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A person stands on a bathroom scale in a motionless elevator. Whenthe elevator begins to move, the scale briefly reads only0.64 of the person's regular weight. Calculate the acceleration of the elevator, and find the direction of acceleration.
m/s2
A scintillator absorbs an incident flux of 5 MeV alpha particles that totals 10^6 particles/s, estimate the expected signal from the photodiode
A device draws 6.000 kW of power when connected to the 12.0-V output of a step down transformer. Calculate the output voltage of the generator
a cylindrical steam boiler shell is of riveted construction. it is made from plates 18mm thick and has a diameter of
A 9300 kg boxcar traveling at 20m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 10 m/s. What is the mass of the second car.
A 82 kg explorer lands on Planet A, where the gravitational acceleration is 10.5 m/s^2. The radius of the planet is 7.91 x 10^7 m. What is the weight on this planet in Newtons? Express the answer to three significant digits.
Batman throws a bat grenade at an angle of 44 degrees to the horizontal with a speed of 17.80 meters per second. How far does it travel.
A standard 100 W (120 V) lightbulb contains a 7.70cm-long tungsten filament. What is the diameter of the filament
To keep a door closed, a wooden stick is wedged between the floor and the doorknob. The stick exerts at B a 45-lb force directed along line AB. Swap that force with an equivalent force-couple system at C.
In a friction experiment, your wooden plank is horizontal. When a mass of 100 grams is hanging on the weight hanger of mass 50 grams, what is the coefficient of kinetic friction
A cosmic ray electron moves at 7.85 multiplied by 106 m/s perpendicular to the earth's magnetic field at an altitude where field strength is 1.10 multiplied by 10-5 T
All distant galaxies are moving away from us. Describe why this does not imply that we are at the center of universe.
A spring-block system executes simple harmonic motion. The mass of the block is m = 12 kg and the total energy is E = 18 J. The amplitude is A = 0:10 m. Find the maximum speed and the maximum acceleration
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