The earth has a circumference of about 25000 miles. How is it expressed in scientific notation?

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Answer 1

Answer: 2.5 * 10^4 miles

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Related Questions

Why would you expect sodium (Na) to react strongly with chlorine (Cl)?1. They both need to lose one electron. 2. They both need to gain one electron. 3. Sodium needs to lose one electron, and chlorine needs to gain one electron. 4. Sodium needs to gain one electron, and chlorine needs to lose one electron.
a magnet is pushed into the center of a wire loop and then stops. what is the current in the wire loop when the wire stops moving? explain.
Why do the kites and eagles fly without flapping their wings?
Explain convection in as little as possible
Please help me i need it it’s the only way i’ll pass

Two students grab a slinky and start waving it up and down. A third student counts the number of waves that pass by every second and measures the distance between the wave peaks. This data is recorded and a graph is made to show the results.Determine the velocity of the wave produced.

A) 1 m/s

B) 2 m/s

C) 3 m/s

D) 6 m/s

Graph Attached*

Answers

Velocity = frequency * wavelength

v = fλ

Just pick any points on the graph for frequency f and corresponding λ

Taking the first red point at the top.

λ = 6m f = 1 Hz

v = 6 * 1

v = 6 m/s

D.

Alpha particles \ beta particles / gamma radiation Put these different types of radiation in order from MOST to LEAST penetrating.

Answers

It goes: Gamma radiation > beta particles > alpha particles

Answer:

Gamma > Beta > Alpha

Explanation:

What function does a generator perform inside a power plant?A.The generator stores electrical energy for later use in homes and businesses.

B.The generator transforms the mechanical energy of the turbine into electrical energy.

C.The generator spins the turbine to create mechanical energy.

D.The generator spins the turbine to create electrical energy.

Answers

The generator is called a 'generator' because it 'generates' something
that wasn't there before.

The power plant uses water, steam, or wind, to spin a turbine, and
the generator transforms the mechanical energy of the turbine into
electrical energy (which wasn't there before). (Choice-B)

B. The generator transforms the mechanical energy of the turbine into electrical energy.

Note that a generator uses mechanical energy to turn the wire loop in the magnetic field. This causes electric current to flow, creating electrical energy.

Make a island with all renewable energy soursws and how it works and about it but at year 9 level

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Answer:

How are we expected to make an island

The acceleration due to gravity for an object on the surface of the Earth is g. The distance from the Earth to the Moon is roughly 60 RE, where RE is the radius of the Earth. What is the centripetal acceleration of the moon during its (roughly circular) revolution around the Earth

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Answer:

The centripetal acceleration that the moon experiences will be almost equal to the gravitational force that the Earth does in the moon,

Now, remember these two things:

F = m*a

and Fg = G*M1*M2/r^2

the first equation says that the force applied to something is equal to the mass of the object times the acceleration.

The second equation is for the gravitational force, where G is a constant, M1 and M2 are the masses of both objects, in this case, the Earth and the moon, and r is the distance.

We know that the acceleration in the surface of the Earth is:

a = Fg/M2 = g = G*M1/(RE)^2

now, for the moon we will have:

a = G*M1/(60RE)^2 = (G*M1/(RE)^2) *(1/60^2)

Here the term in the left is equal to g, so we have:

(G*M1/(RE)^2) *(1/60^2) = g*(1/60^2)

So the centripetal acceleration of the moon is 60^2 = 3600 times smaller than g.

Could a vector ever be shorter than one of its components? Equal in length to one of its components? Explain.

Answers

It can never be shorter than a component - magnitude of a vector is the square root of the sum of the components squared, and a square function never produces a negative number. However, it can be the same size as it's component, if that component is the only one.

Answer:Consider the graph and equation, y = 3x, that represent Alonso’s walking speed. What relationship is represented by this equation and graph? What would the points (3, 9) and (5, 15) represent?

Explanation:

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In scientific terms, how is power related to work? A.Power is the ability to do work. B.Power is the force of work over a certain distance. C.Power is the rate at which work is accomplished. D.Power is the energy supplied in a force.

Answer to number 8 please

If you observed that an em wave had a wavelength of 10-12m, what sort of wave is it?