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You, Archimedes, suspect that the king?s crown is not solid gold but is instead gold-plated lead. To test your theory, you weigh the crown, and find it to weigh 60.0 N, and to have an apparent weight of 55.8 N when it is completely submerged in water. Take the density of gold to be 19300 kg/m^3, the density of lead to be 11340 kg/m^3, and the density of water to be 1000 kg/m^3. Also, use g = 9.8 m/s^2.
What percentage (by weight) of this crown is made of gold? The rest, we assume, is lead.
A water heater consisting of a metal coil that is connected across the terminals of a 24-V power supply is able to heat 195 mL of water from room temperature (20°C) to boiling point in 75 s. What is the resistance of the coil? (When entering units, u..
A pipe is horizontal and carries oil that has a viscosity of 0.15 Pa · s. The volume flow rate of the oil is 5.8 10-5 m3/s. What is the absolute pressure at the input end
a 250 kg merry-go-round is a solid disc with a radius of 1m when a 40 kg child sits at the center the angular speed is 6 rev/s
Describe the role of electrical forces in nuclear fission. When a nucleus undergoes fission, what role can the ejected neutrons play
The radius of a park merry-go-round is 2.4 m. To start it rotating, you wrap a rope around it and pull with a force of 260 N for 11 s. What is the moment of inertia of the merry-go-round
A 1089-kg car and a 2210-kg pickup truck approach a curve on the expressway that has a radius of 229 m. find the normal force on the car to the highway surface
A 1.00 cm object is 60.0 cm in front of a diverging lens that has a -30.0 cm focal length. Find the image position and height. Is the image real or virtual? Is the image upright or inverted
In experiment PH04a, for the resistors in parallel circuit configuration, if we added to the circuit two additional parallel legs with each leg having a single 50 Ohm resistor
Jimmy has caught two fish in Yellow Creek. He has tied the line holding the 3.0 kg steelhead trout to the tail of the 1.5 kg carp. To show the fish to a friend, he lifts upward on the carp with a force of 60 N. Draw a free-body diagram for the carp. ..
A woman hangs by her feet from "gravity boots" that support her weight from above. What is the average blood pressure in a major artery in her ankle
q1. a coiled telephone cord forms a spiral with 56 turns a diameter of 1.30 cm and an unstretched length of 60.0 cm.
A parallel plate capacitor has circular plates of diameter 12 cm. The plates are separated by 3 cm, what is the value of the electric field between the plates
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