Answer:
5 watts
power = work done ÷ time taken
10 j ÷ 2 = 5w
Answer:
the question has some missing details i.e E = E0sin(kx -wt)y and B = B0sin(kx -wt)z
The variables E0 and B0 are the amplitudes.
option C is correct.
Explanation:
Compare the equation given with the general wave equation ; Y = Asin(kx - wt)
Where A is the amplitude
Answer:
It takes 11.20 ms for the sphere to increase in potential by 1260 V
Explanation:
Using the formula q = It where I is current in Ampere, and t is in seconds
q = ( 1.000002 - 1.0000000) t
q = 0.000002t
Voltage on the surface of the sphere V = Kq / r
where K is 9.0 × 10⁹ N².m² / c² and
R = 16 cm = 16 /100 = 0.16m
V = Kq /r
substitute the value into q
V = K(0.000002t) / r
cross multiply
rV = K × 0.000002t
make t subject of the formula
t = 0.16 × 1260 / ( 9×10⁹ × 0.000002)
t = 201.6 / ( 18 × 10³)
t = 0.0112 s
= 11.20 ms
It takes 11.20 ms for the sphere to increase in potential by 1260 V
use of crowbar
It is used as a lever either to force apart two objects or to remove nails. Crowbars are commonly used to open nailed wooden crates. Common uses for larger crowbars are: removing nails, prying apart boards, and generally breaking things.
use of wheel barrow
Wheelbarrows are used for a variety of things, such as moving rock, mulch or compost to the garden, moving trees or large shrubs from one spot to another, hauling bricks, disposing of garden debris, or even for mixing concrete or fertilizers.