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What is the resistivity (p) of a resistor? What characteristics of a resistor affect the resistivity? Write a formula for this relationship, label each variable and indicate the units used to measure each. Would resistivity be constant for a specific resistor?
An engineer wishes to determine the specific heat of a new metal alloy. A 0.150-kg sample of the alloy is heated to 540°C. Calculate the specific heat of the alloy
A pulsed ruby laser emits light at 694.3 nanometer .Consider an 11.7 ps pulse containing 7.38 J of energy. Calculate the number of photons in it
The electric field points due east and has a magnitude of 4.3 105 N/C. The mass of the electron is 9.11 10-31 kg and that of the proton is 1.67 10-27 kg. Both the proton and electron have charge magnitudes of 1.60 10-19 C.
The block fully compresses the spring, comes to rest briefly, and then moves in the opposite direction with a velocity of - vi. Examine the situation shown in part (a) of the diagram.
A person pushes a 16.0kg lawn mower at constant speed with a force of 89.0N directed along the handle, Calculate the horizontal friction force on the mower
Explain why the VOLTS/DIV knob of an oscilloscope doesn't have to be calibrated and the TIME/DIV button must be calibrated when measuring time-constants
An arrow is shot vertically upward and then 2.06 s later passes the top of a tree 41.3 m high. How much longer will the arrow travel upward
A crate that weighs 20 Newton starts from rest and slides down a rough 5.0 meter long ramp, inclined at 25o with the horizontal. Evaluate the speed of the crate at the bottom of the ramp
answer true or false.a. the electric field and equipotential surfaces are perpendicularb. the force acting on a
A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. How fast will the shell be traveling when it hits the ground
The plates of a parallel-plate capacitor have a separation of 2.00mm , and each has an area of 14.2cm^2 . Each plate carries a charge of magnitude 5.70×10?8C . The plates are in vacuum.
A rod 50 centimeter long and 1.0 centimeter in radius carries a 7.4 mC charge distributed uniformly over its length. Find the approximate magnitude of the electric field 32 meter from the rod
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