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sergey [27]
3 years ago
6

A 50kg car is moving at a velocity of 4 m/s. After a collision, the car is moving at a velocity of 5m/s.

Physics
1 answer:
earnstyle [38]3 years ago
8 0

Answer:

Explanation:

The equation for momentum is p = mv; therefore,

p1 = 50(4) so

p1 = 200

p2 = 50(5) so

p2 = 250

The impulse, the change in the momentum, is 50, going in the same direction.

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Answer:

they'll be black, because green absorbs red.

Explanation:

any color which absorbs red will appear "black", i.e. green, blue, black

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3 years ago
How far from a -7.80 μC point charge must a 2.40 μC point charge be placed in order for the electric potential energy of the pai
Naddik [55]

Answer:

Distance between two point charges, r = 0.336 meters

Explanation:

Given that,

Charge 1, q_1=-7.8\ \mu C=-7.8\times 10^{-6}\ C

Charge 2, q_2=2.4\ \mu C=2.4\times 10^{-6}\ C

Electric potential energy, U = -0.5 J

The electric potential energy at a point r is given by :

U=k\dfrac{q_1q_2}{r}

r=k\dfrac{q_1q_2}{U}

r=9\times 10^9\times \dfrac{-7.8\times 10^{-6}\times 2.4\times 10^{-6}}{-0.5}

r = 0.336 meters

So, the distance between two point charges is 0.336 meters. Hence, this is the required solution.

8 0
3 years ago
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mars1129 [50]
Rocket thrust equation
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In this case, by Newton 3rd’s law,

Force exerted by gas on rocket
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Answer:

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3 years ago
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