Two point charges 1.8 cm apart have an electric potential energy -180 μJ . The total charge is 31 nC

What are the two charges? Answer in nC

A 32.0-μF capacitor is connected to a 53.0-Ω resistor and a generator whose rms output is 30.0 V at 60.0 Hz.

(a) Find the rms current in the circuit.
______ A

(b) Find the rms voltage drop across the resistor.
______ V

(c) Find the rms voltage drop across the capacitor.
_______ V

(d) Find the phase angle for the circuit.
The voltage _______ leads ahead of lags behind the current by _____°.

An argon laser that has a wavelength of 455 nm shines on a double-slit apparatus, which produces an interference pattern on a screen that is 10.0 m away from the slits. The slit separation distance is 70.0 μm. (a) How many bright fringes are there on the screen within an angle of ±1° relative to the central axis? (b) How many dark fringes are there on the screen within an angle of ±2° relative to the central axis? Be careful to count all the fringes.

answer: a) 5 b)8, please explain how to get these correct answers.

Tipler6 24.P.053.soln.

A 90-pF capacitor and a 360-pF capacitor are both charged to 2.50 kV. They are then disconnected from the voltage source and are connected together, positive plate to negative plate and negative plate to positive plate.

(a) Find the resulting potential difference across each capacitor.

(b) Find the energy lost when the connections are made.
µJ

Calculate the gauge pressure (in Pa) inside a soap bubble 2.4 cm in radius using the surface tension γ = 0.022 N/m for the solution. Enter a number with one digit behind the decimal point.

A cannon fires a cannon ball at an angle of θ0 = 30.0° above the horizontal axis. The initial speed of the ball is 395 m/s . Ignore air resistance for all calculations.

A) Find the maximum height h that the ball attains.

B) Find the horizontal distance (range) R the cannon ball would travel given the above (the same as for Part A) conditions.

very massive black holes with masses of Billions of solar masses are primarily formed how?

What properties of a Black Hole can you determine theoretically

What can you say about Hawking radiation?

What is the engine in an AGN

A cue ball traveling at 5.93 m/s makes a glancing, elastic collision with a target ball of equal mass that is initially at rest. The cue ball is deflected so that it makes an angle of 30.0° with its original direction of travel.

(a) Find the angle between the velocity vectors of the two balls after the collision.

(b) Find the speed of each ball after the collision.

Electrons with a speed of 1.1

1. Is momentum conserved in all of the experiments? Please give a complete description with examples as needed supporting your response.

2.Is kinetic energy conserved in all of the experiments? Please give a complete description with examples as needed supporting your response.

3. Does friction affect this experiment? If so, how? If not, why not?
4. If the track were not perfectly level, how would your results change if at all?
5. How might this experiment be improved to illustrate better the concepts of conservation of momentum and kinetic energy?

, on a hill. Dr. L., Jimmie and Kepler (Total mass = MT ) are all on a massless sled together. They are on a hill that is at an angle of θ above horizontal… Ok. Now we know Dr. L. is lazy. This is the third problem he’s reused… Assume they start from rest and that there is no friction between the sled and hill. a.) How fast will the sled be going when it reaches the bottom of the hill. --- Now assume there’s friction between the sled and hill. The coefficient of kinetic friction is µK. b.) Draw a free body diagram of the sled. c.) What is the force of friction acting on the sled? d.) Now use energy and determine the final velocity of the sled with friction. Is it less than it was before? Good! It better be.

A guard rail at the front row of the second deck of a sports stadium is 33 inches high. When someone sits back normally in a seat with a seat back in that section, the angle between the eye and the near edge of the playing field is 35 degrees below horizontal.

a) can an average person see over the rail? (use anthropometric data to make an estimate)

b) suggest how you would design the railing to prevent a front row fan from falling over the edge.

A magnetic field has a magnitude of 1.2e-3 T, and an electric field has a magnitude of 5.1e3 N/C. Both fields point in the same direction. A positive -1.8 microC moves at a speed of 3.5e6 m/s in a direction that is perpendicular to both fields. Determine the magnitude of the net force that acts on the charge.

1. Two 2.0 cm by 2.0 cm metal electrodes are spaced 1.0 mm apart and connected by wires of the terminals of a 9.0 V battery.
a. What are the charge on each electrode and the potential difference between them?
b. If the wires are disconnected, and insulating handles are used to pull the plates apart to a new spacing of 2.0 mm, what are the charge on each electrode and the potential difference between them?

c. If instead, the plates from part a. remained connected to the battery while the insulating handles pull them apart to their new spacing of 2.0 mm, what are the charge on each electrode and the potential difference between them?

A chimney (length 17.6 m, mass 823 kg] cracks at the base and topples. Assume: - the chimney behaves like a thin rod, and does not break apart as it falls. - only gravity (no friction) acts on the chimney as it falls. - the bottom of the chimney pivots, but does not move. Find the linear speed of the center of mass of the chimney, in m/s, just as it hits the ground

Part 2)A chimney (length 11.1 m, mass 852 kg] cracks at the base and topples. Assume: - the chimney behaves like a thin rod, and does not break apart as it falls. - only gravity (no friction) acts on the chimney as it falls. - the bottom of the chimney pivots, but does not move. Find the linear speed of the very top of the chimney, in m/s, just as it hits the ground.