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A prospector finds a solid rock composed of granite (density = 2650 kg/m3) and gold (see table 15.1). The volume of the rock is 3.55 x 10-4 m3, and its mass is 3.81 kg. What mass of gold is contained in the rock? What percentage of the rock is gold, by volume? (Hint: find Vgold/Vrock and express it as a percentage.)
A certain red giant star has a luminosity of 100,000 times that of the Sun and is located 600 light-years from Earth. calculate the rate of interstellar extinction in the direction of the star
A singly charged ion (charge q = +1.60e-19 C) completes four revolutions in a uniform magnetic field, Calculate the mass of the ion in kilograms
A 2.00×10-2- cube of ice at an initial temperature of -19 is placed in 0.670 of water at 44.0 in an insulated container of negligible mass.
An electron is accelerated through an electric potential of 255 V, Find the radius in cm of the subsequent circular path for this electron
You're driving down the highway late one night at 20 m/s while a deer steps onto the road 44m in front of you. Your reaction time before stepping on the brakes is 0.50 s, and the maximum deceleration of your car is 11m/s^2 .How much distance is be..
A car is driving directly north on the freeway at a speed of 117 km/h and a truck is leaving the freeway driving 76 km/h in a direction that is 40° west of north. What is the velocity of the truck relative to the car?
When subject to a steady acceleration of 0.800 g, the object must be located 0.600cm from its equilibrium position. Find the force constant required for the spring.
A singly charged ion of unknown mass moves in a circle of radius 14cm in a magnetic field of 8.2 T. The ion was accelerated through a potential difference of 9kV before it entered the magnetic field.What is the mass of the ion.
If you drop an aspirin and it takes 0.18 sec to hit the table, how high above the table was the aspirin when it released?
The rms speed of a sample gas is increased by 2 %, What is the percent change in the temperature of the gas
You have a lens whose focal length is 12.7 cm. You place an object on the axis of the lens at a distance of 6.25 cm from it. How far is the object\'s image from the lens
An explosive charge imparts a velocity of 10,350 feet per second to a mortar as it exits the muzzle of mortar. If the mortar is elevated at 80 degrees what are the horizontal and vertical velocities on the mortar shell.
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