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Nataly [62]
4 years ago
5

A ball is dropped off a 20.5 meter rooftop. What will the velocity of the ball just before it hits the ground?

Physics
1 answer:
ololo11 [35]4 years ago
4 0

Answer:

6.40 m/s

Explanation:

Here we have to consider the conservation of energy

Potential energy of a object = Kinetic Energy

Mgh = 1/2 M (v)2

V = root 2gh

V = root 2*10*20.5

V = 6.40 m/s

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4 years ago
A truck is speeding up as it travels on an interstate. The truck's momentum (in kg · m/s) is proportional to the truck's speed (
serious [3.7K]

Answer:

a)48300 times

b)P = 821100  kg · m/s

Explanation:

Given that

m = 48300 kg

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So we can say that truck momentum is 48300 times its velocity.

Now given that

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4 years ago
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In example 20.3 in the text, the net force on a 1.0 nC charge located between two 10 nC charges is calculated. How would the ans
VashaNatasha [74]

Answer:

The forces experienced by the middle particle are attractive, and the net force will remain the same (0) if and only if the distances of the sides particles to the middle particle are the same.

Explanation:

In example 20.3 the forces experienced by the middle particle are repulsive because all the particles are positive, for the case in which the particles on the sides are replaced for negative charge particles the forces experienced by the middle particle are attractive. Regarding the net force, because we don't know the distances we can not give a definitive answer, what we can say is that if the distances from the middle particle to the sides particles are the same the net force is zero for both cases (remain unchanged).  

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4 years ago
Gravity will have a greater effect on an object with
prohojiy [21]

The correct option is B. More mass

Hope this helps you

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7 0
3 years ago
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A 149 turn 149 turn circular coil of radius 2.15 cm 2.15 cm is immersed in a uniform magnetic field that is perpendicular to the
adoni [48]

Answer:

Explanation:

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radius, r = 2.15 cm

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e = 0.058 V

4 0
3 years ago
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