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PilotLPTM [1.2K]
2 years ago
13

A fire women dropped a person onto the safety net.Right before the person hit the net he had a velocity of 11.2m/s and 1800 J of

kinetic energy. What was the mass of the person?
Chemistry
2 answers:
Snezhnost [94]2 years ago
3 0
Cheese isosisiiaiasiaiss s snananana
Ainat [17]2 years ago
3 0

Explanation:

kinetic energy = ½mv²

1800 = ½ × m × 11.2²

1800 = ½ × m × 125.44

3600 = 125.44m

m = 3600/125.44

m = 28.7 Kg

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Answer:

Yes

Explanation:

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The glycerine is more viscous than water because due to presence of hydrogen atoms , we all know that glycerine has more hydrogen bonding than water molecule , which makes an aggregation which means that glycerine is more viscous than water , in simple words glycerine can't flow as that of water molecule.

7 0
2 years ago
A student performs an experiment to find the percentage of water in a hydrate. He determines that the hydrate contains 22% water
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Answer:

A feasible error could have been the removal of the sample before all water evaporated.

Explanation:

In order to determine the percentage of water in an hydrate, an experiment that could be performed is the heating of the sample until the mass does not change. If the student heated the sample an insufficient amount of time, water will be present in the sample, thus reducing the percentage reported.

4 0
3 years ago
Certain substances have a degreasing effect. Which of the substances below has a degreasing effect in solution?
Eduardwww [97]

Answer:

Sodium Carbonate

Explanation:

Washing Soda�Sodium Carbonate (Na2CO3) (Na = Sodium, water softening)

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3 0
2 years ago
H. Nitrogen gas and hydrogen gas combine to produce ammonia gas (NH3).
DedPeter [7]

Answer:

<u>27.3 L</u>

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<u>Reaction</u>

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  • This is the basic reaction at STP

<u>Solving</u>

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  • ⇒ 1.07 mol H₂

  • V = nRT/P [From Ideal Gas Equation]
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