A 500 N passenger weighs 24500 N elevator that rises 30 m in exactly 1 minute how much power is needed for the elevators trip
1 answer:
Answer:
12500 W (12.5 kW)
Explanation:
The total weight of the passenger + elevator is
The total work done to rise the elevator + passenger is equal to the product between the total weight and the distance covered during the trip (d = 30 m):
The power needed for the trip is equal to the ratio between the work done (W) and the time taken (t):
Since the time taken is t = 1 min = 60 s, the power needed is
You might be interested in
Answer:
51.96 years
2) 30 million of years
Explanation:
First we must know the travel time of the ship seen from the earth. The spaceship travels at half the speed of light, this means that the amount of time the spacecraft must spend to travel the same distance is double compared to the light, that is 60 years.
Now due to the speed of the ship, we must take into account relativistic effects, such as time dilation, this is given by:
Where t is the time measured in the ship, t' is the time measured in the earth, inertially moving with velocity v.
Rewriting for t:
This is the amount of time it would take you reach the Whirlpool galaxy in the spaceship.
2) a light year is a measure of distance, which indicates the kilometers that light travels in a year. Thus, the light emitted by Whirlpool galaxy takes 30 million of years reaches our planet.
Answer:
<h2>Magnetic field required for the given induced EMF is 1.41 T</h2>Explanation:
Potential difference across the blood vessel is given as
here we know that the speed is given as
now we have
Now volume flow rate of the blood is given as
from above equation we have
Now we have