Answer:
4.73V
Explanation:
Parameters given:
Radius of sphere = 65.7 cm = 0.657 m
Electric field = 7.2 * 10^5 V/m
Electric potential, V, is given in terms of Electric field as:
V = E * r
Where r = distance between charge and point of consideration.
Since we are considering a point just outside the spherical conductor:
V = 7.2 * 10^5 * 0.657
V = 4.73V
Answer:
De broglie wavelength will be 0.727 nm
Explanation:
We have given speed of the electron 
Mass of the electron 
Plank's constant 
We have to find the De Broglie wavelength
De Broglie wavelength is given by 
So wavelength will be 0.727 nm
Three
The ray of light will come out of the glass at 90 degrees to the normal. What goes in is called the critical angle. At 90 degrees the ray will reflect rather than refract. This is just for interest.
<em><u>Formula</u></em>
n2 * sin(θ2) = n1* sin(θ1)
<em><u>Givens</u></em>
θ2 = 90 degrees
n2 = 1
n1 = ?
θ1 = 43.6
<em><u>Solution</u></em>
n1 * sin(43.6) = 1 * 1
n1 = 1/sin(43.6)
n1 = 1/0.6896
n1 = 1.45
Four
This problem is very instructive. It uses a little known trick so that you don't have to know the exact speed of light of one of the speeds. The other speed is compared to it. You could do it the long way and figure out the speeds in crown glass from air to the crown glass, and do the same thing with the other color. That would work. An easier way is not to bother. Call the speed of one of the colors = 1. Is the other speed greater or less than 1? We'll see.
The next thing you have to realize is that the speed is going to be highest for either red or violet. That's because n is highest for violet and lowest for red. The intermediate colors don't matter. So the answer is either A or B.
They have n's between violet and red and so they will not be an answer. That means you can eliminate green and yellow (answers C and D).
<em><u>Formula</u></em>
v1/v2 = n2/n1
<em><u>Givens</u></em>
v1 = 1 (we'll say this is red)
v2 = ? (this is violet)
n2 = 1.62 for red. This is probably not exact, but it does not have to be. You just have to notice that violet is higher
n1 = 1.65 for violet. So you are trying to solve the relative speed of v2.
<em><u>Solution</u></em>
v1/v2 = n2/n1
1/v2 = 1.65/1.62 Cross multiply
1.65 * v2 = 1 * 1.62 Divide by 1.65
v2 = 1.62/1.65
v2 = 0.98
<em><u>Conclusion</u></em>.
The speed of violet is going to be slower than the speed of red.
Rule: the higher the index of refraction, the lower the speed.
Answer: red has the greater speed.
The answer is actually 36 J.
Hope this helped :)
Brainliest?
Answer:
It governs the sealing effect of oils and the rate of oil consumption as well as determines the ease with which machines may be started or operated under varying temperature conditions, particularly in cold climates. viscosity is a measure of an oil's resistance to flow.
Explanation:
