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A train 300 m long is moving on a straight track with a speed of 83.2 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 17.5 km/h. assuming constant acceleration, decide how long the train blocked the crossing. Disregard the width of the crossing.
Two isotropic point sources of light (S1 andS2) are separated by a distance d = 250μm along a yaxis and emit in phase at wavelength 841nm and at the sameamplitude. A light detector is located at point P at coordinatexp on the x axis.
Assume your car was modified so you could travel through space. At a velocity of 65 mi/hr, and driving non-stop, how long would it take for you to get to.
In addition to the line, lambda = 2537 angstroms, the mercury spectrum has a strong line at lamda = 1849 angstroms. In an experiment, at what voltage would one expect a current drop associated with the second line?
When the starter motor on a car is engaged, there is a 330A current in the wires between the battery and the motor, What minimum diameter can the wires have if the voltage drop along the wires is to be less than 0.45V
A 1.02 liter flask contains a certain quantity of ideal gas at 315 K. Then an equal number of molecules of the same gas are added to the flask, after which the absolute pressure is 1.60 times its original value. What is a final temperature.
You are at a state fair. A sideshow barker claims that the star of the show can throw a 7.3 kilogram Olympic-style hammer faster than a speeding bullet. determine is it really moving faster than a bullet
A copper wire of radius a = 0.235 mm has an aluminum jacket of outer radius b = 0.302 mm. There is a current i = 1.56 A in the composite wire. Take the resistivity for copper and aluminum to be 1.69 x 10-8?·m and 2.75 x 10-8?·m. Calculate the current..
A camel sets out to cross the desert, which is 45.2 km wide in the north-south direc- tion. Calculate the camel's eastward displacement while he crosses the desert
A very small charged block with a mass of 2.35 g is placed on an insulated, frictionless plane inclined at an angle of 17.0° with respect to the horizontal, find the sign and magnitude of the charge on the block
a car traveling 85 kmhr strikes a tree. the front end of the car compresses and the driver comes to a rest after
four moles of an ideal gas are caused to expand from a volume v1 to a volume v2 2v1.a if the expansion is isothermal
During the design of a ski ramp, for safety it was decided that a skier should have a speed of no more than 30 m/s when reaching the bottom of the ramp. It is known that a typical 85 kg skier has a speed of 2 m/s upon leaving the starting gate at ..
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