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nikdorinn [45]
3 years ago
6

Which of the following is the most important difference between a permanent magnet and a electromagnet

Physics
1 answer:
Ira Lisetskai [31]3 years ago
5 0

Answer:

Explanation: the major difference between an electromagnet and permanent magnet is that the former can have a magnetic field when electric current flows through it and disappears when the flow of the current stops. ... It will always displays the magnetic behaviour.

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3 years ago
The pirate ship tie at the amusement park is a giant pendulum that riders sit in. It swings back and forth, with a maximum veloc
kkurt [141]

Here as we know that there is no loss of energy

so we can say that maximum kinetic energy will become gravitational potential energy at its maximum height

So here we have

\frac{1}{2}mv^2 = mgh

here we have

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now from above equation we have

\frac{1}{2}(8000)(20^2) = (8000)(9.8)h

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3 years ago
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7 0
3 years ago
A truck is moving with a certain uniform velocity. It is accelerated uniformly by 0.75 m/s^2. After 20 seconds , the velocity be
scoundrel [369]

Answer:

Vi = 5 m/s

Explanation:

let (a) acceleration = 0.75 m/s²

(t) time = 20 seconds

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find Initial velocity (Vi)

       Vf - Vi

a =  -----------

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Vi = Vf - (a * t)  = 20 - (0.75 * 20)

Vi = 5 m/s

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3 years ago
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