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A copper wire has a resistance of 0.570 Ω at 20.0°C, and an iron wire has a resistance of 0.607 Ω at the same temperature. At what temperature are their resistances equal? The temperature coefficient of resistivity for copper is 3.90 10-3(°C)-1 and for iron it is 5.00 10-3(°C)-1.
A proton moves from a position where the electric potential is +2.00 V to a position where the electric potential is +0.50 V. How much work is done by the field on this proton during this change in position?
You launch a model rocket from ground level. It moves directly upward with a constant acceleration of 77.5 m/s2 for 1.10 seconds, at which point it runs out of fuel. Assuming air resistance on the rocket is negligible, what is the maximum altitude..
Swift is a spacecraft that has a collecting area of 0.520 m2 to detect gamma-ray bursts (GRBs). find the amplitude of the magnetic field of the source
question1the pilot of the aircraft wishes to fly due west in a 48.5 kmh wind blowing toward the south. the speed of an
An 9.5 g ice cube at -10°C is put intoa Thermos flask containing 200cm3 of water at 20°C. Byhow much has the entropy of the cube-water system changed whenequilibrium is reached? The specific heat of ice is 2220J/kg·K.
A cannon is launched at an angle of 45.00 and the cannon ball lands 301 m away. What was the velocity of the cannon ball
an alpha particle m 6.68times10-27 kg q 3.20times10-19 c circularly orbits a charged sphere at a radius of 5.00 cm
A 1.2-cm-tall object is 15cm in front of a concave mirror that has a 66cm focal length. Compute the position of the image. Compute the height of the image.
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 18 m/s at an angle 38 degrees; by respect to the horizontal. Sarah catches the ball 1.5 meters above the ground. Wha..
Two sound waves have intensities of 0.100Wm^2 and 5.00W/^2. What is the difference in their intensity levels
As the swimmer approached the Ontario shore, she encountered a cross current of 2 m/s [E 25 S]. Compute her velocity with respect to the crowd observing from the beach (with respect to the ground)
A cylinder rolls down a ramp of height h = 1.1 m with ? = 36°, starting from rest at the top. How long does it take to reach the bottom of the ramp
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