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Norma-Jean [14]
3 years ago
11

A ball is thrown upward with an initial velocity of 13 m/s. Using the approximate value of

Physics
1 answer:
dem82 [27]3 years ago
5 0

Answer:

v=v0 - gt

Explanation:

The equation for velocity is

v=v0 - gt

where v0=14m/s, g=10m/s^2.

in 1 second:

v=14-10=4m/s

it is positive so direction is upwards

in 2 seconds:

v=14-20=-6m/s

it is negative so direction is downwards

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What quantity of heat must be removed from 20g<br>of water at 0°C to change it to ice at 0°C?​
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The quantity of heat must be removed is 1600 cal or 1,6 kcal.

<h3>Explanation : </h3>

From the question we will know if the condition of ice is at the latent point. So, the heat level not affect the temperature, but it can change the object existence. So, for the formula we can use.

\boxed {\bold {Q = m \times L}}

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<h3>Steps : </h3>

If :

  • m = mass of water = 20 g => its easier if we use kal/g°C
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Answer :

Q = m \times L \\ Q = 20 \times 80 = 1600 \: cal

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<u>Subject : Physics </u>

<u>Subject : Physics Keyword : Heat of latent</u>

4 0
3 years ago
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The blank tells how many and the blank tells of what
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Explanation:

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