can someone please answer this, ill give you brainliest and your getting 100 points.

Answer:

Light gathering power is related to the area of the lens aperature:

Aa / Ab = (15 / 5)^2 = 9       since the area of an aperature is  proportional to the square of the radius

Answer:

Conduction, convection or radiation

Explanation:

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Here is your Answer:-

Heat flow relies heavily on the concept of conduction. Basically, the transfer of the heat energy relies on free electron diffusion. In order for the heat to move from one object or material to another, adjacent atoms vibrate against each other. This is caused by the electrons moving from one atom to another.

Answer:

answer below, like if this helps please.

Explanation:

A. If the slide became positively charged then that means the boy gained electrons. electrons can only move therefore when something becomes charged positively it is because of the transfer electrons.

B. the electrons go to the boy causing the slide to have more protons then the electrons.

Answer:

Energy transformation, also known as energy conversion, is the process of changing energy from one form to another

Explanation:

Explanation:

African and south American plate is correct

Answer:

15%

Explanation:

kinetic energy of the ball of mass 50 g and velocity of 300m/s is 22.5 J. The work done need to stop the ball is equivalent to its kinetic energy. Thus, 22.5 J of work done is needed.

The kinetic energy of an object is the energy generated by virtue of its motion. It is related to its mass and velocity by the expression written below:

Ke = 1/2 m v²

Thus, kinetic energy increases with mas and velocity.

Given that, mass of the ball = 50 g = 0.05 kg

velocity of  the ball = 30 m/s

then Ke = 1/2  × 0.05 kg × 30 m/s × 30 m/s = 22.5 J.

The energy of the body when it is moving is in the form of kinetic energy. This energy of the body is equivalent to the work done on the body to stope it. Therefore, work done on the ball needed to stop it is 22.5  J.

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I formulate a hypothesis based on their observations about what occurs when both the rock and the wood are submerged in water.

Density is defined as the mass per unit volume. It is an important parameter in order to understand the fluid and its properties. Its unit is kg/m³.

The mass and density relation is given as

mass = density × volume

I study if the volume or density of items determines whether solid objects float or sink in water in this scientific inquiry I did the experiment of density, mass, and volume using a rock and a standard-shaped piece of wood.

It is critical that the chosen piece of wood is larger than the rock and that the rock be tiny enough to fit inside the measuring cylinder. I see both the rock and a chunk of wood.

Hence I formulate a hypothesis based on their observations about what occurs when both the rock and the wood are submerged in water.

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Answer:

the reflection of the candle in the concave mirror formed upside down real image that is diminished

Answer:

pacific and Australian

Explanation:

a covergent boundary is when to plates move towards eachother and the arrows show that the arrows are facing each other

Answer:

Pacific and Australian

Explanation:

Convergent boundaries are where two plates come together. Either tall mountains are formed on land or deep trenches in the ocean. There are deep ocean trenches where the Pacific and Australian plate converge.

Answer:

yes, radio waves and x-rays are type of light.

Answer: its D

Explanation:

because the car is pulling it(trailer) to the left not the right

Answer:

A. aluminum

Explanation:

because it's metal

Answer:

D or A

Explanation:

WHEN YOU PLACE A MAGNET CLOSE TO AN IRON MATERIAL IT INSTANTLY COMES TO IT

Answer:

1500

Explanation:

because it takes 1 calorie to raise one gram of water to one degree Celsius.

Answer:

Explanation:

Eclipse happens when a large object gets in the way of another object; casting its shadow over it.

Solar eclipse happens when the moon get in between the sun and earth. It blocks sun light and causes its shadow over the sun as seen from earth.

Lunar eclipse happens when the earth is in between the sun and moon. It blocks sun light from reflecting off the moon surface so there is a shadow on the moon as seen from earth.

Answer:

In energy terms, electrical potential energy in the battery is converted into kinetic energy of moving electrons.

Explanation:

Answer:

Zeros that follow non-zero numbers and are also to the right of a decimal point are significant.

Explanation:

For example:

0.300 has 3 significant figures.

5.400 has 4 significant figures.

Answer:

10 m/s

Explanation:

u of cue ball = 10 m/s

u of eight ball=0m/s

m of cue ball =0.16 kg

m of eight ball =0.16 kg

According to law of conservation of momentum

Momentum before collision = Momentum after collision

so

( m of cue ball X velocity of cue ball) + ( m of eight ball X velocity of eight ball)= (m of cue ball X velocity of cue ball after collision )+( m of eight ball X velocity of eight ball after collision)

thus

(0.16 X 10)+(.016 X 0)= (0.16 X 0)+ ( 0.16 X velocity of eight ball after collision)

1.6= 0.16 X velocity of eight ball after collision

1.6÷0.16= velocity of ball after collision

10= velocity of eight ball after collision

Answer:

A.) Hot to cold.

Explanation:

I took the quiz on Edge, 2022.

(See the attachment below.)

Hope this helped! <3

Based on scientific information, the direction that heat generally flow from is: A. hot to cold.

Heat is also known as thermal energy and it refers to a form of energy that is only transferred from an object to another due to a difference in temperature.

During the process of heat conduction, heat would only be transferred between objects that are having different levels of temperature and objects that are directly in contact with one another.

In conclusion, heat is generally transferred from a hot object to a cold object as a result of their varying temperature.

Read more on heat here: brainly.com/question/12072129

Question :-

Answer :-

[tex] \rule {180pt} {2pt} [/tex]

Given :-

To Find :-

Solution :-

As per the provided information in the given question, Initial Velocity is given 0 m/s . Acceleration is given 2 m/s² . Displacement is given 9 m . And, we have been asked to calculate the Final Velocity .

For calculating the Final Velocity , we will use 3ʳᵈ Equation of Motion :-

Where ,

Therefore , by Substituting the given values in the above Equation :-

[tex] \longmapsto \: \: \sf {ᴠ ^{2} \: - \: ᴜ ^{2} \: = \: 2 \: \times \: ᴀ \: \times \: s} [/tex]

[tex] \longmapsto \: \: \sf {ᴠ ^{2} \: - \: 0 \: = \: 2 \: \times \: 2 \: \times \: 9} [/tex]

[tex] \longmapsto \: \: \sf {ᴠ ^{2} \: - \: 0 \: = \: 36} [/tex]

[tex] \longmapsto \: \: \sf {ᴠ ^{2} \: = \: 36} [/tex]

[tex] \longmapsto \: \: \sf {ᴠ \: = \: \sqrt { \: 36 \: }} [/tex]

[tex] \longmapsto \: \: \textbf {\textsf {ᴠ \: = \: 6}} [/tex]

Hence :-

[tex] \underline {\rule {180pt} {4pt}} [/tex]

After years of observation, Hubble made an extraordinary discovery. In 1923 he spotted a Cepheid variable star in what was known as the Andromeda Nebula. Using Leavitt's techniques, he was able to show that Andromeda was nearly 1 million light years away and clearly a galaxy in its own right, not a gas cloud.

Answer:

did you ever get the answer

The current in the wire has created a magnetic field with its north pole at the top of the rod. This is because the magnetic field influences electric currents. Thus, the correct option is C.

A magnetic field is a vector field which describes the magnetic influence on a moving electric charge, electric current, and magnetic material. A moving charge in a magnetic field which is experienced a force perpendicular to the own velocity and to the magnetic field.

The magnetic field is also referred to as the field where magnetic forces act to shape an electrical current. The only material or body which is capable of altering an electrical current in a magnetic field is the presence of another magnetic field in the space.

Therefore, the correct option is C.

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Answer:

the answers would be D: all the above

Answer:

C

Explanation:

the reason is because both magnets and electric charges have both North and south poles

and like poles of both magnets and electric charges repel from eachother while unlike charge repel

pls give brainliest

Answer:

1. The reason why a plane mirror forms a virtual image is because it doesn't let the light go through it, but it reflects the light, so if you go behind the plane mirror, then you won't see the rays of light since it's not letting the rays of light go behind it.

2. The image cannot be projected onto a screen also.

3. Also, the Rays of light never meet at a focus point, so hence, this is why the plane mirror forms a virtual image.

Thanks!

Answer:

becaise the light does not actually pass through the image

Acceleration is the rate at which velocity changes.

1. The 2 cars will repel because both are S. Note: like poles repel

2. Magnetic force is being exerted between the 2 magnets