Engineering Middle School

A ball of 0.900 kg slides horizontally over a frictionless surface and bumps into a heavy stone at a speed of 20.0 m / s. The ball returns with 70.0% of its initial kinetic energy. How big is the change in the impulse of the stone?

Answers

Answer 1

Answer:

33.06 Kgm/s

Explanation:

Given information

Initial velocity= 20 m/s

mass, m=0.9 Kg

[tex]0.5\times 0.9\times v^{2}=0.5\times 0.7\times 0.9 Kg\times 20^{2}[/tex]

[tex]v^{2}=280[/tex]

[tex]v=\sqrt {280}=16.7332 m/s[/tex]

Here, v is -16.7332 m/s in opposite direction

Change in momentum

[tex]\triangle p= m(v-u)=0.9(-16.7332-20)=-33.0599 Kgm/s\approx -33.06 Kgm/s[/tex]

Therefore, the magnitude of change in momentum is 33.06 Kgm/s

Related Questions

Which of the following is NOT true about essential body fat?
A. The human body would not function normally without essential body fat.
B. Essential body fat accounts for about 3% of men's total weight.
C. The percentage of essential body fat is the same for both males and females.
D. Essential body fat is found in one's organs, bones, and muscles.
Please select the best answer from the choices provided.

Answers

Answer:

Explanation: Body fat is Not the same for males and female's. The rest of the ansewrs are TRUE. (I'm bad at explaining)

Answer:

C- The percentage of essential body fat is the same for both males and females

Explanation:

This is because they are the same race and therefore need the same to survive.

need answers for these please

Answers

Answer:

Following are given the answers one-by-one with explanation:

(a) 8 records

As records are the horizontal rows of data and we have 8 of them.

(b) 5 fields

As fields are vertical columns of data and we have 5 of them.

(c)E3000

As by sorting Makers_names in ascending order the last one would be Rany and by sorting Processor_type we have two option with Rany that are B1500 and E3000. We can see that E3000 will come at the end.

(d) Computer_type

As only two choices (Laptop and PC ) are being used under the column computer_type so it can be amended to contain Boolean data.

(e) format check

This will check that the field should contain one alphabet (capital letter) followed by 4 digits each.

i hope it will help you!

Gina is about to use a fire extinguisher on a small fire. What factor determines the type of extinguisher she should use

Answers

It should be noted that fire extinguisher is important in order to control fire when there’s an outbreak. Gina to use a fire extinguisher on a small fire, the factor that determines the type of extinguishers he should use is the type of fire.

What are the types of fire extinguisher ?

The fire extinguisher is used by the fire brigade persons to control fire in different places, three things to be present simultaneously to generate fire such as fuel, a heat source ignite the fuel and air where supply of oxygen occur.

Fire extinguishers can mainly cut off the supply of oxygen which ultimately control fire, it can alter any of the controlling elements from the fire triangle.

Fire extinguishers are of a considerable variety such as Water and foam, Carbon Dioxide which Takes away the heat and the oxygen element, Dry Chemical, Wet Chemical, Clean Agent which can Interrupts the chemical reaction, Dry Powder, Water mist which can Take away the heating element.

For more details regarding fire extinguisher , visit

https://brainly.com/question/3905469

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If you are exposed to potentially infectious material via a sharps injury, what should you do immediately?

Answers

The correct answer is "immediately flood the area with water and clean the wound."

Further Explanation:

If someone is exposed to a potentially infectious material with a sharps item such a needle, they need to wash the area with clean water immediately. It must be a steady flow of water to get out any potential infectious material.

After flushing the injury with water, you will then wash the area or exposed skin with soap, if at all possible use a disinfectant on the area.

The person who was injured should seek medical assistance for tests to be sure that they have not been affected.

Learn more about infectious material at https://brainly.com/question/10928952

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Answer: wash the area with soap and water

Explanation:

answer on career safe!

Drive at a speed that places the farthest objects you can see clearly no less than _____ ahead of you. A. 3 seconds B. 5 seconds C. 100 ft D. 300 ft

Answers

Drive at a speed that places the farthest objects you can see clearly no less than 5 seconds ahead of you.

Explanation:

Looking ahead helps to identify risks quickly and allows more time to react. Expert drivers try to focus their eyes 5 to 10 seconds ahead, which means one block approximately.

Staring at the middle of the road should be avoided. Proper Scanning from side to side, traffic signs and signals should be checked properly.

If we drive too fast like less than 5 sec, a fallen tree or a stopped vehicle on the lane will not be visible, and we will not get enough time to avoid crashing.

__ signals always take priority over signs and traffic signals

Answers

Answer:

Stop singnals

Explanation:

Remy is smoking too closely to a building that manufactures fertilizer. When he puts out his cigarette near the hazardous waste, it sparks a fire because the fertilizer is flammable. What kind of hazard did the chemical waste cause?

Answers

Final answer:

Hazardous waste caused a flammable hazard due to chemicals that can burn easily and give off harmful fumes.

Explanation:

Hazardous waste from the building that manufactures fertilizer caused a flammable hazard when Remy put out his cigarette near it, sparking a fire. The release of chemicals that can burn easily and give off harmful fumes illustrates the dangers of flammable waste in chemical environments.

The hazardous waste in this scenario caused a physical hazard by igniting due to its flammability when exposed to the heat source from Remy's cigarette.

Because of its flammability, the hazardous material presented a physical risk and when it came into contact with Remy's cigarette's heat source, it caught fire. When flammable materials—like the fertilizer—come into touch with an ignition source—like a spark, they have the ability to fire quickly.

This incident emphasises how crucial it is to handle and store hazardous items properly in order to reduce risks and avoid accidents. It also emphasises the necessity of stringent safety procedures and laws in order to reduce the risk of fires and safeguard people and property.

Complete correct question:

Physical

Chemical

Smoke

Ergonomic

Acredit report summarizes a person's Acredit score is measure of a person's as a borrower a factor that contributes to a person's credit score

Answers

Answer:

1) credit activity

2) trustworthiness

3) payment history

Explanation:

just checked on edg

Answer:

1) credit activity

2) trustworthiness

3) payment history

Explanation:

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