Elastic energy (E1) stored in the spring when it is stretched by x :
<span>=1/2kx^2=1.5J </span>
<span>when it is stretched 3 times more=>x becomes 3x
</span>so
<span>E2=1/2k(3x)^2 </span>
<span>=1/2k{9x^2} </span>
<span>=9{1/2kx^2} </span>
<span>={(E1}</span>
<span>=9{1.5} </span>
<span>=13.5J
hope it helps</span>
:<span> </span><span>Under the assumption that a cell is made up of two concentric spheres you find the surface are of the inside sphere which will be your A.
You already have your separation and dielectric constant so just use the formula you stated towards the end of your question and you get 8.93x10^-11 Farads which is about 89pF</span>
A slice of pizza if you really needed help
Answer:
R = 9.85 ohm , r = 0.85 ohm
Explanation:
Let the two resistances by r and R.
when they are connected in series:
V = 12 V
i = 1.12 A
The equivalent resistance when they are connected in series is
Rs = r + R
So, By using Ohm's law
V = i Rs
Rs = V / i = 12 / 1.12 = 10.7 ohm
R + r = 10.7 ohm .... (1)
When they are connected in parallel:
V = 12 V
i = 9.39 A
The equivalent resistance when they are connected in parallel
So, By using Ohm's law
V = i Rp
Rp = V / i = 12 / 9.39 = 1.28 ohm
.... (2)
by substituting the value of R + r from equation (1) in equation (2), we get
r R = 8.36 ..... (3)
..... (4)
By solvng equation (1) and (4), we get
R = 9.85 ohm , r = 0.85 ohm
Answer: The mass of the jet is 26,225
Explanation: Convert 250km to m =250,000
1 hour = 3600
Velocity = 69.4 m/s
a= change in v/change in t
69.4/2 = 34.7
9.10×105 / 34.7 = 26,225 KG
Yw and pls mark me as brainiest