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A 7200kg boxcar traveling at 17.0m/s strikes a second boxcar at rest. The two stick together and move off with a speed of 7.5m/s .What is the mass of the second car?
Express your answer using two significant figures.
A skier is gliding along at 2.8m/s on horizontal, frictionless snow. He suddenly starts down a 10?incline. what is the distance of the incline
An oscillating LC circuit has a current amplitude of8.50 mA, a potential amplitude of 250mV, and a capacitance of 235 nF. What is the maximum energy stored in the capacitor
A block of ice of mass 3.50 is placed against a horizontal spring that has force constant = 210 and is compressed a distance 2.90×10?2. Calculate the work done on the block by the spring
Explain how far west has the sailboat traveled in 29 ? How far north has the sailboat traveled in 29?
Light of wavelength 500 nm is incident on a thin sheet of plastic film (n= 1.50) in air. What is the thinnest the sheet can be
A boy flies a kite with the string at a 30 degree angle to the horizontal. The tension in the string is 4.5N. How much work does the string do on the boy
A long cylindrical copper wire of radius 0.20 cm is surrounded by a cylindrical sheath of rubber of inner radius 0.20 cm and outer radius 0.30 cm. What will be the electric field just outside the rubber sheath
Brad tries out a weight-loss plan that involves repeatedly lifting a 45.0-kg barbell from the floor over his head to a height of 2.3 m. If he is able to complete three such lifts per minute, how long will it take for him to lose 0.50 kg of fat? "Burn..
The charged plates of a parallel plate capacitor each have a charge density of ? C/m2. compute the electric field between the plates
Two 1.5 Volt batteries connected in series to a 5 Ohm resistor produce a 0.7 Amp current. Evaluate the internal resistance of the batteries
The speed of a bobsled is increasing because it has an acceleration of 2.4 m/s^2. At a given instant in time, the forces resisting the motion, including kinetic friction and air resistance, total 450 N. The mass of the bobsled and its riders is 270 k..
What is velocity of the boat relative to the shore
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