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A 1055 kilogram van, stopped at a traffic light, is hit directly in the rear by a 660 kilogram car traveling with a velocity of +1.95 m/s. Suppose that the transmission of the van is in neutral, the brakes are not being applied, and the collision is elastic. Determine the final velocity of each vehicle?
(a) car
m/s
(b) van
A sample of gold of volume 2.00*10^-5 m^3 is available to make a wire. If the length of the wire is to be 50.0 cm and all the gold is used, what will be resistance of the wire? (Gold has a resistivity of 2.44*10^-8Ωm and a temperature coefficient of ..
You are standing between two plane mirrors that are parallel to each other. How many total images of you would there be formed by this arrangement
A starship moving toward Earth with a speed of 0.80 c launches ashuttle craft in the forward direction. What is the speed of the shuttle relative to the starship
Air at 80 kPa, 27 degrees C and 220 m/s eneters a diffuser at a rate of 2.5 kg/s and leaves at 42 degrees C. the exit area of the diffuser is 400 cm2. the air is estimated to lose heat at a rate of 18 kJ/s during this process.
Heat Q flows spontaneously from a reservoir at 445 K into a reservoir at 265 K. Because of the spontaneous flow, 2620 J of energy is rendered unavailable for work when a Carnot engine operates between the reservoir at 265 K and a reservoir at 248 K. ..
a tank having a volume of 0.100 m3 contains helium gas at 140 atm. how many balloons can the tank blow up if each
A Girl is pushing on a 45 kg dresser with 300 N of force. The dresser has a coeficient of statice friction of 0.83 and a coeficient of kinetic friction of 0.55. How much is the force of friction on the dresser
A pipe carrying 20°C water has a diameter of 2.4 cm. Estimate the maximum flow speed if the flow must be streamline
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. What is the apparent weight of a 2000 kg satellite in a geosynchronous orbit
In opening the door, a person pushes at a point on the door 65 cm from the hinges with a force of 50 N that is directed at an angle of 75 degree with respect to the surface of the door
A runner of mass m runs around the edge of the horizontal turntable mounted on a vertical, frictionless axis through its center. The runner's velocity relative to earth has magnitude v.
A tube of mercury with resistivity 9.84*10^-7 *m has a 23 N/C electric field inside the column of mercury. How much current is flowing, if the diameter of the tube is
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