Given:
Shaft Power, P = 7.46 kW = 7460 W
Speed, N = 1200 rpm
Shearing stress of shaft, = 30 MPa
Shearing stress of key, = 240 MPa
width of key, w =
d is shaft diameter
Solution:
Torque, T =
where,
= 59.365 N-m
Now,
d = 0.0216 m
Now,
w = = = 5.4 mm
Now, for shear stress in key
=
we know that
T = = F.
⇒ =
⇒ =
length of the rectangular key, l = 4.078 mm
Explanation:
Isotopes are atoms with different atomic masses which have the same atomic number. The atoms of different isotopes are atoms of the same chemical element; they differ in the number of neutrons in the nucleus.
Answer:
Half of the moon or 50%
Explanation:
The first quarter phase of the moon is when the Sun illuminates the half part of the moon while the other half rest in darkness.
In the first quarter phase of the moon, the illumination on the moon surface keeps on rising.
When the new moon appear, there is no illumination while the illumination is 100 % on Full moon.
For the phases of crescent moon, it ranges from 0 - 50% and then for gibbous phase, the range of the illumination is from 50-100%from new
Let denote the position vector of the ball hit by player A. Then this vector has components
where is the magnitude of the acceleration due to gravity. Use the vertical component to find the time at which ball A reaches the ground:
The horizontal position of the ball after 0.49 seconds is
So player B wants to apply a velocity such that the ball travels a distance of about 12 meters from where it is hit. The position vector of the ball hit by player B has
Again, we solve for the time it takes the ball to reach the ground:
After this time, we expect a horizontal displacement of 12 meters, so that satisfies