Answer:
the air is being stopped in the pocket of the parachutes theys why the parachute has a certain shape so that the air that gets caught inside of it as the skydiver goes down slows down the landing
Answer:
Explanation:
Expression for emf induced = 1 /2 B n r²ω where B is magnetic field , r is radius of the coil and ω is angular velocity of rotation , n is no of turn .
ω = 2πf = 2π x 60 = 120 π ; where f is frequency of rotation .
emf induced = 1 /2 B r²x 120π x n
Putting the given values
10000 = .5 x B x .11² x 120 x 3.14 x 506
B = 8.67 T .
Answer:
A truck weighing 3.0 × 104
newtons was driven up a
hill that is 1.6 × 103
meters long to a level area that
is 8.0 × 102
meters above the starting point. If the
trip took 480 seconds, what was the minimum power
required?
Explanation:
the answer is 1292.8
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Answer:
Explanation:
Given

And a torque of 50 N.m is applied thus

![50=\frac{1}{3}\left [ 5\times 10^{-2}\right ]^3](https://tex.z-dn.net/?f=50%3D%5Cfrac%7B1%7D%7B3%7D%5Cleft%20%5B%205%5Ctimes%2010%5E%7B-2%7D%5Cright%20%5D%5E3)

T at a distance x is given


For Angle of twist



G=75 GPa


Answer:
<em>P = 1.8 Watt</em>
Explanation:
<u>Electromotive Force (EMF)</u>
It consists of a DC source ε with small internal resistance Ri. When it's connected to an external resistance Re a current i flows by the circuit whose value is given by:

The internal resistance of the battery is Ri=1 ohm and its emf is ε=12 V. When connected to an external resistance of Re=79 ohm, the current is:

i = 0.15 A
The power delivered by the battery is:
P = ε.i
P = 12 V * 0.15 A
P = 1.8 Watt