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3 years ago

*5. What is the mass number of a magnesium atom, Mg that has 12 neutrons?

Physics

1 answer:

elena-s [515]3 years ago

5 0

Answer:

Explanation:

24.305 of atomic mass has 12 neutrons

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A particle of mass 4.0 kg is constrained to move along the x-axis under a single force F(x) = −cx3 , where c = 8.0 N/m3 . The pa

Pie

Answer:4.58 m/s

Explanation:

Given

mass of Particle $m=4 kg$

$F=-cx^3$

$a=\frac{F}{m}$

$a=-\frac{cx^3}{m}$

$a=-\frac{8x^3}{4}$

$a=-2x^3$

$v\frac{\mathrm{d} v}{\mathrm{d} x}=-2x^3$

$vdv=-2x^3dx$

integrating

$\int_{6}^{v_b}vdv=\int_{1}^{-2}-2x^3dx$

$\frac{v_b^2-6^2}{2}=-\frac{1}{2}\left [ \left ( -2\right )^4-\left ( 1\right )^4\right ]$

$\frac{v_b^2-36}{2}=-0.5\times 15$

$v_b^2=36-15$

$v_b=\sqrt{21}$

$v_b=4.58 m/s$

6 0

2 years ago

The the symptoms and treatments for these common nervous system

kykrilka [37]

Answer:

the symptoms are cough, cold, cattah and the treatment is antibiotics

7 0

2 years ago

In the given arrangement, the normal force applied by block on the ground is

barxatty [35]

Answer:

The normal force applied by block on the ground is (mg - F cosФ)

Explanation:

Lets explain how to solve the problem

At first you must distribute the force F into two components

Vertical component which is F cosФ

Horizontal component which is F sinФ

The block is in equilibrium, that means sum of forces acting on the

block is zero

So the upward forces equal the downward forces

Normal reaction force R applied by block on the ground and the

vertical component of F both are upward forces

The weight of the block is downward force

The normal reaction force R plus the vertical component of F is

equal to the weight

R + F cosФ = W

W = mg, where g is acceleration of gravity and m is the mass of

the block

R + F cosФ = mg

Subtract F cosФ from both sides

R = mg - F cosФ

The normal force applied by block on the ground is (mg - F cosФ)

7 0

3 years ago

A pupil wants to find the density of an oil. She uses a chemical balance which measures to the nearest gram (g). She places an e

scoray [572]

Answer:

2.29g/cm3.

Explanation:

The following data were obtained from the question.

Mass of the oil = 172g

Volume of oil = 75cm3

Density =..?

Density of a substance is simply defined as the mass of the substance per unit volume of the substance. It is represented mathematically as:

Density = Mass /volume

With the above formula, we can calculate the density of the oil as shown below:

Density = Mass /volume

Density = 172g/75cm3

Density = 2.29g/cm3.

Therefore, the density of the oil is 2.29g/cm3.

5 0

3 years ago

¿Qué valor tiene la resistencia eléctrica de un cable de cobre, si por él viaja una carga de 100 [C] en 60 segundos, si se encue

solong [7]

I’m sorry but imma need a translater cause I can’t understand you

4 0

3 years ago