What is the difference between a photo-interrupter and an opto-isolator?

A 193 Ω resistor, a 0.750 H inductor, and a 6.00 μF capacitor are connected in series across a voltage source that has voltage amplitude 28.5 V and an angular frequency of 245 rad/s . What is vR at t= 18.0 ms ? What is vL at t= 18.0 ms ? What is vC at t= 18.0 ms ?

In a rainy Summer day you observe a beautiful rainbow. Complete the following statements with greater than, less than, or equal to.

1. The wavelength of the light inside a raindrop is ... the wavelength of the same light in air.

2. The speed of the light inside a raindrop is ... the speed of light in air.

3. The frequency of the light inside a raindrop is ... the frequency of the same light in air.

In the ground state of the Hydrogen atom the energy of the electron is E₀ = -13.61 eV. What is the energy of the electron in the ground state of the He⁺ ion?

What is the energy of the electron in the ground state of the Li⁺⁺ ion?

The electron in the He⁺ ion is excited to the n = 2 principal state. What is the energy of the electron now?

What is the energy of the electron in the Li⁺⁺ ion in the n = 2 principal state?

What is the energy of the electron in the Li⁺⁺ ion in the n = 3 principal state?

Take element Z = 47 from the periodic table. Ionize it 46 times so that there is only one electron left orbiting around the nucleus. What is the ground state energy of the electron?

What is the energy of the electron when it is in the n = 8 principal state in the ion above?

Example 1:  H2O boils at 100ºC and 1 atm.  At what temperature will water boil

if pressure = 500 torr (1 atm / 760 torr) = 0.658 atm?

DvapH = 40.66 kJ mol-1.

Can you please show all steps and equations??? Thank you

A bee is flying down South with a velocity of 10 m/s, the wind is blowing toward the bee at a constant velocity of 3 m/s in the direction of the North-West. How far does the bee travel after 10 sec and at what direction? At what velocity should the bee fly in order to keep itself moving straight toward the South at 5 m/s?

Three particles are fixed on an x axis. Particle 1 of charge q₁ is at x = -a and particle 2 of charge q₂ is at x = +a. If their net electrostatic force on particle 3 of charge Q is to be zero, what must be the ratio q₁/q₂ when particle 3 is at (a) x = +0.754a and (b) x = +1.65a?

What is a good application of an RC circuit? Explain how the RC circuit carries out its function in the application.

A fox fleeing from a hunter encounters a 0.675 m tall fence and attempts to jump it. The fox jumps with an initial velocity of 7.50 m/s at an angle of 45.0°, beginning the jump 1.94 m from the fence. By how much does the fox clear the fence? Treat the fox as a particle.

Particle A and particle B are held together with a compressed spring between them. When they are released, the spring pushes them apart and they then fly off in opposite directions, free of the spring. The mass of A is 5.00 times the mass of B, and the energy stored in the spring was 30 J. Assume that the spring has negligible mass and that all its stored energy is transferred to the particles. Once that transfer is complete, what are the kinetic energies of (a) particle A and (b) particle B?

A 28.5 kg block is being pulled by a force F = 245 N up along a rough incline. The coefficient of kinetic friction between the block and the incline is μk = 0.30. The block is pulled through a distace of 21.0 m. Angle is 33 degrees.

(a) Solve for the magnitude of the normal force FN (in Newtons)? Calculate the work (in Joules) done by the normal force. Pay attention to the angle in the work formula and the sign of work.

(b) What is the magnitude of the kinetic frictional force (in Newtons)? Calculate the work (in Joules) done by the kinetic frictional force. Pay attention to the angle in the work formula and the sign of work.

(c) Calculate the work (in Joules) done by the pulling force F. Pay attention to the angle in the work formula and the sign of work.

(d) The block starts from rest at the bottom of the incline. After it is pulled through a distance of 21.0 m up along the incline, what is its vertical height (in meters), hf? What is its speed (in m/s) after being pulled through 21.0 m?

(e) Add up the works (in Joules) done by all NONCONSERVATIVE Forces:

(e)

using maxwell eqs show that you can get snells law

A powerful 0.54-W laser emitting 670-nm photons shines on a black sail of a tiny 0.10-g cart that can coast on a frictionless track.

Part A

Determine the force of the light on the sail. Assume that the light is totally absorbed by the sail.

Express your answer to two significant figures and include the appropriate units.

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Part B

What time interval is needed for the cart's speed to increase from zero to 2.0 m/s?

Express your answer using two significant figures.

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Compact fluorescent bulbs are much more efficient at producing light than are ordinary incandescent bulbs. They initially cost much more, but last far longer and use much less electricity. According to one study of these bulbs, a compact bulb that produces as much light as a 100 Wincandescent bulb uses only 23.0 W of power. The compact bulb lasts 1.00×10⁴ hours, on the average, and costs $ 12.0 , whereas the incandescent bulb costs only 76.0 ¢, but lasts just 750 hours. The study assumed that electricity cost 9.00 ¢ per kWh and that the bulbs were on for 4.0 h per day.

(A) What is the total cost (including the price of the bulbs) to run incandescent bulbs for 3.0 years?

(B) What is the total cost (including the price of the bulbs) to run compact fluorescent bulbs for 3.0 years?

(C) How much do you save over 3.0 years if you use a compact fluorescent bulb instead of an incandescent bulb?

(D) What is the resistance of a "100 W" fluorescent bulb? (Remember, it actually uses only 23 W of power and operates across 120 V.)

1. Mathematically explain in Detail how Newton's cradles work. Be able to use your understanding of how Newton's cradles work to create a physics equation/formula that can be used in any situation.