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Two canoes are tied together and traveling down a river with the current. Spotting a waterfall, the two canoeists cut the rope and push off of each other to try and reach opposite banks of the river. They are in the middle of the river and will reach the waterfall in 4 s. One canoe and its rider have a combined mass of 85 kg and reach the shore in 3.4 s. The other canoe and rider reach the opposite shore just in time at 3.9 s. What is the combined mass of this canoe and rider?
A roller coaster shown below is built in your town. The radius of the circular part is 20 meters. As a physics student, you are invited to take the first ride. Find the speed of the car at the top of the circle
A pendulum has a time period of 5 sec at a particular place. calculate the acceleeration due to gravity at this place
A stationary particle of charge q = 2.4 × 10-8 C is placed in a laser beam (an electromagnetic wave) whose intensity is 2.7 × 103 W/m2. Determine the maximum magnitude of the electric force
questiona violet and a red beam of light with wavelengths of 400nm and 700nm respectivelynbspat the same time strike an
A large mirror is hung from a nail. The supporting steel wire has a diameter of 0.20 mm, What is the distance between the nail and the top of the frame when the mirror is hung
A gas undergoes two processes. In the first, the volume remains constant at 0.200 m3 and the pressure increases from 2.00 105 Pa to 5.10 105 Pa. Find the total work done by the gas during both processes
Early in the morning, when the temperature is 5.0°C, gasoline is pumped into a car's 45 L steel gas tank until it is filled to the top. How much gasoline spills out in this case
compute the force of the Earth's gravity on an electron and evaluate it with the force exerted on the electron by an electric field of magnitude 12500-V/m (a relatively small field). The mass and charge of an electron are given on the inside back ..
A sample of animal bone unearthed at an archaeological site is found to hold 173 grams of carbon and the decay rate of 14-C in the sample is measured to be 8.10 Bq. How old is the bone.
An 845-N sled is pulled a distance of 170 m. The task requires 1.10 x10^4 J of work and is done by pulling on a rope with a force of 12N. At what angle is the rope held.
A car drives straight off the edge of a cliff that is 58 m high. The police at scene of the accident observed that the point of impact is 121m from the base of cliff. How fast was the car traveling when it went over the cliff.
An object moves 20 m east in 30 s and then returns to its starting point taking an additional 50s. what is the average speed of the object
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