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A metal rod with a diameter of 2.30 cm and length of 1.08 m has one end immersed in ice at 32.0° F and the other end in boiling water at 212° F. If the ice melts at a rate of 1.24 g every 180 s, what is the thermal conductivity of this metal? W/(m · K) Identify the metal. Assume there is no heat lost to the surrounding air. steel iron lead nickel.
A photoelectric-effect experiment finds a stopping potential of 1.93 V when light of 200 nm is used to illuminate the cathode, From what metal is the cathode made
A 115kg mail bag hangs by a vertical rope 3.5m long. Find the force needed to hold the bag in its new position
A puck on a frictionless air hockey table has a mass of 0.500 kg and is attached to a cord passing through a hole in the surface, What is the new angular velocity of the puck
A proton that has a mass m and is moving at 390 m/s in the + direction undergoes a head-on elastic collision with a stationary oxygen nucleus of mass 16m
A propeller is modeled as five identical uniform rods extending radially from its axis. what is its rotational kinetic energy
A proton accelerates from rest in a uniform electric field of 644 N/C. At some later time, its speed is 1.42 106 m/s. How long does it take the proton to reach this speed
A centripetal force of 205 N acts on a 1,350-kg satellite moving with a speed of 4,900 m/s in a circular orbit around a planet. What is the radius of its orbit
The binding energy of a nucleus is 441.3 MeV. What is the mass defect of the nucleus in atomic mass units
The monthly (30 days) electric bill included the cost of running a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten 60 W light bulbs for 5.0 hr/day. How much did these items contribute to the cost of the monthly ..
A 35 ? lamp and a 90 ? lamp are connected in series and placed across a potential of 40 V. What is the voltage drop across the first lamp
The electric field in a region of space is oriented along the positive y axis. A circle of radius R is placed in xz-plane. The flux of the electric field by this circle is Φ. The same electric field passing through a second circle of radius 2R parall..
A 3.0 syringe has an inner diameter of 5.0, a needle inner diameter of 0.28, and the plunger pad diameter (where you place your finger) of 1.20.
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