- #1
Soaring Crane
- 469
- 0
The intensity of a spherical wave is 21 W/m^2 at a distance 16 m away from a constantly emitting source. What will it be 3 m away?
Using the formula
I_2/I_1 = (r_1)^2/(r_2)^2
I got 588 W/m^2 0r 600. Correct?
If the length of pendulum with T = 10 s were halved, what would be its new T?
My answer was 7.1. Correct?
Halved scenario:
T = 2pi*sqrt(L/2g)
but first find original L with
10 s = 2pi*sqrt(L/9.8) to plug in.
Thanks
Using the formula
I_2/I_1 = (r_1)^2/(r_2)^2
I got 588 W/m^2 0r 600. Correct?
If the length of pendulum with T = 10 s were halved, what would be its new T?
My answer was 7.1. Correct?
Halved scenario:
T = 2pi*sqrt(L/2g)
but first find original L with
10 s = 2pi*sqrt(L/9.8) to plug in.
Thanks