magnetic3

3. The force on an electron moving at right angles through a magnetic field is a. out fo the palm according to the right hand rule b. out of the back of the hand according to the right hand rule c. along the direction of the fingers according to the right hand rule d. along the direction of the thumb according to the right ...continues

Magnetic Poles & Resistors

13. Resistors in series have a total resistance a. greater than any individual resistor b. smaller that any one individual resistor c. smaller than if they were all wired parallel to each other d. none of these 14. ____ magnetic poles attract, and _____ magnetic poles repel. a. like, opposite b. opposite, opposite ...continues

Specific heat capacity

Question: A piece of glass has a temperature of 85.4C. Liquid that has a temperature of 43.0C is poured over the glass, completely covering it, and the temperature at equilibrium is 51.4C. The mass of the glass and the liquid is the same. Ignoring the container that holds the glass and liquid and assuming that the heat lost to ...continues

Heat and Phase Change: Latent Heat

Sorry to give you such a short deadline but I'm desperate. I've been working (staring) at this problem forever. I really don't know where to start. Question: Assume that the pressure is one atmosphere and determine the heat required to produce 2.40kg of water vapor at 100.0C, starting with the following conditions. A)2. ...continues

Conduction

Question: In an electrically heated home, the temperature of the ground in contact with a concrete basement wall is 12.0C. The temperature at the inside surface of the wall is 22.0C. The wall is 0.10m thick and has an area of 10.0m^2. Assume the one kilowatt*hour of electrical energy costs $0.10. How many hours are require ...continues

Molecular Mass, the Mole, and Avagadro's Number

Question: The artificial sweetener NutraSweet is a chemical called aspartame (C14 H18 N2 O5). A) What is its molecular mass (in atomic units)? B)What is the mass (in kg) of an aspartame molecule? What i have tried so far: C=12.011 H=1.00794 N=14.0067 O=15.9994 Molecular Mass=14(12.011)+18(1.00794)+2(14.0067)+5(15.9 ...continues

The Ideal Gas Law

Question: At the start of a trip, a driver adjusts the absolute pressure in her tires to be 2.82*10^5 Pa when the outdoor temperature is 286 K. At the end of the trip she measures the pressure to be 2.98*10^5 Pa. Ignoring the expansion of the tires, find the air temperature inside the tires at the end of the trip. This is w ...continues

Find wave speed along vibrating string

A cello string .75m long has a 220-Hz fundamental frequency. Find the wave speed along the vibrating string. How can you produce a low- pitch by altering the length of the string, the thickness, and tension?

How to find the angle of incidence.

A person stands .038 cm in front of a wall that is covered floor to ceiling with a plane mirror. His eyes are .019 cm above the floor. He holds a flashlight between hi feet and manages to point it at the mirror. At what angle of incidence must the light strike the mirror so the light reaches his eyes?

Temperature and Kinetic Theory

Show that for a mixture of two gases at the same temperature, the ratio of the rms speeds of their molecules is equal to the inverse ratio of the square roots of their molecular masses.