A sailor strikes the side of his ship just below the surface of the sea. He hears the echo of the wave reflected from the ocean
1 answer:
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The electrostatic force between two charges is given by
where
ke is the Coulomb's constant
q1 and q2 are the two charges
r is the separation between the charges
In our problem,
Therefore the electrostatic force is
where
ke is the Coulomb's constant
q1 and q2 are the two charges
r is the separation between the charges
In our problem,
Therefore the electrostatic force is
Answer:
increases by a factor of
Explanation:
First we need to find the initial velocity for it to stop at the distance 2d using the following equation of motion:
where v = 0 m/s is the final velocity of the package when it stops, is the initial velocity of the package when it, a is the deceleration, and
is the distance traveled.
So the equation above can be simplified and plug in Δs = d, for the 1st case
(1)
For the 2nd scenario where the ramp is changed and distance becomes 2d,
(2)
let equation (2) divided by (1) we have:
So the initial speed increases by . If the deceleration a stays the same and time is the ratio of speed over acceleration a
The time would increase by a factor of
Answer:
363000 J or 363 kJ
Explanation:
Because the car is not rotating, it has no rotational kinetic energy. Its kinetic energy is then simply