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Question1
On a humid day, the electric field of 2.00×10^4 N/C is enough to produce sparks about an inch long. Assume that in the physics class, a Van de Graaff generator with a sphere radius of 15.0 cm is producing sparks 6 inches long.
a) Use Gauss's law to compute amount of charge stored on the surface of the sphere sooner than bravely discharge it with the hand.
b) Suppose all charge is concentrated at the center of the sphere, and use Coulomb's law to compute the electric field at the surface of the sphere
Question2
An electron with kinetic energy of 4.0 x 10-16 J is moving to the right along the axis of a cathode-ray tube.
1. There is an electric field = (3.0 x 104 N/C) in the region between the deflection plates. Everywhere as well, = 0.
2. At what angle is an electron moving with respect to the axis? (Positive angle measured counter clockwise with respect to the axis)
3. At what distance from the axis will an electron strike the fluorescent screen?
Two protons are released from rest, one from location 1 and another from location 2. When these two protons reach location 3, what is the electric potential at location 3
Some hydrogen gas is enclosed within a chamber being held at 200 degrees C with a volume of 0.025 m^3. What is the final volume of the container
What is the net entropy change
A 7.80-g bullet moving at 500 m/s penetrates a tree trunk to a depth of 5.40 cm. find the average frictional force that stops the bullet
In a student experiment, a constant-volume gas thermometer is calibrated in liquid nitrogen (?196°C), What value of absolute zero does the calibration yield
Johnny Jumper's favorite trick is to step out of his high-rise window and fall 37.0 m into a pool. Find Johnny's de Broglie wavelength at this moment
A near-sighted person might correct his vision by wearing diverging lenses with focal length f = -60cm. use ray tracing to determine the height of the image
A magnetic field of magnitude 0.38 T is directed vertically upward, Find the magnetic flux through a flat surface of area 22 cm2 if the surface is horizontal
The car now stops, and the four people get out. By how much does the car body rise on its suspension owing to this reduce in weight.
A 0.11-kg rubber ball is dropped onto a table. The speed of the ball right before it hits the table is 5.9 m/s. what is the magnitude of the average force exerted on the ball by the table
Consider a bright star in our night sky. Assume its distance from Earth is 89.4 light-years (ly) and its power output is 4.00 multiply.gif 1028W, Find the intensity of the starlight at the Earth
Assume that the Sun radiates like an ideal thermal source at a temperature of 6000 K, What is the intensity of the solar radiation emitted in the range 550.0 nm to 552.0 nm
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