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kow [346]
2 years ago
5

Is the speed of Earth revolving around the sun changing?

Physics
2 answers:
aleksandr82 [10.1K]2 years ago
6 0

Answer: First of all, I cannot give you a precise answer, because the speed of the Earth changes all the time as the Earth moves around the Sun. This is because Kepler's second law says that on its orbit, a planet will sweep equal areas in equal amounts of time.

borishaifa [10]2 years ago
5 0

Answer:

30 kilometers per second

Explanation:

the surface of the earth at the equator moves at a speed of 460 meters per second--or roughly 1,000 miles per hour.  It covers this route at a speed of nearly 30 kilometers per second, or 67,000 miles per hour.

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If we add 50 Joules of thermal energy to a heat engine, and that heat engine does 30 Joules of work, how much thermal energy is
Natalka [10]

Answer:

The correct answer should be

A. 20 Joules

Explanation:

I'm taking the K12 Unit Test: Energy - Part 1 right now

7 0
2 years ago
Fifteen grams of substance X at 95 degrees Celsius is mixed with 45 grams of substance Z at 85 degrees Celsius in a container wh
Viefleur [7K]
According to the Law of Conservation of Energy, energy is neither created nor destroyed. They are just transferred from one system to another. To obey this law, the energy of the substances inside the container must be equal to the substance added to it. The energy is in the form of heat. There can be two types of heat energy: latent heat and sensible heat. Sensible heat is energy added or removed when a substance changes in temperature. Latent heat is the energy added or removed at a constant temperature during a phase change. Since there is no mention of phase change, we assume the heat involved here is sensible heat. The equation for sensible heat is:

H = mCpΔT
where
m is the mass of the substance
Cp is the specific heat of a certain type of material or substance
ΔT is the change in temperature.

So the law of conservation of heat tells that:

Sensible heat of Z + Sensible heat of container = Sensible heat of X

Since we have no idea what these substances are, there is no way of knowing the Cp. We can't proceed with the calculations. So, we can only assume that in the duration of 15 minutes, the whole system achieves equilibrium. Therefore, the equilibrium temperature of the system is equal to 32°C. The answer is C.
5 0
3 years ago
What is the energy of moving electrical charges
Simora [160]
The energy of moving electrical charges is Electrical energy



Hope its the answer you are finding and hope it helps....
3 0
2 years ago
Which are uses for clay?
Nesterboy [21]

Answer: Uses of clay are as follows.

  • Ceramics
  • Tile
  • Pottery
  • China dishes

Explanation:

Clay is a type of soil whose sediment consists of particles smaller than slit, that is, around 0.004 mm. This means that particles of a clay are very small.

A clay is soft and can be molded to different shapes easily.

Some uses of clay are as follows.

  • It is used to make ceramics.
  • It is used to make pottery like clay pot to store water in summers.
  • It is also used to make tile and china dishes.  

5 0
2 years ago
What is required to specify the position of an object?(๑•ᴗ•๑)♡​
Mkey [24]

Answer:

Explanation:

To describe the motion of any object, we must be able to describe its position x. It reflects it at any particular time. In other words, we need to specify its position relative to the conventional frame of reference.


I hope it helps! ≧◉◡◉≦

8 0
2 years ago
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