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A metal wire has a resistance of 10.00? at a temperature of 20.0°C. If the same wire has a resistance of 10.55? at 90.0°C, what is the resistance of this same wire when its temperature is 220°C?
The two upper front teeth of a person exert a total force of 30N on a piece of steak. If the biting edge of each tooth measures 10 mm x 1 mm, find out the pressure on the steak.
Use the table shown below to determine the energy in eV of the photon emitted when an electron jumps down
A motor run by a 7.6V battery has a 15 turn square coil with sides of length 3.0cm and total resistance 25ohms. What is the maximum torque on the motor
A balloon carrying a basket is descending at a constant velocity of 20.0m/s. At the instant the rock hits the ground, how far is it from the basket
A converging lens of focal length 0.187 m forms a virtual image of an object. What is the distance between the object and the lens
A falling stone takes 0.33s to travel past a window 2.20 m tall on the right. From what height above the top of the window did stone fall.
A bullet of mass 0.0022 kg initially moving at 496 m/s embeds itself in a large fixed piece of wood and travels 0.64 m before coming to rest. Imagine that an acceleration of the bullet is constant.
4. How much angioplasty is enough??Angioplasty is a technique in which arteries partially blocked with plaque are dilated to increase blood flow. By what factor must the radius of an artery be increased in order to increase blood flow by a fact..
What is the total charge of the uranium nucleus? (The neutral uranium atom has 92 electrons.), What is the magnitude of its electric field at a distance of 1.48×10-10 m from the nucleus
A girl and her bicycle have a total mass of 40 kg. At the top of the hill her speed is 5.0 m/s. what is her speed at the bottom
A nuclear power plant generates waste thermal energy at a rate of 1000 MW = 1000 × 106 W. Assume the heat of vaporization of a water is 2.256× 106 J/kg. How much water must evaporate to cool the plant per day
q1. a 9.7 v battery is connected to a bulb whose resistance is 1.3. how many electrons leave the battery per minute?q2.
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