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in fresh water, sound travel at a speed of 1460m/s in the cold air sound travel in speed of 331m/s. suppose that an explosive charge explodes on the surface of the body of water. A man with his head underwater hears the bang of the explosion, and in lifting his headout f the water, he hears the bang again 2.25 s later, how far is he from the site of the explosion?
Calculate the vapor pressure of ethanol at 30C (in mm Hg). Bp of ethanol 76 C.
Assuming that the heat capacities don't change with temperature, how much energy in kilojoules is needed to heat 5.25g of Hg from a temperature of -59.5C to 43.0C
You have just been promoted from front-line supervisor to be one of the firm's senior managers. During your business education, you learned that the primary role of a manager is to make good decisions. As a supervisor, you had frequently been making ..
A solution is prepared by mixing 50.0 mL of 0.18 M Pb(NO3)2 with 50.0 mL of 1.0 M KCl. Calculate the concentrations of Pb2+ and Cl - at equilibrium. Ksp for PbCl2(s) is 1.6 *10-5.
A rifle is test fired into a ballistic pendulum. The bullet embeds itself in the block of mass 0.55kg that makes up the bob of the pendulum. What is the muzzle velocity of the rifle
What is the age of a rock whose Argon 40 / Potassium 40 ratio is 1.55. The half life of Potassium 40 is 1.28 x 10^9 years.
A cylinder of solid material weight 10.5 kg i the air, and 9.00 kg when submerged in water and 3 kg when submerged in another liquid. determine the density of the cylinder
Identify (3) examples of simple systems.
An uncovered cup (1/2 pint) of trichloroethane (d=1.325 g/mL) is kept in an 18-ft3 refrigerator at 39 F. What percentage (by mass) of trichloroethane is left as a liquid when equilibrium is established
A solid disk of radius 1.60 m and mass 2.30 kg rolls without slipping to the bottom of an inclined plane. If the angular velocity of the disk is 4.27 rad/s at the bottom, what is the height of the inclined plane
The suspended 2.82 kg mass on the right is moving up, the 2.2 kg mass slides down the ramp, and the suspended 8.1 kg mass on the left is moving down. There is friction between block and ramp. What is the acceleration of a three block system.
A three level laser has energy levels E 1=1.50 eV, E 2=2.50 eV, and E 3=3.50 eV. Level E 2 is the metastable state. What is the lasing wavelength
Assume a load resistor RLoad is placed in parallel with a 12 volt battery, calculate the internal resistance of the battery
Unpolarized light passes through 5 parallel ideal polarizing filters. What is the ratio of the initial intensity to the final intensity of the light
Humid air breaks down in a sufficiently strong electric field, What is the magnitude of the electrostatic force for an electron and for an ion with a single electron missing
A large wooden turntable in the shape of a flat disk has a radius of 2.05m and a total mass of 130kg. Find the angular speed of the turntable after the parachutist lands
A 5kg block initially at rest is pulled to the ight along a horizontal surface by a constant, force of 30N acting at 53 degrees above the horizontal. Find the net work done on the block
A 6.00kg block is pushed 9.25m up a smooth 39.0? inclined plane by a horizontal force of 73.0N. Calculate the initial kinetic energy of the block
A fighter jet is launched from an aircraft carrier with the aid of its own engines & a steam-powered catapult. The thrust of its engines is 2.3 x 105 N. In being launched from rest it moves through a distance of 87 m & has a kinetic energy of 4.5 ..
A laserpointer has a beam intensity of 37 W/m2 and a beam radius of 3.1 mm. what is the force on the car
For each part of the following, state any assumptions used and show mathmatical dereviation before using values. determine the rotential inertia of a yo-yo about it's center
In a certain particle accelerator, a current of .5mA is caried by a 5-MeV proton beam that has a radius of 1.5 mm. Find the power consumption of the accelerator
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