Discuss the meanings of the words "potential" and "potential difference". How are they similar and how are they different? How do these words fit in with the term "voltage"?
This question was already asked but the answer to it doesn't address all the parts of the question.
In: Physics
Briefly describe what a wavefunction is. Use the term “boundary condition” in your answer. State 2 properties of wavefunctions. Give 2 examples of physical systems that would be described by wavefunctions.
In: Physics
A fireworks rocket is moving at a speed of v = 45.7 m/s. The rocket suddenly breaks into two pieces of equal mass, which fly off with velocities v1 at an angle of theta1 = 30.7° and v2 at an angle of theta2 = 59.3° as shown in the drawing below.
In: Physics
1) Two small, identical objects have charges of 6 μC and -3 μC. If the objects are 13 cm apart, what is the electric force the objects exert on each other? (in N)
- 7.99x10^5
- 9.59
- 4.79
- 1.20
- 3.20x10^6
2) Now imagine that the two small, identical objects with charges of 6 μC (Object A) and -3 μC (Object B) are CONDUCTORS. If the objects are brought together so they touch, then separated, what is the amount of charge on each object?
- Object A has 3.00 μC, Object B has 3.00 μC
- Object A has 6.00 μC, Object B has -3.00 μC
- Object A has 1.50 μC, Object B has 1.50 μC
- Object A has 3.00 μC, Object B has 0 μC
- Object A has -3.00 μC, Object B has 6.00 μC
3) Two small, identical conductors have charges of 6 μC and -3 μC. If the objects are brought together so they touch, then separated so they are 13 cm apart, what is the electric force the conductors exert on each other? (in N)
- 9.59
- 1.20
- 7.99x10^5
- 3.20x10^6
-4.79
In: Physics
The figure shows an initially stationary block of mass m on a floor. A force of magnitude 0.500mg is then applied at upward angle ? = 20
In: Physics
In: Physics
Charged Spheres #1 Charged spheres are placed as follows:
|
Name |
charge (μC) |
x location (m) |
y location (m) |
|
A |
+7.0 |
0.0 |
0.0 |
|
B |
-8.0 |
-2.0 |
3.0 |
Determine the electric field (x and y components) created by charge A at the location (-2.0, 0.0).
Determine the electric field (x and y components) created by charge B at the location (-2.0, 0.0).
Determine the net electric field (x and y components) at the location (-2.0, 0.0).
Determine the net electric field (magnitude and direction) at the location (-2.0, 0.0).
Determine the electric force (magnitude and direction) on an electron placed at the location (-2.0, 0.0). Do not use Coulomb’s law to do so. If you do, then you will get a zero on this assignment.
In: Physics
In: Physics
An aluminum rod with a square cross section is 1.2 m long and 5.0 mm on edge. (a) What is the resistance between its ends? (b) What must be the diameter of a cylindrical copper rod of length 1.2 m if its resistance is to be the same as that of the aluminum rod? The resistivity of aluminum is 2.75 × 10-8 Ω·m and the resistivity of copper is 1.69 × 10-8 Ω·m.
In: Physics
Given a 2.00 μF capacitor, a 5.25 μF capacitor, and a 2.50 V battery, find the charge on each capacitor if you connect them in the following ways.
(a) in series across the battery 2.00 μF capacitor μC 5.25 μF capacitor
(b) in parallel across the battery 2.00 μF capacitor μC 5.25 μF capacitor
In: Physics
250 mL of water at 20.0 ∘C is placed in the freezer compartment of a refrigerator with a coefficient of performance of 4.00. How much heat energy is exhausted into the room as the water is changed to ice at -5.00 ∘C?
In: Physics
How do you relate the principle of Superposition to sound? Why does some people in a big room, hear quiet sound?
In: Physics
Describe two methods of determining the whole volume of a wooden rod
In: Physics
An object has a mass in air of 0.0832 kg, apparent mass in water of 0.0673 kg, and apparent mass in another liquid of 0.0718 kg. What is the specific gravity of the other liquid?
In: Physics
In the “old days”, televisions were made from Cathode Ray Tubes
whereby a beam of
electrons rapidly swept across the inside of the screen as a result
of strategic deflections
from magnetic fields acting on the beam. Suppose that Frank has a
massive 2000 inch
TV in which the image has to be updated 100 times per second (to
minimize the
appearance of “flicker”) and that there are 100,000 rows.
(a) Show that the electron beam moves across the screen with a
speed v c .
(b) Explain why this superluminal speed does not contradict
relativity. In particular, why
can’t information be transmitted from one side of the screen to the
other with v c ?
In: Physics