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A small block of mass m slides along a frictionless loop-the-loop track.
If it starts from rest at point P. What is the resultant force at point Q.
At what height above the bottom of the loop should the block be released so that the block completes the loop?
At takeoff, a commercial jet has a speed of 60.0 m/s. Its tires have a diameter of 0.850 m. At how many rpm are the tires rotating
The coefficient of volume expansion of coffee is the same as that of water. How much coffee (in cubic meters) has spilled out of the beaker.
You would like to store 8.6J of energy in the magnetic field of a solenoid. What is the magnitude of the magnetic field inside the solenoid
An electron with the initial speed of 4.00×10^5 is brought to rest by an electric field. What was the initial kinetic energy of electron, in electron volts.
Three stars, each with the mass and radius of our sun, form the equilateral triangle 5.0×109 {rm m} on a side. If all three are simultaneously released from rest, what are their speeds as they crash together in the center.
A child complains that her milk is too hot. It is indeed too hot at 90o C. what is the temperature of the mixture
A heat engine does 798.57 J of work per cycle while exhausting 163.83 J of waste heat. What is the engine's thermal efficiency in percent
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.139 N when their center-to-center separation is 69.5 cm.
A scuba diver and her gear displace a volume of 69.7L and have a total mass of 72.9kg. What is the buoyant force on the diver in sea water
The stirrer is used to stir the mixture until it reaches its last equilibrium temperature of 32°C. Analyse the mass of the aluminum cup.
Colonel John P. Stapp, USAF, participated in studying whether a jet pilot could survive emergency ejection. Determine the negative acceleration he experienced
A beam of 6 MeV alpha particles scatters from a thin gold foil. What is the ratio of the number of alpha particles scattered to angles greater than 1° to the number scattered to angles greater than 3°
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