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2 years ago

Is the speed of Earth revolving around the sun changing?

2 answers:

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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A hydrogen atom has a diameter of about 12.7 nm, express this diameter in centimeters.

Andrej [43]

1 meter = 1e9 nm
To get meters, divide nanometers by 1e9: 9.95nm / 1x10^9 = 9.95x10^-9 meters
Answer: 9.95e-9 meters

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2 years ago

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Hey what is you answering streak and what fact dose it say

Valentin [98]

Answer:

It’s 53:) Or - quit

Explanation:

That’s my strong streak

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2 years ago

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You throw a glob of putty straight up toward the ceiling, which is 3.50 mm above the point where the putty leaves your hand. The

LuckyWell [14K]

Answer: $4.65\ m/s$

Explanation:

Given

Distance putty has to travel is 3.5 m

The initial speed of putty is 9.50 m/s

Using equation of motion to determine the velocity of putty just before it hits ceiling

$v^2-u^2=2as$

$\Rightarrow v^2-(9.5)^2=2(-9.8)(3.5)\\\\\Rightarrow v^2=9.5^2-68.6\\\Rightarrow v=\sqrt{90.25-68.6}\\\Rightarrow v=4.65\ m/s$

So, the velocity of putty just before hitting is $4.65\ m/s$

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2 years ago

A massive tractor rolls down a country road. in a perfectly inelastic collision, a small sports car runs into the machine from b

Helga [31]

The answer for this change in the magnitude of momentum is the same for both because momentum is always conserved so both vehicles have the identical change.
So for determining who has the greater change in kinetic energy, momentum (P) = mv so P^2 = m^2 v^2 P^2 / 2m = 1/2 m v^2 = energy So the weightier the mass the smaller the energy change for the same momentum change so in here, the car has a greater change in kinetic energy.

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3 years ago

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How many neutrons does element X have if its atomic number is 48 and its mass number is 167?

Black_prince [1.1K]

You would have to subtract the mass number with atomic number which will give you 119 number of neutrons.

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3 years ago