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denis-greek [22]
2 years ago
5

Please Help!!!!!!!!!!!!!!!!!!!!!!!!!

Physics
1 answer:
UkoKoshka [18]2 years ago
5 0
3=A,2=B, 4=E, 5=D, 1=C I think this is the answer.
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An alpha particle (a helium nucleus, consisting of two protons and two neutrons) has a radius of approximately 1.6 × 10-15 m. A
Snezhnost [94]

Answer:

9.96x10^-20 kg-m/s

Explanation:

Momentum p is the product of mass and velocity, i.e

P = mv

Alpha particles, like helium nuclei, have a net spin of zero. Due to the mechanism of their production in standard alpha radioactive decay, alpha particles generally have a kinetic energy of about 5 MeV, and a velocity in the vicinity of 5% the speed of light.

From this we calculate the speed as

v = 5% 0f 3x10^8 m/s (speed of light)

v = 1.5x10^7 m/s

The mass of an alpha particle is approximately 6.64×10−27 kg

Therefore,

P = 1.5x10^7 x 6.64×10^−27

P = 9.96x10^-20 kg-m/s

8 0
2 years ago
A ball is thrown straight up with a speed of 30 m/s, and air resistance is negligible. How long does it take the ball to reach t
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Answer:

3 seconds

Explanation:

Applying,

Applying,

v = u±gt................ Equation 1

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From the question,

Given: v = 0 m/s ( at the maximum height), u = 30 m/s

Constant: g = -10 m/s

Substitute these values into equation 1

0 = 30-10t

10t = 30

t = 30/10

t = 3 seconds

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A car moves around a circular track at a constant rate. What must change?
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B. only its velocity should change

4 0
2 years ago
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Find the relation, time velocity graph : acceleration of an object, time position graph : ?
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In a time-position graph (s-t graph):

slope = velocity

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slope = acceleration

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In a time-acceleration graph (a-t graph):

area under graph = change in velocity

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Which phase of matter makes up stars?
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I believe it’s gas because that’s all that stars are really made of
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