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a. Doubling both charges changes the potential energy for a pair of a pint charges by a factor of?
b. Tripling the separation between charges changes the potential energy of a pair of a point charges by a factor of?
How many coulombs of positive charge are there in 4.20 kg of plutonium, given its atomic mass is 244 and that each plutonium atom has 94 protons
A device consisting of four heavy balls connected by low mass rods is free to rotate about an axle. It is initially not spinning. what is the angular speed of the device
An initially motionless test car is accelerated uniformly to 145 km/h in 8.28 seconds before striking a simulated deer. The car is in contact with the faux fawn for 0.455 seconds, after which the car is measured to be traveling at 60.0 km/h.
A 12.0 resistor is made from a coil of copper wire whose total mass is 20.0. What is the diameter of the wire and How long is it
The heater element of a toaster is 5.40m length of nichrome wire, whos diameter is 0.480mm. What is the power drawn by the toaster
A) Assuming that the Styrofoam absorbs a negligibly small amount of heat and that no heat was lost to the surroundings, what is the specific heat of the metal? B) Which is more useful for storing heat, this metal or an equal weight of water? defin..
A helium nucleus (charge +2e) moves through a potential difference V = ?0.40 kV. Its initial kinetic energy is 3.40 10-16 J. What is its final kinetic energy
A 4.94-g bullet is shot through a 0.99-kg wood blocksuspended on a string 2.00 m long. The center of mass of the blockrises a distance of 0.50 cm. Find the speed of the bullet as ite merges from the block if its initial speed is 393 m/s.
Discuss the cause and different mechanisms available. Recognize and discuss the flow control techniques on which they are based? Determine the pros and cons of each?
A wire has a length of 6.80 10-2 m and is used to make a circular coil of one turn. evaluate the maximum torque that this coil can experience
A 67-g ice cube at 0°C is placed in 732 g of water at 22°C. What is the final temperature of the mixture
A standard 100 W (120 V) lightbulb contains a 9.40 cm-long tungsten filament. The high-temperature resistivity of tungsten is 9.0*10^-7Om. What is the diameter of the filament?
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