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Calculate the molarity and the molality of an NH3 solution made up of 30.0 g of NH3 in 70.0g of water. The density of the solution is 0.982 g/mL. (Notice that we are using both molarity and molality)
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 popoular size of scuba diving take is 71.2 ft3 because this is the volume that the compressed air inside the tank
An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. If the asteroid slows down over a distance of 1.3× 106 m determine the magnitude of the force
A skier (m=63.0 kg) starts sliding down from the top of a ski jump with negligible friction and takes off horizontally. If h = 6.10 m and D = 12.2 m, find H.
A block of mass 1 kg is on a turntable 0.5 m from the center of the turntable. Find the angular speed of the turntable as a function of time
A commuter train blows its horn as it passes a passenger platform at a constant speed of 30.0 m/s. The train horn sounds at a frequency of 305 Hz when the train is at rest.
Anelastic conducting material is stretched into a circular loop of15.0 cm radius. It is placed with itsplane perpendicular to a uniform 0.800T magnetic field. What emf is induced in the loop at that instant
Larger wavelengths diffract more than smaller wavelengths. how long in years would it take the person to move a distance of one meter
A 20kg box slides up a 12m long incline at an angle of 30 degrees with the horizontal. What is the change in gravitational potential energy
A defibrillator is used during a heart attack to restore the heart to its normal beating pattern. How much charge moves during this time
A physical pendulum consists of auniform rod of length L = 1.5 meters. What is the angular kinetic energy of the rod after 1.0 sec
A car of mass 3.0 x10^3 kg traveling at a speed of 20 m/s is passing a truck of mass 7.0x10^3 kg traveling at a speed of 10 m/s in the same direction along the same straight line
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