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(a) A 35.1-m length of copper wire at 20.0°C has a radius of 0.23 mm. If a potential difference of 7.0 V is applied across the length of the wire, determine the current in the wire. (Use the values in this table.)
A
(b) If the wire is heated to 38.0°C while the 7.0-V potential difference is maintained, what is the resulting current in the wire?
One possible means of achieving space flight is to place a perfectly reflecting aluminized sheet into Earth 's orbit and to use the light from the Sun to push this solar sail, What force is exerted on the sail
A 4 kg wooden block is at rest on a tabletop. A 0.03 kg bullet enters the block going at 800 m/s. How much time was the bullet in the block
Water falls without splashing at the rate of 0.210 L/s from a height of 3.90m into a 0.590 kg bucket on a scale. If the bucket is originally empty, what does the scale read 4.00 s after water starts to accumulate in it.
One solenoid is centered inside another. The outer one has a length of 50.0cm and contains 6800 coils, Find the emf induced in the inner solenoid
At the instant the traffic light turns green, a car that has been waiting at an intersection starts forward with a constant acceleration of 2.45 m/s2. How fast is the car traveling when it overtakes the truck
What is the speed of the bullet.
A 60.0-kg runner expends 325 W of power while running a marathon. determine the volume of bodily fluid (assume it is water) lost per hour
A solution has a hydronium-ion concentration of 1.0 x 10-5 mol per liter. What is the hydroxide-ion concentration of this solution
Zach, whose mass is 55kg , is in an elevator descending at 14m/s. What is Zach's apparent weight while the elevator is braking
A nearsighted patient's far point is 0.521 m from her eyes. What is the distance between her eyes and the glasses
A cannon tilted up at a 28? angle fires a cannon ball at 70m/s from atop a 22m -high fortress wall. What is the ball's impact speed on the ground below
A parachutist descending at the speed of 25 m/s loses a shoe at an altitude of 50 m. (Assume the positive direction is upward.)
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