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GREYUIT [131]
2 years ago
12

A ball is dropped from a height of 20 meters. At what height does the ball have a velocity of 10 meters/second?

Chemistry
1 answer:
musickatia [10]2 years ago
3 0

Answer:

15m

Explanation:

vi = 0

vf = 10

a = -9.8

10^2 = 0 + 2(-9.8)(x2-x1) = -5.1

20-5.1 = 14.9m = 15m

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Arrange the following molecules according to the strength of their dispersion forces. Organize in order from largest to smallest
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Explanation:

The weak intermolecular forces which can arise either between nucleus and electrons or between electron-electron are known as dispersion forces. These forces are also known as London dispersion forces and these are temporary in nature.

Therefore, more is the surface area occupied by the carbon chain more will be the dispersion forces present in it. Hence, less is the surface area occupied by a molecule less will be the dispersion forces present in it.  

Hence, the given molecules are organized from largest to smallest dispersion forces as follows.

CH_{3}CH(CH_{3})C(CH_{3})_{2}CH_{2}CH_{3} > CH_{3}CH_{2}(CH_{2})_{4}CH_{2}CH_{3} > CH_{3}CH_{2}CH_{2}CH_{2}CH_{3} > CH_{3}C(CH_{3})2CH_{3} > CH_{3}CH_{2}CH_{3} > CH4

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3 years ago
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6 0
3 years ago
Case #4
stiv31 [10]

Answer: 1.) His action is not justified because he could have done something else like talking with someone.

2.) Some of the negative consequences could be Mr. King could lose his job  or worse not be able to teach again.

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3 0
3 years ago
A sample of nitrogen gas, (N2), occupies 45.0 mL at 27.00∘C and 80.0 kPa. What will be the pressure if the gas is cooled to −73.
maxonik [38]

Answer:

The new pressure is 53.3 kPa

Explanation:

This problem can be solved by this law. when the volume remains constant, pressure changes directly proportional as the Aboslute T° is modified.

T° increase → Pressure increase

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In this case, temperature was really decreased. So the pressure must be lower.

P₁ / T₁ = P₂ / T₂

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Karo-lina-s [1.5K]
If the temperature rises in a reaction. Exothermic is if it loses heat. 

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