A metal box, attached to a small parachute, is dropped from a helicopter. explain in terms of the forces acting; why:(i) its velocity increased immediately after being dropped
(ii) it reached a uniform velocity after a short time

Answers

Answer 1

Answer: (i) because there's gravity force pulling it downwards.

(ii) because the force on the metal box is gone (either it has landed on the ground or something else happened) that means that the metal box is no longer moving but it has constant velocity/uniform velocity.

I'm sorry if it's wrong but that's how I see it

Answer 2

Answer:

Answer:

Explanation:

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Average amount of time wind machines operate

Answers

The wind machine on an average operates for a time of about $\boxed{3-4\text{ hours}}$ .

Explanation:

The wind energy is the method of using the energy carried by the wind to generate the power. The wind energy is the considered as the conventional and clean source of energy.

The wind machines require the high power winds to rotate the blades of the windmill and produce power using the energy of the moving wind.

The winds blow at such high speed for a very small time during the day, the wind machine cannot be expected to work for a longer time during the whole day.

The wind energy can be obtained form a wind mill for a limited time unlike the other form of energy like thermal energy or even the solar energy. The thermal energy can be obtained at anytime due to burning of fuel whereas the solar energy can at least be obtained during the whole day time.

Thus, the wind machine on an average operates for a time of about $\boxed{3-4\text{ hours}}$ .

Learn More:

1. Acceleration of the box under friction brainly.com/question/7031524

2. The kinetic energy of an object depends on the brainly.com/question/137098

3. The approximate time taken to walk for 2000 miles brainly.com/question/3785992

Answer Details:

Grade: Middle School

Subject: Physics

Chapter: Energy

Keywords:

wind energy, conventional source, energy, thermal, solar, 3-4 hours, high speed, machine, time, operate.

To which scientific discipline are the fields of geology, materials, and nutrition best related?

Answers

Chemistry is a field of science deals with chemicals, reactions, and their structure. Chemistry is the discipline in which geology, material, and nutrition are studied.

What is chemistry?

The field of science deals with the substances of matter its composition and the checking of their reactions and property of a chemical reaction.

What is geology?

The field of science interact with the physical structure of the earth, and history of the earth's surface, and the processes already done.

To know more about chemistry refer to the link;

brainly.com/question/1882888

Chemistry: geology, materials and nutrition uses the foundations of chemistry to develop their applications, predict results, provide explanations and base their discoveries.

The expiration date on a product refers to the last date a product should be __________.

Answers

You should not eat foods that have passed their written expiration date

It is the last date that the product should be sitting on the shelf. Or sold

A machine does 1,500 joules of work in 30 seconds. What is the power of this machine?

Answers

the power of the machine is 50

What type of force pulls in two opposite directions?a. tension (associated with normal faults)
b. normal (associated with longitudinal faults)
c. transform (associated with transform faults)
d. compression (associated with reverse faults)
Which is not a type of fault?
a. normal
b. reverse
c. diagonal
d. transform

Answers

Answer

a. tension (associated with normal faults)

c. diagonal

Explanation

A pull of spring or of string on both ends of an object is called tension. So for the question one, the answer is tension (associated with normal faults)

There are three types of faults. Faults are produced by stress or strain by moving plates. These faults are: normal faults, reverse faults and transcurrent or Strike-slip. Strike-slip faults can also be called transform fault. The answer to the second question is c. diagonal.

Answer:

Tension Force (associated with normal faults)

Explanation:

As we know that tension force is an internal force between the molecules which opposes the tendency of molecules to separate out.

The tension force of string is always in opposite directions at two ends of string and it is always along the length

Answer:

Diagonal

Explanation:

As we know that there are four types of vaults

1) Normal vaults

2) Longitudinal vaults

3) Reverse vaults

4) Transform vaults

Sound waves travel faster in: a. solids as compared to liquids. b. liquids as compared to gases. c. warm air as compared to cooler air. d. All of the above are correct.