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Helga [31]
3 years ago
8

What formula do I use for the second question? For number 3 how is one energy converted to the other? ( using arrows ) I get num

ber 4 so I don't need help with that!

Physics
1 answer:
Fed [463]3 years ago
6 0
<u>#2</u>
Use the formula ... Kinetic energy = (1/2) x (mass) x (speed)²

<u>#3 - a).</u>
sun => energy travels as electromagnetic waves => reaches Earth as
         heat & light energy.

sun => absorbed in plants => eaten by animals => animals die =>
       decay into oil in millions of years => we burn the oil to get the energy.

<u>#3 - b).</u>
food I ate for lunch => metabolized into glucose by my body
       => some of it burned in my muscles to generate energy for immediate needs
       => the rest of it stored as fat for future needs.

<u>#3 - c).</u>
flower pot rolls off the ledge => gravity does work on it all the way down,
       producing the kinetic energy it has when it hits the floor.

<u>#3 - d).</u>
oil or natural gas is burned, releasing heat energy => energy is used
       to generate electricity => electricity flows through cables from the
       power generating plant to your home => hot plate plugged into the
       wall => turns electrical energy back into heat energy => heat energy
       is conducted into the bottom of the beaker, flows through the glass
       to the inside surface => heat energy is conducted from the inside of
       the glass to the water, which gets hotter as it absorbs more energy. 
=============================

<u>Note:</u>
#1 on the sheet is wrong.
"Work = force x distance"  that's correct
But 25-kg is the <em>mass</em> of the ball, <em>not </em>the gravitational <em>force </em>on it.
The force on it is (mass) x (gravity), called its "weight".
   That's (25-kg) x (9.8 m/s²) = 245 kg-m/s² = 245 newtons .
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Answer:

Duration

Explanation:

Because duration is not a factor, but it's the outcome or effect or observation from the reaction used to give the rate of reaction

7 0
3 years ago
The temperature scale which starts at absolute zero is the _____.
oksian1 [2.3K]
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3 years ago
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Bonnie sits on the outer rim of a merry-go-round, and Jill sits midway between the center and the rim. The merrygo-round makes o
olchik [2.2K]

Answer:

e. half of Bonnie's.

Explanation:

Jill and Bonnie move in a circular path with the same angular speed of the merry-go-round.

The tangential velocity of the body is calculated as follows:

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where:

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Data

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ω = 1 rev/2s = 2π rad/2s = π rad/s

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Jill's linear velocity (vJ)

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4 0
3 years ago
Please I need help on this thank you
Norma-Jean [14]
The first option.

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Answer:

767.6 m/s

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The resultant gives the velocity of the third fragment

Third=\sqrt{585^{2}+497^{2}}=767.6157893\approx 767.6 m/s

6 0
3 years ago
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