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3 years ago

the force experienced by an electron in a field between parallel plates is proportional to which of the following?

Physics

1 answer:

Mamont248 [21]3 years ago

7 0

Answer:

The inverse of the distance between the plates.

The potential difference between the plates.

Explanation:

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In the form of radioactive decay known as alpha decay, an unstable nucleus emits a helium-atom nucleus, which is called an alpha

trapecia [35]

Answer:

Velocity will be $v=4.06\times10^7m/sec$

Explanation:

We have given mass of alpha particle m = 4 u $=4\times 1.67\times 10^{-27}kg=6.68\times 10^{-27}kg$

Charge on alpha particle $q=2e=2\times 1.6\times 10^{-19}C=3.2\times 10^{-19}C$

Charge on thorium particle $=90\times 1.6\times 10^{-19}=144\times 10^{-19}C$

Diameter is given as d = 15 fm

So radius $r=\frac{d}{2}=\frac{15}{2}=7.5fm=7.5\times 10^{-15}m$

Potential energy is given by $E=\frac{1}{4\pi \epsilon _0}\frac{q_1q_2}{r}=\frac{Kq_1q_2}{r}=\frac{9\times 10^9\times 144\times 10^{-19}\times 3.2\times 10^{-19}}{7.5\times 10^{-15}}=5.529\times 10^{-12}J$

From energy conservation $\frac{1}{2}mv^2=5.529\times 10^{-12}$

$\frac{1}{2}\times 6.68\times 10^{-27}v^2=5.529\times 10^{-12}$

$v=4.06\times10^7m/sec$

6 0

3 years ago

Newton established his three laws of motion to do what?

marshall27 [118]

Newton established his three laws of motion to understand the motion of objects in a systematic way [ same thing as all Scientists did for human's curiosity ].

His three laws of motion are as follows:

First Law: - An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

Second Law: - The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

Third Law: - For every action, there is an equal and opposite reaction

Hope this helps!

5 0

3 years ago

PLEASE HELP

Rzqust [24]

Race relations throughout history has changed over and over. But as far as the modern world race relations have went through all three. Diversity is far more common now ( which I think is positive) .

7 0

4 years ago

The process of thinking that involves considering an overall general idea or theory and drawing specific conclusions or making s

Alexus [3.1K]

Answer:

Deductive reasoning

Explanation:

deductive reasoning

the process of thinking that involves considering an overall general idea or theory and drawing specific conclusions or making specific predictions about it

4 0

3 years ago

an object is sliding down in clean plane the velocity change at a constant rate from 10 cm to 15 CM in 2 second what is it accel

AlekseyPX

Initial velocity=10m/s=u

Final velocity=v=15m/s

Time=t=2s

$\boxed{\sf Acceleration=\dfrac{v-u}{t}}$