3 years ago

Do atoms have mass ?

1 answer:

4 0

There are not enough electrons in atoms to affect the total mass, so the total mass is just the weight of the protons and neutrons.

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Chris walks 25 m in the positive direction on a number line, then turns around and walks 15 m in the opposite direction. What is

7nadin3 [17]

Answer:

$|d| = |(25 - 15)| \\ |d| = 10 \: m$

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3 years ago

4 (JAMB) The diagram below shows a light see-saw, which is balanced horizontally by the weights W₁, W2, W3, W4 in the positions

damaskus [11]

The equation that represents the principle of the lever balance is:

W₁ + W₂ = W3 + W4; option A.

<h3>What is the principle of moments?</h3>

The principle of moments states when a body is in equilibrium, the sum of the clockwise moment about a point equals the sum of anticlockwise moment about that point.

A see-saw represents a balanced system of moments.

The sum of clockwise moment = The sum of anticlockwise moments.

Assuming W1 and W2 are clockwise moments and W3 and W4 are anticlockwise moments.

The equation will b: W₁ + W₂ = W3 + W4

In conclusion, a balanced see-saw illustrates the principle of the lever balance.

Learn more about principle of moments at: brainly.com/question/20519177

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2 years ago

A professional golfer hits a golf ball of mass 46 g with her 5-iron, and the ball first strikes the ground 155 m away. The ball

RideAnS [48]

Answer:

$C=2.32\times 10^{-4}\ Ns^2/m^2$

Explanation:

It is given that,

Mass of the golf ball, m = 46 g = 0.046 kg

Terminal speed of the ball, v = 44 m/s

The drag force, $F_r=Cv^2$

Where, C is the drag coefficient. At terminal speed, the weight of the ball is balanced by the drag force.

$Cv^2=mg$

$C=\dfrac{mg}{v^2}$

$C=\dfrac{0.046\times 9.8}{(44)^2}$

$C=2.32\times 10^{-4}\ Ns^2/m^2$

Hence, this is the required solution.

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3 years ago

Two friends are carrying a crate of mass 200 kg up a flight of stairs. The crate has length 1.25 m and height 0.500 m, and its c

Marysya12 [62]

Ans; see attached file for calculation and answer

Explanation:

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3 years ago

Which substance is uniquely a product of incomplete combustion of a fossil fuel?

Serga [27]

I can think of two of them:

-- carbon monoxide

-- black soot

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3 years ago