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Two cylindrical bars, each with diameter of 2.50 cm, are welded together end-to-end. One of the original bars is copper and is 0.360 m long. The other bar is gold and is 0.125 m long. What is the resistance between the ends of the welded bar at 20 oC?
Find the rms speed and the average kinetic energy of a hydrogen atom at a temperature of 3.4x107 K. (At this temperature (3.4 x10^7)
A car initially travelling at 25.90 m/s undergoes a constant negative acceleration of magnitude 1.60 m/s2 after it brakes are applied. How many revolutions does each tire make before the car comes to a stop, assume the car does not skid and the ti..
Illustrate what angular speed must such a cylinder have so that the centripital acceleration at its surface equals the free-fall acceleration on Earth?
What is the kinetic energy of a 1,500 kg car with velocity of 72.0 km/hr? How much work must be done on the car to bring it to a complete stop.
A converging lens of focal length 7.550cm is 20.5cm to the left of a diverging lens of focal length -6.50cm, Find the magnification of the coins final image
A 1.6 mL syringe has an inner diameter of 5.8 mm, a needle inner diameter of 0.25 mm, and a plunger pad diameter (where you place your finger) of 1.0 cm. A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100.
A subway train is traveling at 83 km/h when it approaches a slower train 46m ahead traveling in the similar direction at 23 km/h.If the faster train begins decelerating at 2.1 meter per second square while the slower train continues at constant s..
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +3q. Sphere B carries a charge of -q. Sphere C carries no net charge.
Explain an experimental method for determining the center of mass of any object, including irregularly shaped objects.
Positive point charges q and 2q are located at x = 0 and x = 3d, respectively. What is the electric field at x = d (point P)? (Use any variable or symbol stated above along with the following as necessary: k for Coulomb constant.) magnitude E = di..
Besides the gravitational force, a 3.40-kg object is subjected to one other constant force. The object starts from rest and in 1.20 s experiences a displacement of (5.50 - 3.30) m, where the direction of is the upward vertical direction. find the ..
compare with the force of gravitational attraction between them.Find the position of the particle after this time.
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