Two objects, one with a mass of 2 kg and one with a mass of 3 kg are attracted to each other by a gravitational force. If the force on one mass is 4 N, what is the force on the other mass?

Answers

Answer 1

Answer: By Newton's 3rd law: That for every action there is an equal and opposite reaction.

So if force on one mass is 4N, then the force on the other mass is -4N.

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A body with a mass of 2,000 kg is lifted to a height of 15 m within a time of 15 s. Which one of the following statements concerning the action is true?a. The gravity force on the body is 294,000 N. b. The potential energy of the body is 30,000 J. c. The amount of work is 450,000 J. d. The power exerted is 19,600 W.

What is the minimum coating thickness (but not zero) that will minimize the reflection at the wavelength of 705 nm where solar cells are most efficient?

Answers

Answer:

d = 235 nm.

Explanation:

Let the layer be of glass. Refractive index of glass μ = 1.5. Let the required thickness be d.

For minimum reflection , that is destructive interference in thin films , the condition is

2μd = λ ( for first order)

d = 705 / 2 x 1.5 = 235 nm [ λ =705 nm ]

Would you rather drink a hot beverage from a metal cup or a ceramic cup

Answers

Hey there!
I would personally drink a hot beverage from a ceramic cup than a metal cup for various reasons.
Firstly, ceramic cups do not change the taste of the beverage, while in some cases, metal cups do.

Secondly, since metal conducts heat, it would be wise to drink a hot beverage from a ceramic cup. Heated metal can burn your fingers if touched.

(If you feel that my answer has helped you, please consider rating it and giving it a thank you! Also, feel free to make the best answer, the brainliest answer!)

Thank you! :D

Ceramic, since metals can sometimes change the taste.

What is the kinetic energy of an object that has a mass of 30 kilograms and moves with a velocity of 20 m/s?A. 12,000 J
B. 6,000 J
C. 2,940 J
D. 5,880 J

Answers

Kinetic Energy = (1/2) (mass) (speed)² .

Just take that formula, write "30" in place of 'mass', write "20" in place
of 'speed', then do the arithmetic on the right side and you'll have the
kinetic energy. When all the measurements are in SI units, you can
do that.

(Don't forget about the ' 1/2 ', and don't forget to square the speed.)

A 70 kilogram mountaineer is standing on the summit of Mt. Everest. The distance between the mountaineer and the center of Earth is 6.39 × 106 meters. What is the magnitude of the force of gravity acting on the mountaineer? (The value of G is 6.673 × 10-11 newton meter2/kilogram2. The mass of Earth is 5.98 × 1024 kilograms.)90.50 newtons

111.5 newtons

684.1 newtons

4041.7 newtons

Answers

The force due to gravity between two point masses is given by:
F = GMm/r²; where G is the gravitational constant, M is the larger mass, m is the smaller mass, and r is the distance between the two.
F = (6.673 × 10⁻¹¹ × 5.98 × 10²⁴ × 70) / (6.39 × 10⁶)²
F = 684.1 N

F = GMm/r²

F = (6.673*10^-11)(5.98*10^24)(70)/(6.39*10^...

F = 684 N (3sf)

How can you increase the momentum of an object?

Answers

Hope this helps, have a great day ahead!

If the truck has a mass of 2,000 kilograms, what is its momentum? Express your answer in kg·m/sec.

Answers

You don't tell us its speed. If that's the full question and there is no indication of a speed, the answer is 0kg.m/s as it has no momentum

Wait but u don't mention speed, so there's no momentum

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