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4 years ago

Which of the following is NOT a component of Newton’s first law of motion?

Physics

1 answer:

sashaice [31]4 years ago

5 0

Answer:

Explanation:

An object in stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

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An alpha particle is identical to a _____.

djyliett [7]

An alpha particle is identical to a helium nucleus. The correct option among all the options given in the question is option "A". In case of both the alpha particle nucleus and helium nucleus, there are two protons and two neutrons. Alpha particles are generally formed during the process of alpha decay. They can also be produced in other ways.

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3 years ago

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What is the half-life of a radioisotope

nadezda [96]

Half-life is defined as the time it takes for one-half of the atoms of a radioactive material to disintegrate. Half-lives for various radioisotopes can range from a few microseconds to billions of years.

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3 years ago

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The kinetic energy of an object depends on two factors, ___, and ___. HINT: Remember comparing the kinetic energy of the marble

Lisa [10]

D. speed | mass
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3 years ago

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Two soccer players, Mia and Alice, are running as Alice passes the ball to Mia. Mia is running due north with a speed of 5.30 m/

never [62]

Answer:

A. 2.83 m/s

B. 39.55 degrees north of east

Explanation:

The velocity of the ball relative to the ground is the sum vectors of velocity of the ball relative to Mia and the velocity of Mia relative to the ground

If we take north east as positive direction then

Velocity vector of the ball relative to Mia is

$= =$

Velocity of Mia relative to gorund is

<0, 5.3>

So velocity of the ball relative to the ground is

<1.8, -3.12> + <0, 5.3> = <1.8, 2.18>

Its magnitude is:

$v = \sqrt{v_e^2 + v_n^2} = \sqrt{1.8^2 + 2.18^2} = \sqrt{3.24 + 4.7524} = \sqrt{7.9924} = 2.83$ m/s

Its direction is

$tan\alpha = \frac{v_e}{v_n} = \frac{1.8}{2.18} = 0.83$

$\alpha = tan^{-1}0.83 = 0.69 rad \approx 39.55 degrees$ north of east

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3 years ago

Danny is riding his bike at 12m/s he tries to pop a wheelie but he fails hits a curb flies through the air and comes to a comple

maxonik [38]

Answer:

a = -0.4m/s²

Explanation:

v_f = v_I + (a)(t)

a(t) = v_f-v_I

a = (v_f-v_I)/t

a = (0m/s-12m/s)/30s

a = -0.4m/s²

8 0

3 years ago