Answer:
For the calculation of I = Erms2 / (cμ0), I get
I = (91.5 / √2)2 / [(2.99 x 108) (1.26 x 10-6)] = 11.07 W/m2
<u>
Intensity = 11.07 w/m^2</u>
t = 17.1 s
A = 0.0229 m2
U = energy = IAt = (11.07) (0.0229) (17.1) J = 4.34 J
<u>Energy = 4.34 Joules</u>
Answer:
225 000 kilometers per second.
Answer:
The velocity of the cart when it reaches its greatest y coordinates is 10.135m/s
Explanation:Vx=0
0=6.8m/s+(6.2m/s^2)t
t=6.8/6.2
t= 1.1secs
Vy= 12m/s +(-1.7m/s^2 )t
Vy=12 +(-1.7×1.1)
Vy=12 -1.865)
Vy=10.135m/s
Answer:
Explanation:
E₀ = 229.1 V/m
E = E₀ / √2 = 229.1 / 1.414 = 162 V/m
B = E / c ( c is velocity of em waves )
= 162 / (3 x 10⁸) = 54 x 10⁻⁸ T
rate of energy flow = ( E x B ) / μ₀
= 162 x 54 x 10⁻⁸ / 4π x 10⁻⁷
= 69.65 W per m².
I apologise if this is confusing, if it doesn’t make sense just comment and I’ll try to explain it better. :)
Let’s seperate the four directions into two categories: north + south, and east + west.
John’s movements in regards to a north/south direction over the course of the entire placement:
8 north, 8 south (6 + 2 steps = 8 steps south)
In total, John moved both north and south 8 times each.
8 - 8 = 0, therefore canceling out any north/south movement. At this stage, John has not moved from his starting position.
John’s movement in regards to east/west:
6 west, 3 east.
Since he has not moved an equal amount of steps west and east means he HAS moved from his starting point.
In order to find John’s displacement, we must take his east steps from his west steps.
6 - 3 = 3
This means John’s displacement from his starting point is 3 steps west.