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3 years ago

What is the centripetal force needed to keep a 3.0kg mass moving in a circle of radius 0.50 m at a speed of 8.0m/s?

Physics

1 answer:

fomenos3 years ago

5 0

Answer:

384N

Explanation:

Given parameters:

Mass = 3kg

radius = 0.5m

Speed = 8m/s

Unknown:

Centripetal force = ?

Solution:

The centripetal force is the inward force that keeps a body in motion along a circular path.

It is mathematically expressed as;

F = $\frac{mv^{2} }{r}$

m is the mass

v is the speed

r is the radius

Now insert the parameters and solve;

F = $\frac{3 x 8^{2} }{0.5}$ = 384N

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When sound waves interfere to create standing waves, the points on the medium that move up and down with the largest amplitudes

malfutka [58]

The correct answer is: Anti-nodes.

Explanation:

When the interference between the two waves is constructive and the points on the wave that undergo the maximum displacement during each vibrational cycle of the standing wave back and forth. Those points are called anti-nodes. Hence, in the case of sound waves, interference creates standing waves, and the points on the medium that move up and down with the highest amplitudes are called anti-nodes.

7 0

3 years ago

Read 2 more answers

A major league baseball has a mass of 0.145 kg.

galben [10]

The momentum of the ball when it hits the ground is 4.89 kg.m/s.

The given parameters;

mass of the baseball, m = 0.145 kg
height of fall of the ball, h = 58 m

The final velocity of the ball when it hits the ground is calculated as follows;

$v_f ^2 = v_0^2 + 2gh\\\\v_f^2 = 0 + 2gh\\\\v_f^2 = 2gh\\\\v_f = \sqrt{2gh} \\\\v_f = \sqrt{2\times 9.8 \times 58}\\\\v_f = 33.72 \ m/s$

The momentum of the ball when it hits the ground is calculated as follows;

P = mv

P = 0.145 x 33.72

P = 4.89 kg.m/s

Thus, the momentum of the ball when it hits the ground is 4.89 kg.m/s.

Learn more here:brainly.com/question/22035809

6 0

3 years ago

What is general relativity

juin [17]

General relativity is a theory of space and time. The theory was published by Albert Einstein in 1915. The central idea of general relativity is that space and time are two aspects of spacetime. Spacetime is curved when there is gravity, matter, energy, and momentum.

5 0

3 years ago

True or False. Recent findings lend strong support to the theory that a black hole lies at the center of the Milky Way and of ma

Genrish500 [490]

Answer:

True

Explanation:

In 2019 was taken the first image of a supermassive black hole in the center of the galaxy M87 with the Event Horizon Telescope, which is a network of radio telescope located in different points of the Earth, with the purpose of making a telescope of the size of the Earth.

A radio telescope is an antenna that is capable to perceive the light in the radio part of the electromagnetic spectrum¹.

It is important to notice that in the picture what it can be seen is the effect that the black hole has in the nearby stars.

Key terms:

¹Electromagnetic spectrum: decomposition of light in its different wavelengths (from radio waves to gamma rays).

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4 years ago

Two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. (a) What is the magnitude

aivan3 [116]

Answer:

$E=6.8Kv/m$