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3 years ago

Which best compares kinetic energy and temperature?

1 answer:

3 0

Temperature is directly proportional to the average kinetic energy of the molecules in a substance. If the degree of motion of the molecules inside an object doubles, the temperature will also double. Hope this helps. Have a nice day.

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A rock is dropped from the top of a vertical cliff and takes 3.00 s to reach the ground below the cliff, A second rock is thrown

Tcecarenko [31]

Answer:

12.25m/s

Explanation:

$d=v_ot+\dfrac{1}{2}at^2$

Since the initial velocity of the dropped rock is 0, you can write this as:

$d=\dfrac{1}{2}(9.8)(3)^2=44.1m$

Now, you can set up the equation for the thrown rock:

$44.1=v_o(2)+\dfrac{1}{2}(9.8)(2)^2 \\\\\\44.1=2v_o+19.6 \\\\\\2v_o=24.5 \\\\\\v_o=12.25m/s$

Hope this helps!

3 0

3 years ago

What does Newton's first law of motion tell us about velocity?

zubka84 [21]

Every body continues in a state of rest or uniform motion in a straight line unless acted on by a resultant external force. That's approximately Newton's first law of motion.
So, the velocity of something tends to remain the same, unless an external force changes it. This is sometimes called "inertia". A body at rest, as in with "no velocity" will tend to remain at rest, unless there's a force on it. inertia again.

6 0

3 years ago

HELP PLEASEEEEEEEEEEE

sertanlavr [38]

Answer:

dolphins and wolfs very easy

Explanation:

7 0

3 years ago

Select the star life cycle that is accurate.

Veseljchak [2.6K]

Answer:

B according to the picture

Explanation:

Star of 3 stellar masses => red supergiant=>supernova=>neutron star

8 0

3 years ago

The current through a 10 ohm resistor is 1.2 amperes.What is the potential difference across the resistor?

Natalija [7]

Answer: The potential difference across the resistor is 12 volts.

Explanation:

To calculate the potential difference cross the resistor, we use Ohm's Law. This law states that the potential difference across two wires is directly proportional to the current flowing through that wire.

Mathematically,

$V\propto I\\V=IR$

Where,

V = potential difference = ?V

I = Current flowing = 1.2 A

R = Resistor = $10\Omega$

Putting values in above equation, we get:

$V=1.2\times 10=12V$

Hence, the potential difference across the resistor is 12 volts

6 0

3 years ago