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Two identical resistors are connected in parallel across a 27-Vbattery, which supplies them with a total power of 6.5 W. While thebattery is still connected, one of the resistors is heated so thatits resistance doubles. The resistance of the other resistorremains unchanged. Find (a) the initial resistanceof each resistor, and (b) the total powerdelivered to the resistors after one resistor has been heated.
A 1200 kg car is pulling a 500 kg triler along level ground. Friction is negligible. What is the magnitude of the force exerted by the car on the trailer
The nucleus of a hydrogen atom is a single proton. The radius of a proton is approximately 1 fm. What fraction of a hydrogen atom is occupied by the nucleus
Nate the Skate was an avid physics student whose main non-physics interest in life was high-speed skateboarding. In particular, Nate would often don a protective suit of Bounce-Tex, which he invented, and after working up a high speed on his skate..
A waterpipe of radius 0.02 m delivers water at a flow rate of 0.01m^3/ s^1 at 20 degrees C. What is the average velocity of the water
A wooden block floating in seawater has half of its volume submerged. When the block is placed in mineral oil, 93% of its volume is submerged.
Two friends are playing a version of proton golf where the hole ismarked by a single proton. The first friend reads his meter, anddeclares he has a field strength of 25.5 N/C. Thesecond friend looks at her meter and realizes she is three times asfar ..
a meter stick is shot horizontally, from a meter stick projector at a speed of .9c. How large will it be relative to its frame of reference
A 3.4 x 105 kg airplane is flying horizontally at a height of 6.0 km with constant velocity. What is the amount of lifting force created by the plane's wings
Superman attempts to drink water through a very longstraw. With his great strenth he achieves maximum possible suction.The walls of the tubular straw don't collapse. Find the Maxium height through which he can lift the water
The helium atom has a volume of about 3x10^(-30) m^3. What fraction of a volume of helium gas at STP is actually occupied by molecules
A car is traveling at 50 miles per hours. The driver sees a deer and hits the brakes. How far will it go
Remember that the distance relationship is s = s0 + v0 t = 1/2 a t^2 An object falls freely from rest on a planet where the acceleration due to gravity is 20 m/s/s.
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