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An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.7 m (9 ft) is connected to an electric heater which draws 11.5 A on a 120-V line.
How much power is dissipated in the cord?
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A body moving with uniform acceleration has a velocity of 18.9 cm/s when its x coordinate is 1.88 cm. If its x coordinate 2.68 s later is -5.03 cm, what is the x-component of its acceleration? Answer in units of cm/s2.
Question: A rock climber stands on top of a 60 m high cliff hanger a pool of water. He throws two stones vertically downward 1.0 s apart and observes that they cause a single splash. The initial speed of the first stone ...
Question: A straight wire of length L has a positive charge Q distributed along its length. Find the magnitude of the electric field due to the wire at a point located a distance d from one end of the wire along the line ...
Question: Your roommate is working on his bicycle and has the bike upside down. He spins the 70.0cm -diameter wheel, and you notice that a pebble stuck in the tread goes by three times every second. Part A) What is the p ...
A slab of clay with a mass of 0.26 kg, moving with a speed of 5.24 m/s, hits a stationary toy car of mass 0.54 kg. If the clay hits and sticks to the car, what is the speed of the clay and car (which are now moving fused ...
At a playground, a toddler climbs on his bike starts to pedal away from his dad as fast as he can, at 12.6 km/h, towards a busy road that is 74.2 m away. At Δt=3.44 seconds later, his dad glances up from his phone and no ...
Question: The power rating on a light bulb indicates how much power it would dissipate when it is hooked up to the standard household voltage of 120 V (this rating does not mean that the light bulb always dissipates the ...
Question: Oppositely charged parallel plates are separated by 5.31 mm. A potential difference of 600 V exists between the plates. (a) What is the magnitude of the electric field between the plates? N/C (b) What is the ma ...
Question: A parallel-plate air capacitor has a capacitance of 920 pF. The charge on each plate is 2.55 ?C What is the potential difference between the plates? If the charge is kept constant, what will be the potential di ...
Question: The passengers in a roller coaster car feel 50% heavier than their true weight as the car goes through a dip with a 30.0 m radius of curvature. What is the car's speed at the bottom of the dip? The response mus ...
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