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A bicycle with 0.8-m-diameter tires is coasting on a level road at 5.6m/s. A small blue dot has been painted on the tread of the rear tire. What is the speed of the blue dot when it is 0.4 m above the road?
An ion accelerated through a potential dif- ference of 177 V experiences an increase in kinetic energy of 6.03 × 10?17 J . Find the magnitude of the charge on the ion.
What is the efficiency of a cyclical heat engine in which 65.0 kJ of heat transfer occurs to the environment for every 95.0 kJ of heat transfer into the engine
A cube of ice is taken from the freezer at -8.7°C and placed in a 97 g aluminium calorimeter filled with 351 g of water at the room temperature of 20°C. The final situation is observed to be all water at 19°C. What was the mass of an ice cube.
A physics lecture room has a volume of 254 m3. For a gas pressure of 1.00 atm and a temperature of 27.0 oC, use the ideal gas law to estimate the number of air molecules in the room
A cube of ice is taken from the freezer at -8.50C and placed in a 95-g aluminum calorimeter filled with 310 g of water at room temperature of 200C. Find the mass of the ice cube
A hot air balloon decends toward the ground with a velocity of (1.6 m/s). A champagne bottle is opened to celebrate takeoff, expelling the cork horizontally with a velocity of (4.0 m/s) relative to the balloon.
A spring with a spring constant k of 18 N/m is stretched a distance of 12 cm (0.12 m) from its original unstretched position. What is the increase in potential energy of the spring?
The molecular mass of helium is 4 g/mol, the Boltzmann's constant is 1.38066 × 10?23 J/K, the universal gas constant is 8.31451 J/K · mol, What is the average kinetic energy of each helium atom
Monochromatic light of a given wavelength is incident on a metal surface. However, no photoelectrons are emitted. how should the incident light be adjusted
Calculate the de Broglie wavelength of a 4.6 MeV alpha particle emitted from an atomic nucleus whose diameter is approximately 1.6 x 10-14 m. Calculate its minimum kinetic energy according to the uncertainty principle.
The dial on an FM radio contains numbers ranging from about 88 to about 108. What is the corresponding range of wavelengths
q1. the breaking stress for a wire of radius r of given material is f nms square. afterwards find the breaking stress
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