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2 years ago

Which equation correctly represents the gravitational potential energy of a

Physics

2 answers:

Lerok [7]2 years ago

7 0

Answer:

GPE = ME − 1/2 mv^2

Explanation:

Just did it

arsen [322]2 years ago

5 0

Answer:

$PE=ME-\dfrac{1}{2}mv^2$

Explanation:

The mechanical energy of an object is equal to the sum of kinetic energy and the potential energy. Let ME is mechanical energy, KE is kinetic energy then its potential energy PE is given by :

$ME=PE+KE$

Since, KE = (1/2) mv^2

$PE=ME-KE\\\\PE=ME-\dfrac{1}{2}mv^2$

So, $PE=ME-\dfrac{1}{2}mv^2$ correctly represents the gravitational potential energy of a .system

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In the average US household, the television is on 6.75 hours/day! How many hours will have passed after 77.7 years (the average

Nady [450]

Answer:

191433.4 hours

Explanation:

We are given that In the average US household, the television is on 6.75 hours/day! How many hours will have passed after 77.7 years (the average lifeexpectancy of an American)?

1 year - 365 days

Given that the television is on 6.75 hours/day.

If 1 year = 365 days

Convert 77.7 years to days by multiplying it by 365

77.7 × 365 = 28360.5 days

So the number of hours will be:

28360.5 × 6.75 = 191433.375 hours

Therefore, 191433.4 hours will pass.

Non of the options is correct.

6 0

3 years ago

Write any two uses of simple machines.

Nana76 [90]

Simple machines could be used to reduce effort or extend the ability of people to perform tasks beyond their normal capabilities.
Examples include pulley, lever, and incline plane

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2 years ago

Determine the right answer to fill in the blank spaces

ratelena [41]

Answer:

Explanation:

A pure substance is something that is entirely made up of particles that are identical to each other.

Any substance that is not pure, must be a mixture.

We are surrounded by mixtures. The air is a mixture of gases . The oceans are a mixture of (mainly) water and salt. The solid earth is mostly rock, which is a mixture of different minerals.

Natural resources are substances we need and use, which occur naturally. Some come from living things, (example) cotton other are non-living (example) sand.

The opposite of a natural resource is a made resource.

5 0

2 years ago

How are points made in soccer ?

Anit [1.1K]

A- by kicking the ball into the net/goal

5 0

2 years ago

Read 2 more answers

How does the speed of visible light compare with the speed of gamma rays

DochEvi [55]

Answer:

They are the same

Explanation:

Electromagnetic waves consist of perpendicular oscillations of electric and magnetic field, which oscillate perpendicularly to the direction of motion of the wave (transverse wave). One property of the electromagnetic waves is that they travel in a vacuum always at the same speed, called speed of light:

$c=3.0\cdot 10^8 m/s$

Electromagnetic waves are classified into 7 different types according to their frequency; from highest to lowest frequency, we have:

Gamma rays

X-rays

Ultraviolet

Visible light

Infrared

Microwaves

Radio waves

We see that both visible light and gamma rays are electromagnetic waves, so they both travel in a vacuum at the same speed, the speed of light.

3 0

3 years ago