Two charges are placed along a line, with q1 to the left of q2. Somewhere along this line, to the left of charge 1, the electric field is zero. Based on this information, determine whether each of the following conditions is possible. a. Yes or No |q1| < |q2|
b. Yes or No q1 = q2
c. Yes or No q1 = ?q2
d. Yes or No The charges have the same sign.
e. Yes or No The charges have opposite signs.

Athin, square metal plate measures 14 cm on each side and has emissivity of 0.60. the plate is heated to a temperature of 745°c. what is the rate at which the plate radiates energy ? the stefan-boltzmann constant is 5.67 × 10-8 w/(m2 ? k4). remember that the plate will radiate energy from both its top and bottom surfaces.

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

In a good thermo flask the main cause of heat loss is