the apperance of the moon change overtime?A. The orbit of the Earth around the Moon and its distance from the sun.B.The Moons position relative to the sun and earth as it revolves around sun.C. the rotation of the moon on its axisD. The distance of the moon to the sunthank you

What is the acceleration of a vehicle that goes from 70 m/s to a stop in 35 s?

Answers

u=70 , v= 0, t=35, a=?
v=u+at
0=70+a(35)
-70=35a
a=-2m/s^2
Decelerate 2ms^-2 or acceleration is -2ms^-2

Why is foam a good insulator?

Answers

air or any sort of gas is not that good in conducting heat in relation to other materials.
since foam consists of many bubbles with trapped gas it both stops convection by simply being in position, and prevents conduction of heat through it, due to the gas inside

Answer: Foam is a good insulator for two reasons. First, it is filled with gas bubbles; gases conduct heat less effectively than either liquids or solids, and trapping the gas in small bubbles prevents the gas from effectively transferring heat via convection.

Explanation:

Hope this helps <3

Mass and weight are similar but not the same thing. In which of the following examples would the objects weight change, but made stay the same? An astronaut travels from the earth to the moon

A child grows taller

An overweight person goes on a diet

A snowball rolls downhill and picks up snow making it grow

Answers

we know that , weight of an object is given as

W = mg

where W = weight , m = mass of the object and g = acceleration due to gravity at that place.

An astronaut travels from the earth to the moon :

as the astronaut travels from the earth to the moon, the mass of astronaut stays the same but the weight change as acceleration due to gravity change since acceleration due to gravity on moon is only 1/6 times that on earth.

A child grows taller :

as child grows taller , he gains body mass . hence both mass and weight change.

An overweight person goes on a diet :

as an overweight person goes on diet , he loose body mass . hence both mass and weight change.

A snowball rolls downhill and picks up snow making it grow :

As snowball rolls downhill , it gains snow, hence its mass and in turn the weight change.

The refractive index of water with respect to vacuum is 4/3 and refractive index of vacuum with respect to glass is 2/3. If the speed of light in glass is 2x 108m/s, find the speed of light in i) Vacuum ii) water

Answers

As we know that

$\mu = (speed of light in air)/(speed of light in medium)$

now for the first part we know that

refractive index of vacuum with respect to glass is 2/3

speed of light in glass is $2 * 10^8 m/s$

now we will have

$(2)/(3) = (2* 10^8)/(c)$

$c = 3 * 10^8 m/s$

Part b)

Now similarly we can say

$\mu = (speed of light in air)/(speed of light in medium)$

here refractive index of water with respect to vacuum is 4/3

$(4)/(3) = (3 * 10^8)/(v)$

now we will have

$v = 2.25 * 10^8 m/s$

What is the difference between mass and weight in Physical Science?

Answers

Mass is a property of a lump of matter. It goes wherever the lump goes,
and it doesn't depend on what else may be nearby.

Weight is the force of gravity between a lump of matter and some other
mass. Since it depends on what else may be nearby, it can be different in
different places.

This is the correct answer in Physical Science. It's also the correct answer
in Biology, Math, Political Science, and Comparative Middle Eastern Religions.

mass is how much matter is in an object
wieght is a body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing.

What portion of the electromagnetic spectrum can human eyes detect? A.
visible light

B.
visible light and infrared light

C.
infrared light

D.
infrared light and ultraviolet light

Answers

Well, there's a very definite reason why a certain sliver of the electromagnetic
spectrum is called "visible".

The meaning of the word 'visible' is 'can be seen with eyes', and that's the label
given to the part of the electromagnetic spectrum that can be seen with eyes.
It doesn't include infrared or ultraviolet radiation, because those cannot be seen
with eyes. Only the 'visible' wavelengths can.

Answer:

visible light

Explanation:

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Contrast the movement of charges in a series circuit and in a parallel circuit.

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