What is the speed of a rocket that travels 9,000 meters in 12 seconds?
A. 0.001 seconds
B. 750 seconds
C.750 m/s
D. 108,000 m/s
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Answer:

Convection

Explanation:

conduction is like, electricity. radiation is like using a microwave.

Answer:

conduction

Explanation:

recall that conduction is the transfer of heat between objects that come in direcr contact.

You are putting heat directly on the part of the firework that allows it to spark, therefore it is conduction.

Convection takes place within a fluid.

Radiation is indirect heat through waves. (think of the sun warming us indirectly)

Answer:

Inverse relationships are common in nature. In electrostatics, the electrical force between two charged objects is inversely related to the distance of separation between the two objects. Increasing the separation distance between objects decreases the force of attraction or repulsion between the objects.

Explanation:

Two ways to decrease the electric force between two charged objects:

As a result of their electric charge, particles or objects are attracted to or repelled by the Coulomb force, also known as electrostatic force or Coulomb interaction. Charles-Augustin de Coulomb, a French scientist who published the findings of an experimental inquiry into the proper quantitative description of this force in 1785, gave the electric force its name. The electric force is one of the fundamental physical forces.

Positive or negative electric charges that are similar to one another repel one another in a straight line between their centers. Positive and negative charges that are opposite each other are drawn together along a straight line connecting their centers.

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Answer:

physical, social, and mental

Explanation:

Answer:

A,B,C

Explanation:

These three maintain the overall health of the person being. Take for instance an example a cake, it has layers that make the overall cake. So it is with the persons health, it takes all three of these feilds to make the overall health.

Answer:

Explanation:

It 100 kg It think

Answer:

D. Mass

hope it helps

Explanation:

Mass is commonly measured with a balance

Answer:

1, 3, 5,

Explanation:

A concave mirror is a hollowed sphere that has been cut into parts, each of which has a painted exterior. The plant's image has the qualities of a real, inverted, and smaller image. So, the correct options are A, C and E.

A hollow spherical formed into a mirror when the external surface of the each cut portion was painted, reflecting light from the interior surface. This kind of mirror is known as a concave mirror. When the concave mirror is placed too close to the item, a magnified and phoney image results.

This has an inward-curving reflective surface that faces away from the source of light. Light is reflected internally to a single focus point. Headlights on cars and torches are examples of concave mirrors. But, as the distance grows between the object and the mirror, the size of the image reduces and a real image is produced.

Thus, the correct options are A, C and E.

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Your question is incomplete, most probably the complete question is :

Leo places a plant in front of the center of curvature of a concave mirror. Which characteristics will the image of the plant have? Check all that apply.

Biker 1's acceleration:

(25 mph) / (3 s) = ((25 mi/h) • (1/3600 h/s)) / (3 s) ≈ 0.00231 mi/s²

Biker 2's acceleration:

(85 mph) / (8 s) = ((85 mi/h) • (1/3600 h/s)) / (8 s) ≈ 0.00295 mi/s²

Biker 2 has the greater acceleration.

Answer:

5 kg m/s

Explanation:

Because you need 5 N to push a 5 kg object so 5 will be left over

Answer:

 P /K = 1,997 10⁻³⁶  s⁻¹

Explanation:

For this exercise let's start by finding the radiation emitted from the accelerator

       [tex]\frac{dE}{dt}[/tex] = [tex]\frac{q^{2} a^{2} }{6\pi \epsilon_{o} c^{2} }[/tex]

the radius of the orbit is the radius of the accelerator a = r = 0.530 m

let's calculate

       \frac{dE}{dt} = [(1.6 10⁻¹⁹)² 0.530²] / [6π 8.85 10⁻¹² (3 108)³]

      P= \frac{dE}{dt}= 1.597 10⁻⁵⁴ W

Now let's reduce the kinetic energy to SI units

       K = 5.0 10⁶ eV (1.6 10⁻¹⁹ J / 1 eV) = 8.0 10⁻¹⁹ J

the fraction of energy emitted is

      P / K = 1.597 10⁻⁵⁴ / 8.0 10⁻¹⁹

      P /K = 1,997 10⁻³⁶  s⁻¹

Answer:

Explanation:

I hope this helps

Answer:

W = 30.38 N

Explanation:

Given that,

Mass of a rock, m = 3.1 kg

We need to find the weight of the rock on the surface of Earth. Weight of an object is given by :

W = mg

g is the acceleration due to gravity, g = 9.8 m/s²

W = 3.1 kg × 9.8 m/s²

= 30.38 N

So, the weight of the rock on the Earth is 30.38 N.

Answer:

Heyy!

Explanation:

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The first question's answer depends on what you mean by "sponge". If you're talking about sea sponges, then all but plastic are made up of cells. Some sponges used for cleaning are also made of plant material but also other, non-organic materials like dyes.

Cell walls are only present in plant cells, so they would be found in cork (derived from a certain tree bark), wood, and trees. Synthetic sponges made with plant material might also contain them, but they wouldn't be made entirely of cells with walls.

From given options or choices all are made up of cells except plastic and among the other four Cork, Sponge, Wood, and tree all show cell walls except Sponge.

A cell is the basic structural unit of all living organisms and contains various cell organelles. On the base of different cell organelles or presence or absence of the certain organelles help in distinct and divide the cell type.

The major types of cells are:

Plastic is not a living organism as there are no cells and is made up of polymers of hydrocarbon.

The cell wall is one of the major cellular structures that helps in identifying the type of cell organism and protects the organism from the external environment. It classifies the organism on its constituent of the cell wall.

In eukaryotic cells, animal cells have no cell wall, however, fungi cells, plant cells have a cell wall. A sponge is an animal and other cork wood, and trees are plants or plant-based products.

Thus, the sponge does not show the cell wall.

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Answer:

the third one

Explanation:

the 1991 eruption of mt. pinatubo was the scariest in history

Answer:

C

Explanation:

It is based on someone’s experience and how they felt about the accident

Answer:410.022779

Explanation: To figure out force, you use the equation F=MA. Well, in this case, you're trying to find M. The mass. All you have to do is rearrange. F=MA turns into A=F/M.

Answer:

W = 1418.9 J = 1.418 KJ

Explanation:

In order to find the work done by the pull force applied by Karla, we need to can use the formula of work done. This formula tells us that work done on a body is the product of the distance covered by the object with the component of force applied in the direction of that displacement:

W = F.d

W = Fd Cosθ

where,

W = Work Done = ?

F = Force = 151 N

d = distance covered = 10 m

θ = Angle with horizontal = 20°

Therefore,

W = (151 N)(10 m) Cos 20°

W = 1418.9 J = 1.418 KJ

Answer:Explanation:

Protons and neutrons have very similar mass, while electrons are far lighter, approximately 11800 times the mass. Protons are positively charged, neutrons have no electric charge, electrons are negatively charged. The size of the charges is the same, the sign is opposite.

Answer:

Bigger lenses are easier to manufacture and they produce less distortion.

Explanation:

A reflecting telescope is best used as a professional research telescope because " Bigger lenses are easier to manufacture and they produce less distortion."

This is evident in the fact that the mirror of a reflecting telescope is simpler and inexpensive to be manufactured.

Also reflecting telescope is known not to support chromatic distortion, which often is a byproduct of dispersion.

Answer:

Bigger lenses are easier to manufacture and they produce less distortion

Explanation:

Answer:

answer is C

Explanation:

i just took the test

Answer: tectonic plates

Explanation:

Answer:

D and E

Explanation:

They both produce a new object or substance afterwards.

Answer:

D. and E.

Explanation:

Hope this helps and I hope u have an Amazing day!!

Answer:

8.7kgm/s

Explanation:

Change in momentum=force×time

Answer:

A

Explanation:

Given that a stone dropped from the top of a 80m high building strikes the ground at 40 m/s after falling for 4 seconds. The stone's potential energy with respect to the ground is equal to its kinetic energy. (use 9 - 10 m/s)

O at the moment of impact

2 seconds after the stone is released after the stone has fallen 40 m

when the stone is moving at 20 m/s

At the top of the hill, the P.E = mgh

P.E = 10 × 80 × m

P.E = 800m

At the moment of impact, K.E = 1/2mv^2

K.E = 1/2 × 40^2 × m

K.E = 1/2 × 1600 × m

K.E = 800m

Since both P.E and K.E are the same, we can therefore conclude that the stone's potential energy with respect to the ground is equal to its kinetic energy at the moment of impact.

The correct answer is option A.

Answer:

rolling ball down a hill

Explanation:

A rolling ball has kinetic energy

Answer: An airplane has a large amount of kinetic energy in flight becuase of its large mass and fast velocity.

Explanation:

Answer: Converting people

Explanation: In Spanish colonies such as Florida, Spanish moved up into the other states to spread their christianity and were successful with doing so.

Answer:

a lever that is what is used