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Phoenix [80]
2 years ago
15

An athlete produced 840 watts of power in 0.6 seconds. How much work did this individual perform during the exercise

Physics
1 answer:
Veseljchak [2.6K]2 years ago
7 0

An athlete produced 840 watts of power in 0.6 seconds. And will produce 504 joule of work did this individual perform during the exercise.

<u>Solution:</u>

we know that power is the work done completed in a given interval of time.

Power = \frac{work}{time}

also, Work = Power × Time

Work = 840 × 0.6 = 504 joule

What is Power?

  • The quantity of work that can be accomplished in a certain amount of time is measured by power.
  • Power is expressed in joules per second (J/s) this is because work is denoted by the symbol J and time by the symbol s.
  • This is the watt, which is also known as the power unit in SI (W). One joule of labor per second is equal to one watt.
  • The number of watts that a device uses is indicated on labels for lightbulbs and other small appliances like microwaves.
  • A force must be applied in order for work to be completed, and there must also be motion or displacement in the force's direction.
  • The amount of force multiplied by the distance moved in the force's direction is known as the work done by a force acting on an item. Work has no direction and only magnitude. Work is a scalar quantity as a result.

Know more about work power numerical brainly.com/question/181496

#SPJ4

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a tungsten and coil has a resistance of 12 ohm at 15 degree celsius is the temperature coefficient of resistance of tungsten is
Dennis_Churaev [7]

Answer:

The resistance of the tungsten coil at 80 degrees Celsius is 15.12 ohm

Explanation:

The given parameters are;

The resistance of the tungsten coil at 15 degrees Celsius = 12 ohm

The temperature coefficient of resistance of tungsten = 0.004/°C

The resistance of the tungsten coil at 80 degrees Celsius is found using the following relation;

R₂ = R₁·[1 + α·(t₂ - t₁)]

Where;

R₁ = The resistance at the initial  temperature = 12 ohm

R₂ = The resistance of tungsten at the final temperature

t₁ = The initial temperature = 15 degrees Celsius

t₂ = The final temperature = 80 degrees Celsius

α = temperature coefficient of resistance of tungsten = 0.004/°C

Therefore, we have;

R₂ = 12×[1 + 0.004×(80 - 15)] = 15.12 ohm

The resistance of the tungsten coil at 80 degrees Celsius = 15.12 ohm.

6 0
3 years ago
a new planet is discovered that has twice the earth’s mass and twice the earth’s radius. on the surface of this new planet, a pe
Irina18 [472]

Answer: 250n

Explanation:

The formula for gravitational force is: F = (gMm)/r^2

There are two factors at play here:

1) The mass of the planet 'M'

2) The radius 'r'

We can ignore the small M and the g, they are constants that do not alter the outcome of this question.

You can see that both M and r are double that of earth. So lets say earth has M=1 and r=1. Then, new planet would have M=2 and r=2. Let's sub these two sets into the equation:

Earth. F =  M/r^2 = 1/1

New planet. F = M/r^2 = 2/4 = 1/2

So you can see that the force on the new planet is half of that felt on Earth.

The question tells us that the force on earth is 500n for this person, so then on the new planet it would be half! So, 250n!

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If EMS waves are transverse, what conclusion can you make concerning the distances they can travel?
Svet_ta [14]

Explanation:

The wavelength, λ defined as the total distance traveled by the wave in one full cycle of motion. In other words, wavelength can be given by horizontal distance between repeating units of wave pattern.

Also, the wavelength of a transverse wave can be measured as the distance between two adjacent crests or troughs.

λ × f = v

Where,

f = frequency in Hz

v = speed in m/s

8 0
3 years ago
An electric scooter has a battery capable of supplying 150 Wh of energy. If friction forces and other losses account for 60.0% o
german

Answer:

First, we need to convert Wh to joules. This can be easily done. Wh means that you are doing 1W of work per hour. We need to find out how much work this is.

We lost 60% of this energy on friction and other losses which means that this leaves us with:

We are going to use this energy to do work against the force of gravity. This means that when we reach our maximum height all of our energy will be used and thus converted the potential energy in the gravitational field.

Explanation:

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What means 10² what we call this​
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we call it as well as 100 . so easey

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