2 years ago

Atoms are mostly made of what

Physics

2 answers:

dimulka [17.4K]2 years ago

7 0

Atoms are made out of protons, neutrons, and electrons. I hope this helped! :-)

Olin [163]2 years ago

6 0

An atom itself is made up of three tiny kinds of particles called subatomic particles: protons, neutrons, and electrons. The protons and the neutrons make up the center of the atom called the nucleus and the electrons fly around above the nucleus in a small cloud.

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A book is pushed off the edge of a table. Which is true about the motion of this book? A. It falls straight down because two con

g100num [7]

The answer is A !! Gravity is a force that will bring an object to a complete stop.

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2 years ago

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g 4.86 Separators are used to separate liquids of diff erent densities, such as cream from skim milk, by rotating the mixture at

dolphi86 [110]

Answer:

Centripetal Acceleration = 88826.44 m/s²

RCF = 9054.7

Explanation:

First, we will find the value of the centripetal acceleration by using the following formula:

$Centripetal\ Acceleration = \frac{v^2}{r}\\$

where,

v = linear speed of liquid or separator = rω

ω = angular speed of liquid or separator = (9000 rpm)(2π rad/rev)(1 min/60 s) = 942.48 rad/s

r = radius of seperator = diameter/2 = 20 cm/2 = 10 cm = 0.1 m

Therefore,

$Centripetal\ Acceleration = \frac{(r\omega)^2}{r}\\Centripetal\ Acceleration = r\omega^2\\Centripetal\ Acceleration = (0.1\ m)(942.48\ rad/s)^2\\$

<u>Centripetal Acceleration = 88826.44 m/s²</u>

Now, for the RCF:

$RCF = \frac{Centripetal\ Acceleration}{g}\\RCF = \frac{88826.44\ m/s^2}{9.81\ m/s^2}\\$

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2 years ago

states that the force times the distance on one side of a lever's fulcrum equals the force times the distance on the other side

andrey2020 [161]

Answer:

Explanation:

It is said to be in equilibrium about the fulcrum . It is the principle of moments.

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2 years ago

anastassius [24]

Answer:

the answer is c

Explanation:

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2 years ago

A car that is initially moving to the right with a velocity of 4 m/s is pushed by a -5 N force as it moves from 5 meters to 20 m

m_a_m_a [10]

Answer:

the work done on the car by the applied force is 75 J.

Explanation:

Given;

initial velocity of the car, v = 4 m/s

applied force in opposite direction, F = 5N

initial position of the car, x₀ = 5 m

final position of the car, x₁ = 20 m

displacement of the car, Δx = x₁ - x₀ = 20 m - 5m

= 15 m

The work done on the car by the applied force is calculated as follows;

W = F.Δx

W = 5 x 15

W = 75 J

Therefore, the work done on the car by the applied force is 75 J.

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2 years ago