Answer:
I₂ = I₀ 1/4
Explanation:
For this exercise we use the definition of intensity which is the power per unit area
I = P / A
The emitted power is constant, so
P = I A
We can write this equation for the start and end point with index 2
I₀ A₀ = I₂ A₂
I₂ = I₀ A₀ / A₂
The spot area is the area of the circle
A₀ = π r₀²
We substitute
I₂ = I₀ r₀² / r₂²
It indicates that the radius of the spot is twice the initial radius
r₂ = 2 r₀
I₂ = I₀ (r₀ / 2 r₀)²
I₂ = I₀ 1/4
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
Answer:
Below:
Explanation:
It's the definition of "Cognitive Dissonance".
Answer:
false a curciut is just a loop of electricity goes in and negative comes out when using a battery the negative goes in and the goes out making a battery have two sides to a uircute.
hope this helps!
Explanation:
<span>Answer: A. Exercising
above your target heart rate.</span>
The individual's current
level of fitness depends on the amount of exercise needed. I would advise my
friend to exercise above her/his target heart rate to help improve her/his
cardiovascular endurance for an individual has genetically the capacity to
adapt to training, his or her fitness goals, and to the component being
developed such as improve cardiovascular endurance.
<span>In addition, if my friend is
exercising with in or below her/his target heart rate, her/his goal will not be
achieve because her/his stamina and strength will not increase. If she/he will
like to improve her/his cardiovascular endurance, a gradual increase in her/his
workouts must be done. Therefore, she/he must exercise above her/his target heart rate.</span>
<span>
</span>