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A 8.0 ohm and a 4.0ohm resistor are connected in parallel to a 12Vbattery. (a) What is the current in in the circuit? (b) What is the voltage drop across each resistor? (c) What is the power dissipated by each resistor?
If 200 g of water is contained in a 300g aluminum calorimeter at 20°C and 20g of steam at 100°C is introduced into the calorimeter
One cubic meter (1.00 m3) of aluminum has a mass of 2.70 103 kg, and the same volume of iron has a mass of 7.86 103 kg. Find the radius of a solid aluminum sphere
What is the initial relative velocity of the two objects? What percentage of the original kinetic energy is convertible to some other form?
you are given the job of evaluating potential power line systems. one system is designed to operate at v 3500 v and
A current travels northwards along a power line, in the downwards magnetic field of the earth. In which direction will the magnetic force on the wire be directed
A bungee cord can stretch, but it is never compressed. When the distance between the two ends of the cord is less than its unscratched length L0, the cord folds and its tension is zero. Find the tension of the bungee cord when the ball is at its lo..
An airplane's takeoff speed is 320 km/h. If its average acceleration is 2.90 m/s^2, how long is it on runway after starting its takeoff roll.
A polar explorer pulls a sled on dry snow (the coefficient of kinetic friction is 0.12 for sled on snow). The rope attached to the sled pulls at an angle of 9° above the horizontal and the explorer pulls with with 600 N of force. The sled has a to..
A 1.50-kg iron horseshoe initially at 670°C is dropped into a bucket containing 22.0 kg of water at 26.0°C. What is the final temperature of the water–horseshoe system? Ignore the heat capacity of the container and assume a negligible amount of water..
A heat transfer of 8.5x10^5 J is required toconvert a block of ice at -11 *C to water at 11 *C. What was the mass of the block of ice
What is the speed of the hydrogen molecule? If it collides with an argon atom, what is the closest their centers can be, considering each as spherical?
A 8.02 -m ladder with a mass of 21.2 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 260 N. At the instant the top of the ladder leaves the ground, the ladder experiences an angular a..
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