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1 year ago

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Physics

1 answer:

drek231 [11]1 year ago

5 0

Answer:

The answer is in the attachment

Explanation:

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Each element has an atomic number state which is meant by atomic number

netineya [11]

Answer: The atomic number is the number of protons in an atom, and isotopes have the same atomic number but differ in the number of neutrons. The number of protons in an atom is called its atomic number. This number is very important because it is unique for atoms of a given element. All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms.

Explanation:

3 0

2 years ago

Imagine that the apparent weight of the crown in water is Wapparent=4.50N, and the actual weight is Wactual=5.00N. Is the crown

9966 [12]

Answer:

Explanation:

Actual weight, Wo = 5 N

Apparent weight, W = 4.5 N

density of water = 1 g/cm^3 = 1000 kg/m^3

density of gold, = 19.32 g/cm^3 = 19.32 x 1000 kg/m^3

Buoyant force = Actual weight - Apparent weight

Volume x density of water x g = 5 - 4.5

V x 1000 x 9.8 = 0.5

V = 5.1 x 10^-6 m^3

Weight of gold = Volume of gold x density of gold x gravity

W' = 5.1 x 10^-6 x 19.32 x 1000 x 9.8 = 0.966 N

As W' is less than W so, it is not pure gold.

4 0

3 years ago

What is true about energy that is added to a closed system

arsen [322]

It does work or increases thermal energy

4 0

3 years ago

Read 2 more answers

What was the dwarf planet discovered in AZ?

Lerok [7]

Answer:

Pluto.

Explanation:

an observary in Flagstaff, Arizona, discorvered it.

6 0

2 years ago

g A wheel of radius 1.2 meters initially rotates clockwise around its center with an angular speed of 10 rad/s, and it steadily

Lemur [1.5K]

Answer:

α = 5 rad / s²

Explanation:

This is a rotational kinematics exercise.

They indicate the initial velocity wo = 10 rad / s

w = w₀ + α t

α = $\frac{w-w_o }{t}$

let's calculate

α = $\frac{30-10}{4}$

α = 5 rad / s²

The velocity, the angular relation are the same in all the points of the wheel, the velocities and linear accelerations are the ones that change

a = α r

v = w r

5 0

2 years ago

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