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 hand rule 4. According the right hand rule of current along a straight wire, a. your fingers curl around the wire in the direction of the magnetic field b. your thumb points in the direction of the magnetic field c. your fingers curl around the wire in the direction of the current d. none of these. 5 A wire has current running through it from east to west.... click for more

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 c. like, like d. opposite, like 15. A magnetic field is represented by a group of exes on the page, with an arrow to the right representing the velocity of a proton. How would the force exerted by the magnetic field be shows? a. an arrow pointing to the bottom of the page b. an arrow pointing to the top of the page c. a bunch of dots on the page d. an arrow ... click for more

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 or gained from the surroundings is negligible, determine the specific heat capacity of the liquid. I know that the equation needed is: Q=cm(delta T) where Q=the heat that must be supplied or removed to change the temperature of a substance and c=specific heat capacity and m=mass of substance and delta T= the change in temperature I also ... click for more

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)2.40kg of water at 91.0C B)2.40kg of liquid water at 4.0C Please help me!!

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 required for one dollar's worth of energy to be conducted through the wall? This is what I have tried so far: Q= (k*A*delta T)t/L where, Q=the heat conducted t=time L=length of bar A=cross-sectional area delta T=temperature difference between the ends of the bar k=the thermal conductivity of the material Q= (1.1*10*10)3600/0.1 Q= 3.96 * 10^6 J or Watts ... click for more