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A lidar (laser radar) gun is an alternative to the standard radar gun that uses the Doppler effect to catch speeders. A lidar gun uses an infrared laser and emits a precisely timed series of pulses of infrared electromagnetic waves. The time for each pulse to travel to the speeding vehicle and return to the gun is measured. In one situation a lidar gun is a stationary police car observes a difference of 1.21 x 10-7 s in round-trip travel times for two pulses that are emitted 0.430 s apart. Assuming that the speeding vehicle is approaching the police car essentially head-on, determine the speed of the vehicle.
Seven grams of water are placed in a 2.03 liter pressure cooker and heated to 488 deg C. What is the pressure inside the container
a 3.95 mol sample of an ideal diatomic gas expands adiabatically from volume of 0.1820 m3to 0.710m3, Determine the initial and final temperatures
A concave spherical mirror has a radius of 20 cm. A real object is placedon the optical axis 15 cm from the mirror. Compute where the image is and describe i
write a problem containing at least three forces of different magnitudes and directions which results in a constant
Volcanoes on the Earth eject rocks at speeds of up to 160 m/s. Consider a 1260 m high volcano that ejects rocks in all directions. What is the maximum height above sea level reached through rocks.
Hydraulic stamping machines exert tremendous forces on a sheetof metal to form it into the desired shape. How large a force does the press exert on the sheet being formed
A helium balloon lifts a basket and cargo of total weight 2080 N under standard conditions, What is the minimum volume of the balloon
For the real or imaginary nucleus of 85X210, find the net electrical charge of the nucleus, the approximate radius of the nucleus, and the nuclear density
a 100W light bulb connected to a 12.0 V source experiences a voltage surge that produces 14.0V for a moment. By what percentage does its power output increase
An electron drops from the L shell to the K shell and givesoff an X-ray with a wavelength of 0.0200 nm. What is the atomic number of this atom
A person can just see this bulb from a distance of 800m, with the pupil diameter dialated to 7.5mm, how many photons per second are entering the pupil
A river flows at a speed of 12m/s from north to south. A powerboat can move at a constant maximum speed of 23 m/s in still water. find the maximum velocity of the boat traveling upstream
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