Answer:
angle of twist of the bar is 3.32 ×
degree
Explanation:
given data
torque t = 571 lb-ft = 774.172 Nm
g = 18,431, 356 lb/ in² = 1.27 ×
Pa
d1 = 8.1 in = 0.205 m
d2 = 1.8 in = 0.045 m
L = 3.1 ft = 0.944 m
to find out
angle of twist of the bar
solution
first we get here polar moment that is express as
polar moment =
...........1
here do is outer diameter that is 0.205 m and d1 is inner diameter i.e 0.045 m
put here value we get
polar moment = 
polar moment = 173.006 ×
now we get here angle that is
angle =
..............2
here T is torque and L is length and J is polar moment and G is share modulus
put these value in equation 2 we get
angle =
angle = 3.32 ×
degree
Redox reactions involve the gain or loss of C. electrons
Answer:
87000 J ;
200 J
Explanation:
Workdone = mgh
Weight = mg = 290kN = 290 * 1000=290000 N
h = distance = 30 cm = 0.3 m
Workdone = 290000 * 0.3
Workdone = 87000 J
B.)
Workdone = Force * distance
Force = 4000 N
Distance, d = 5 cm = 0.05 m
Workdone by the woman, W = 4000N * 0.05m
W = 200Nm = 200 J
It's about 6 minutes, as I seem to recall. Sort of the time for the earth to go into shadow darkness when there's an eclipse ???
A good way to determine the property of a substance would be it's boiling and melting point, its conductivity, and how hard or soft that substance is.