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A copper penny has a mass of 3.1 g. Being electrically neutral it contains equal amounts of positive and negative electricity.
How does the mass density compare to the density of individual neutrons (take them to have a radius of 2.3 attometers.
A sound source of 500 Hz with an acoustic power of 1/10 of a watt how do you find the intensity 1/2 a m from the source, the pressure amplitude, and the magnitude of the specific acoustic impedance
Express the work of isothermal reversible expansion of a vanderwaals gas in reduced variables and find a definition of reduced work that makes the overall expression independent of the identity of t
A certain rain cloud at an altitude of 1.75 km contains (3.20 x 10^7) kg of water vapor. How long would it take a 2.70-kW pump to raise the same amount of water from the Earth's surface to the cloud
When a pure sample of tert-butyl bromide is analyzed by gas chromatography, two components are usually observed. One of them is tert-butyl bromide, the other one is a decomposition product.
38 When 2.0 g of aspirin was shaken up in a flask containing two immiscible liquids it was found that the mole fractions in the two liquids where 0.11 and 0.18.
The turbin develops a power output of 1MW. at the inlet the pressure is 6 MPa , the temeperature is 500c and the velocity is 10 m s-1. calculate the rate of heat transfer between the turbine and the
A high pressure container of methane gas which exhibits an absolute pressure of 200 atms at a temperature of O C. A large fire causes the temperature of the cylinder to rise to 1500 C.
The vapour pressure of pyridine is 50.0 kPa at 365.7 K and the normal boiling point is 388.4 K. What is the enthalpy of vaporization of pyridine?
(a) Find the force acting on the electron as it revolves in a circular orbit of radius 5.34 x 10-11 m. (b) Find the centripetal acceleration of the electron.
The change in Gibbs energy that accompanies the oxidation of C6H12O6 (s) to carbon dioxide and water vapor at 250 C is -2828 KJ mol-1. How much glucose does a person of mass 65 kg need to consume t
A person stands on a scale in an elevator. As the elevator starts, the scale has a constant reading of 598 N. As the elevator later stops, the scale reading is 392 N. Assume the magnitude of the acc
A 6300-kg satellite is in a circular earth orbit that has a radius of 3.0 x 107 m. A net external force must act on the satellite to make it change to a circular orbit that has a radius of 8.3 x 106 m
Why is it that Van der Waals can be used to describe the behavior of a real gas? What is the rationale for the equation used and how are the parameters determined?
A proton is fired from far away toward the nucleus of a mercury atom. Mercury is element no.80. If the initial velocity of the proton is 4 x 107 m/s, what is the distance of closet approaching to th
In being launched from rest it moves through a distance of 87 m and has a kinetic energy of 5.00 x 107 J at lift-off. What is the work done on the jet by the catapult?
A pure rock sample believed to be pure calcium carbonate is subjected to chemical analysis and found to contain 51.3% Calcium, 7.7% Carbon and 41.0% Oxygen by mass. Why can't this rock sample be pu
The vertical component of the Earth's magnetic field at this location has a magnitude of 44µT. What is the magnitude of the induced emf between the ends of the beam?
When 1.535 g of methanol (CH3OH) was burned in a constant-volume bomb calorimeter, the water temperature rose from 20.27oC to 26.87oC.
A Sunscreen preparation contains 2.50% by mass benzyl salicylate. If a tube contains 4.0 ounces of sunscreen, how many kilograms of benzyl salicylate are needed to manufacture 325 tubes of sunscree
Draw the vector starting at the rowboat. The location, orientation and length of the vector will be graded. The vector's length is displayed in meters per second.
Gaseous dinitrogen pentaoxide decomposes into oxygen and nitrogen dioxide. If we start with a partial pressure of 200 torr of the N2O5, it's equilibrium pressure is 100 torr. What is the equilibriu
The two shells are fired at the same speed. Assume that air resistance is negligible and that the magnitude of the acceleration due to gravity is .
Now, consider that both shells are fired at an angle greater than 45 degrees with respect to the horizontal. Remember that enemy ship A is closer than enemy ship B A) Which shell reaches the greater