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inn [45]
3 years ago
9

What are the diferent units that we typically use to measure average speed

Physics
1 answer:
Juli2301 [7.4K]3 years ago
6 0
Mph= miles per hour
kph= kilometers per hour
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Tyson throws a shot put ball weighing 7.26 kg. At a height of 2.1 m above the ground, the mechanical energy of the ball is 172.1
max2010maxim [7]

Answer:

2.5 m/s

Explanation:

Mechanical energy is the sum of the potential and kinetic energy.

E = PE + KE

E = mgh + ½mv²

172.1 J = (7.26 kg) (9.8 m/s²) (2.1 m) + ½ (7.26 kg) v²

v = 2.5 m/s

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3 years ago
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In a sun's life span, if the Hydrogen to Helium ratio at the Red Giant phase is 100% Helium and 0% Hydrogen, Predict the Hydroge
serg [7]

Answer:

3rd bc the atmoce

Explanation:

4 0
2 years ago
Atoms are very small. Which measurement is the approximate diameter of a helium atom?
stich3 [128]
Atoms diameter are on the order of 60 to 600pm  (picometers).  This is around 6*10^-11.
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3 years ago
What happens when magnesium reacts with fluorine
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3 0
3 years ago
Power is the rate at which energy is transformed. A person is limited in the total work he or she can do only by the total energ
Sergio039 [100]

Answer:

Power is the rate at which energy is transformed.

The SI unit of power is the watt.

Power is the rate at which work is done.

Explanation:

In this question we have to choose the statements related to Power that are True.

In this sense, Power P is the speed with which work W is done. Its unit is Watts (W), being 1 W=\frac{1 Joule}{1 s}.  

Power is mathematically expressed as:

P=\frac{W}{t}

Where t is the time during which work W is performed.

On the other hand, the Work W done by a Force F refers to the release of potential energy from a body that is moved by the application of that force to overcome a resistance along a path. It is a scalar magnitude, and its unit in the International System of Units is the Joule (like energy). Therefore, 1 Joule is the work done by a force of 1 Newton when moving an object, in the direction of the force, along 1 meter (1J=(1N)(1m)=Nm ).

So, according to this explanation, the true statements are:

Power is the rate at which energy is transformed.

The SI unit of power is the watt.

Power is the rate at which work is done.

4 0
3 years ago
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