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3 years ago

Simplify 6.25 − 8.please help

Physics

1 answer:

tatyana61 [14]3 years ago

7 0

6.25 - 8 = -1.75

Hope this helps

-AaronWiseIsBae

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What is the current in a 160V circuit if the resistance is 2Ω? V= I= R=

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Explanation:

v = IR

v= 160 R = 2

160 = 2I

2 2

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4 0

3 years ago

A fat person weighing 80 Kg falls on a concrete floor from 2m. If whole of the mechanical energy is converted into heat energy,

sasho [114]

Answer:

The heat produced is 1568 J

Explanation:

The given parameters are;

The mass of the person, m = 80 kg

The height from which the person falls, h = 2 m

Mechanical Energy, ME = Potential Energy, PE + Kinetic Energy, KE

At the height, from where the person falls, the initial velocity of the person = 0 m/s

Therefore;

The initial kinetic energy, K.E. = 1/2·m·v² = 1/2 × 80 kg × (0 m/s)² = 0 J

From which we have;

The Mechanical Energy, M.E. = The initial Potential Energy, P.E. + 0 J

∴ The Mechanical Energy, M.E. = The initial Potential Energy, P.E.

The initial Potential Energy, P.E. = m·g·h

Where;

m = The mass of the person

g = The acceleration due to gravity ≈ 9.8 m/s²

∴ The initial Potential Energy, P.E. = 80 kg × 9.8 m/s² × 2 m = 1568 J

The Mechanical Energy, M.E. = The initial Potential Energy, P.E. = 1568 J

The whole mechanical energy is converted into heat energy, therefore, we have;

The Mechanical Energy, M.E. = The heat energy = 1568 J

The heat produced = The heat energy = 1568 J.

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3 years ago

How long does it take for light from a star that is 8 light-years away to reach earth? A. 8 earth minutes B. 16 earth minutes C.

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Hey there,

Your question states: How long does it take for light from a star that is 8 light-years away to reach earth?

It take just about (8 earth years) for light from a star that is 8 light-years away to reach earth. That is how $FAST$ it would take.

Hope this helps.
~Jurgen

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3 years ago

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Ways that industry and agriculture use physical properties to separate substances

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They use size and weight

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3 years ago

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jek_recluse [69]

Explanation:

Given that,