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3 years ago

How is atomic mass calculated?

Physics

2 answers:

Natali5045456 [20]3 years ago

7 0

Answer:

To calculate the atomic mass of a single atom of an element, add up the mass of protons and neutrons. Example: Find the atomic mass of an isotope of carbon that has 7 neutrons. You can see from the periodic table that carbon has an atomic number of 6, which is its number of protons.

Explanation:

OlgaM077 [116]3 years ago

6 0

To calculate the atomic mass of a single atom of an element, add up the mass of protons and neutrons. ... You can see from the periodic table that carbon has an atomic number of 6, which is its number of protons. The atomic mass of the atom is the mass of the protons plus the mass of the neutrons, 6 + 7, or

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Physics !!!!!!!!!!!!!!!!!

madreJ [45]

Answer:

1) v = -0.89 m/s

2) v = 36.5 m/s

Explanation:

1) Given

The mass of the boy, M = 45 Kg

The mass of the skateboard, m = 2 Kg

The initial velocity of the boy and skateboard is zero

According to the law of conservation of linear momentum

MV + mv = 0

V = - mv/M

Substituting the given values in the above equation

V = -2 x 20/ 45

= -0.89 m/s

Hence, the velocity of the boy, v = -0.89 m/s

2) Given

The mass of the boy, M = 47 Kg

The mass of the skateboard, m = 8 Kg

The initial combined velocity of the boy and skateboard, u = 4.2 m/s

The boy jumped off from the skateboard with velocity, V = -1.3 m/s

According to the law of conservation of momentum,

MV + mv = (M + m)u

v = [(M + m)u - MV] / m

Substituting the given values,

v = [(47 + 8)4.2 - 47(-1.3)] / 8

= 36.5 m/s

Hence, the velocity of the skateboard, v = 36.5 m/s

3 0

4 years ago

Which of the following items has the most inertia while at rest?

dusya [7]

Dog

Because the more mass an object has, the greater it’s inertia.

Mark me Brianliest please:)

8 0

3 years ago

Read 2 more answers

A block with mass M is placed on an inclined plane with slope angle q and is connected to a second hanging block with mass m by

tensa zangetsu [6.8K]

Answer:

The mass of the block m is:

$m=M(sin(\theta)+\mu_{s}cos(\theta))$

Explanation:

Let's analyze the block by parts

For the block M

$T-W_{x}-f_{f}=0$ (1)

Where:

T is the tension
W(x) is the component of the weight in the x-direction
F(f) is the friction force

$T-Mgsin(\theta)-\mu_{s}N=0$

$T-Mgsin(\theta)-\mu_{s}Mgcos(\theta)=0$

For the block m

$T-W=0$

$T=mg$ (2)

Now, let's combines equation (1) and (2):

$mg-Mgsin(\theta)-\mu_{s}Mgcos(\theta)=0$

Finally, let's solve it for block m.

$mg-Mg(sin(\theta)+\mu_{s}cos(\theta))=0$

$m=M(sin(\theta)+\mu_{s}cos(\theta))$

I hope it helps you!

7 0

3 years ago

Choose a tool or a device you can investigate. It must not have any source of power other than the person using it. It must use

andrew11 [14]

Answer:

Wheelbarrows, fishing rods, shovels, brooms, arms, legs, boat oars, crow bars, and bottle openers are all examples of levers. Levers may be one of the most used simple machine. As with all simple machines like the lever, they are designed to help make work easier to do.

Explanation:

8 0

3 years ago

The ability to cause change is defined as:

ehidna [41]

The question is poorly written.
ALL of the choices cause a change in something.

A). Force causes a change in velocity.

B). and C). Power and energy cause changes requiring work.

D). Impulse causes a change in momentum.

5 0

4 years ago