eyelashwishers

Light waves with two different wavelengths, 632 nm and 474 nm, pass simultaneously through a single slit whose width is 9.19 × 10-5 m and strike a screen 1.20 m from the slit. Two diffraction patterns are formed on the screen. What is the distance (in cm) between the common center of the diffraction patterns and the first occurrence of the spot where a dark fringe from one pattern falls on top of a dark fringe from the other pattern?

Light of wavelength 504 nm is incident on a diffraction grating that has 1.67 × 103 lines/cm. What angle θ does the second principal maxima make with respect to the central principal maximum?

A circular coil (890 turns, radius = 0.035 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is perpendicular to the magnetic field. At t = 0.024 s, the normal makes an angle of 45o with the field because the coil has made one-eighth of a revolution. An average emf of magnitude 0.087 V is induced in the coil. Find the magnitude of the magnetic field at the location of the coil.

In the drawing the magnetic field has a magnitude of 1.04 T, the rod has a length of 0.883 m, and the hand keeps the rod moving to the right at a constant speed of 3.23 m/s. If the current in the circuit is 0.0343 A, what is the average power being delivered to the circuit by the hand?

http://imgur.com/L1YPhfG

Two circuits contain an emf produced by a moving metal rod, like that shown in the drawing. The speed of the rod is the same in each circuit, but the bulb in circuit 1 has one-half the resistance of the bulb in circuit 2. The circuits are otherwise identical. The resistance of the light bulb in circuit 1 is 43 Ω, and that in circuit 2 is 86 Ω. Determine (a) the ratio ζ1/ζ2 of the emfs and (b) the ratio I1/I2 of the currents in the circuits. (c) If the speed of the rod in circuit 1 were twice that in circuit 2, what would be the ratio P1/P2 of the powers in the circuits?

http://imgur.com/rIEddx9

A proton with a speed of 2.4 × 106 m/s is shot into a region between two plates that are separated by a distance of 0.27 m. As the drawing shows, a magnetic field exists between the plates, and it is perpendicular to the velocity of the proton. What must be the magnitude of the magnetic field, so the proton just misses colliding with the opposite plate?

Two equipotential surfaces surround a +2.00 x 10-8-C point charge. How far is the 200-V surface from the 87.0-V surface?

Four identical charges (+2.2 μC each) are brought from infinity and fixed to a straight line. Each charge is 0.48 m from the next. Determine the electric potential energy of this group.

The potential difference VB - VA = 49.0 V. What is the magnitude and sign of the charge?

http://imgur.com/gez5aiS

picture^^

VB - VA between these two locations? Be sure to include the proper algebraic sign.

http://imgur.com/LZEt3mW

picture^^

A resistor is connected across the terminals of a 9.0-V battery, which delivers 2.7 x 105 J of energy to the resistor in 5.0 hours. What is the resistance of the resistor?

A light bulb is wired in series with a 118-Ω resistor, and they are connected across a 120.0-V source. The power delivered to the light bulb is 22.6 W. What is the resistance of the light bulb? There are two possible answers. Give the larger of the two

wo gas cylinders are identical. One contains the monatomic gas argon (Ar), and the other contains an equal mass of the monatomic gas krypton (Kr). The pressures in the cylinders are the same, but the temperatures are different. Determine the ratio of the average kinetic energy of a krypton atom to the average kinetic energy of an argon atom.

A cylindrical glass beaker of height 1.264 m rests on a table. The bottom half of the beaker is filled with a gas, and the top half is filled with liquid mercury that is exposed to the atmosphere. The gas and mercury do not mix because they are separated by a frictionless, movable piston of negligible mass and thickness. The initial temperature is 283 K. The temperature is increased until a value is reached when one-half of the mercury has spilled out. Ignore the thermal expansion of the glass and mercury, and find this temperature in kelvins.

A pot of water is boiling under one atmosphere of pressure. Assume that heat enters the pot only through its bottom, which is copper and rests on a heating element. In two minutes, the mass of water boiled away is m = 3.0 kg. The radius of the pot bottom is R = 8.5 cm and the thickness is L = 1.0 mm. What is the temperature of the heating element in contact with the pot?

A person's body is covered with 1.80 m2 of wool clothing. The thickness of the wool is 2.15 × 10-3 m. The temperature at the outside surface of the wool is 6.46 °C, and the skin temperature is 34.4 °C. How much heat per second does the person lose due to conduction?

First of all, I'm never smoking weed again. I took a big hit and I inhaled some pieces of weed (wasn't using a screen.) I spit the pieces out or at least most of them. The back of my throat feels a bit burnt..honestly I'm just wondering if I'll be okay.

I feel incredibly guilty for smoking and I don't want anything to happen to me health wise just because of this one time :/ will this heal? Will there be any long-term effects?

I'm kinnnnd of freaking out at the moment. I've been noticing this for about a month now, but it's never been this bad. I don't know what to do :/ I have a doctors appointment tomorrow at 3pm but is that too late? I don't know what's wrong with me and I'm soooo scared. Plus my left eye is lazy and the back of my head has been hurting :/

I'm 17-bit overweight- WHY THE HELL IS THIS HAPPENING? I'M TOO YOUNG :(

help! what should i do?