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Three liters (3000 cm3) of oil is spilled onto a smooth lake. If the oil spreads out uniformly until it makes a circular oil slick just one molecule thick, with adjacent molecules just touching, estimate the diameter of the oil slick. Assume the oil molecules have a diameter of 2. 10-10 m.
______m
The density of petrol is 730 kg/m^3 at 0 degrees C. Its average coefficient of expansion is 9.60 * 10^-4 degrees C. Assuming you have a 45 litre full tank, how many extra grams of petrol would you get
A heat engine has a useful work output of 4.0 kJ and expels 8.0 kJ of exhaust energy in each cycle. what is the engine's thermal efficiency
A diatomic gas does 320 J of work and also absorbs 600 cal of heat. What is the change in internal energy of the gas?
Two mirrors meet at a 133° angle. If light rays strike one mirror at 40°, at what angle ? do they leave the second mirror?what is the value of h.
Electrons in a photoelectric experiment emerge from an aluminum surface with a maximum kinetic energy of 2.1eV
A 100g of mass on a spring undergoes Simple Harmonic Motion with amplitude of 25 cm. What is the maximum acceleration of the object
A car starts from rest and travels for 5.0 s with a uniform acceleration of +1.8 m/s2. How fast is the car going at the end of the braking period
A horse pulls a cart with a force of 61 lb at an angle of 25° above the horizontal and moves along at a speed of 8.5 mi/h. What is the average power (in horsepower, hp) of the force
Consider a 53-cm-long lawn mower blade rotating about its center at 3400 rpm. Calculate the linear speed of the tip of the blade
The potential differences across the capacitors are the same only if the capacitances are the same.
The magnetic field due to a currnt pulse in a single long, straight axon nerve fiber is 1.2X10^-10T at a distance 0.0013m from axon. What is the current in the axon
The Tevatron at the Fermi National Laboratory can accelerate protons to a kinetic energy of 1 TeV. In one particular experiment the kinetic energy of the protons is 650 GeV. What is the de Broglie wavelength of these protons
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