W=f*d = 5000N * 10 stories * each 4m = 200 000 J
A)
2revs in 0.08s
so in 1s thats 25revs
therefore thats <u>50π radians</u> in one second
b)
well, ω=2π/T
therefore ω=50π = 157.079rads^-1
and v=rω where r is in meters;
v=0.3x157.079
<u>v=47.123ms^-1</u>
c)
f=1/T
f=1/period for one rotation
1 rotation = 0.08/2 = 0.04
f=1/0.04
<u>f=25Hz</u>
Answer: crystals
Explanation: intrusive igneous rocks are formed by slow cooling magma which contain crystals
The complete cycle of lunar phases has a period of 29.531 days.
You've described two phases that are separated by 1/4 of the
complete cycle.
If the moon is exactly at First Quarter (half-full and getting bigger)
at, let's say, 12:00 Noon on November 2 where you are, then it will
be Full after
29.531 days / 4 = 7 days 9 hours 11 minutes .
That's 9:11 PM on November 9 .
