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3 years ago

WORD

Chemistry

1 answer:

LiRa [457]3 years ago

4 0

Answer:

Nuecleus: C the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.

Proton: D a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.

Neutron: B a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.

Electron: A a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

Explanation:

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3 years ago

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What is the net force acting on a golf car travelling at constant speed of 5 mph

Brilliant_brown [7]

The answer is 0 Newtons

This is because of a key word in the question: “constant”

When we say something has a constant speed, that means that its acceleration is 0.

Using the equation derived for Newton’s 2nd law, we see that F=ma

Force = mass x acceleration

If acceleration, a, equals 0, then when we multiply our mass times acceleration 0

F=m(0)

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2 years ago

A cube of metal weighs 1.45 kg and displaces 542 mL of water when immersed. Calculate the density of the metal.

Korvikt [17]

Answer:

The Density of the cube of metal is 2.675g/mL or 2675kg/mL.

Explanation:

Given the following data;

Mass of metal = 1.45kg to gram (g) = 1.45 × 1000 = 1450g

Volume of the cube of metal = 542mL

Density = ?

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the equation;

$Density = \frac{mass}{volume}$

Substituting into the equation, we have;

$Density = \frac{1450}{542}$

Density = 2.675g/mL

In kilograms, the density is 2.675 x 1000 = 2675kg/mL.

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3 years ago