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You observe that a solid cube of some material floats on the surface of an oil puddle at a service station with 76.3% of its volume submerged. The density of the oil is 935kg/m^3. What is the density of the cube's material?
An engine has a maximum theoretical efficiency of 45%. If the temperature difference between the input, what is the exhaust temperature
When an electric heater is turned on, the Nichrome heating element is at 0° C and draws a current of 15 A, with a potential difference of 120 V between the ends of the element. The element heats up to 797° C, with the potential difference constant..
The wavelength of visible light ranges from 400 {\rm nm} to 700 {\rm nm}. Find the ranges of this light's angular frequency
What is speed of the second train, which travels faster
For t
Derive the speed of the wave water in a shallow pool of water of depth y. You may consider using a method similar to the derivation of the sound wave equation
A car with a mass of 1300 kg decreases its forward speed from 22 m/s to 14 m/s in 4.0 seconds. What are the magnitude and direction of the net force on the car
The total kinetic energy in one mole of nitrogen is 4,000 J. what is the root mean-square velocity of an individual particle in the ideal gas
Two cars collide at an intersection. Car A, with a mass of 2000 kg , is going from west to east, while car B, of mass 1400 kg , is going from north to south at 17.0m/s. As a result of this collision, the two cars become enmeshed and move as one af..
A microscope uses an eyepiece with a focal length of 1.43 cm. What is the magnification of the microscope
It has been suggested that rotating cylinders about 12 mi long and 5.1 mi in diameter be placed in space and used as colonies. What angular speed should such a cylinder have so that the centripetal acceleration at its surface equals free-fall acce..
A piece of copper at 320 degrees Celsius is dropped into 1.4 kg of water at 17 degrees Celsius. If the equilibrium temperature is degrees Celsius , what is the mass of the copper
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