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3 years ago

Why can beta particles pass through materials more easily than alpha particles? (2 points)

Physics

2 answers:

never [62]3 years ago

5 0

Beta particles are smaller

Hunter-Best [27]3 years ago

3 0

Answer:

Beta particles are smaller.

Explanation:

When an unstable nuclei will break into stable nuclei then the nucleus energy of the unstable nuclei will be given to the the fast moving beta particles.

These beta particles are same as electron as they are negatively charged whose magnitude of charge is same as that of electrons charge.

so we have

$\beta^- = -1.6 \times 10^{-19} C$

now since electrons are smaller in size as we compare it with alpha particles so we can say that the beta particles can penetrate to more depth then the alpha particles

so here correct answer would be

Beta particles are smaller.

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A man of 60kg moves in a lift of constant velocity 5m/s .What is the reactive force acting on the man by the elevator?

Flauer [41]

Answer:

588 N

Explanation:

Since the 60 kg is moving at a constant velocity there is no acceleration. In order for the system to be balanced, both the normal force and the force of gravity must be equal. In this case the man has a mass of 60 kg. So to find the force you multiply mass by gravitys constant (9.81). And you end up with an answer of 588.6 but I rounded to 588.

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In a circus act, a 70 kg clown is shot from a cannon with an initial velocity of 17 m/s at some unknown angle above the horizont

EleoNora [17]

Answer:

$K_{2}=7302.4J$

Explanation:

Given the initial velocity of the clown, his mass and final height we can calculate the final kinetic energy using the <em><u>conservation of total mechanical energy</u></em>

$K_{1}+U_{1}=K_{2}+U_{2}$

$K_{2}=K_{1}+U_{1}-U_{2}$

$K_{2}=\frac{1}{2}mv_{1}^{2}+mgh_{1}-mgh_{2}$

Since $h_{1}=0$

$K_{2}=\frac{1}{2}mv_{1}^{2}-mgh_{2}$

$K_{2}=\frac{1}{2}(70kg)(17m/s)^2-(70kg)(9.8m/s^2)(4.1m)=7302.4J$

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3 years ago

Why can't alpha particles penetrate deeply into solids? Alpha particles have low mass. Alpha particles have high mass. Alpha par

Juliette [100K]

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So the answer, I believe, is B. Alpha particles have high mass.

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As an electron moves through a region of space, its speed decreases from 6.03 × 106 m/s to 2.45 × 106 m/s. the electric force is

yuradex [85]

Answer:

a) It moved to a lower potential

b) ΔФ = - 86.28 Volt

Explanation:

The energy of an charged particle and the electric potential are related by the potential al kinetic energies:

$\frac{\text{mv}^2}{2} = e\phi$

If we consider an electron:

m = 9.10938*10^-31 Kilogram

e = 1.60218*10^-19 Coulomb

And the potential diference may be calculed by:

$\Delta \phi =\frac{m \left(v_f^2-v_i^2\right)}{2 e}$

Replacing all the values we get:

ΔФ = - 86.28 (Kilogram Meter^2)/(Coulomb Second^2) = -86.28 Volts

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