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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.
If the elastic limit of steel is 5.0 multiplied by 108 Pa, determine the minimum diameter a steel wire can have
The resonant frequency of a series RCL circuit is 10.2 kHz. The inductance and capacitance of the circuit are each doubled. What is the new resonant frequency
the allowed energies of a simple atom are 0.0 ev 5.0 ev and 8.0 ev. an electron traveling at a speed of 1.8times106 ms
q1. a cylindrical container with a cross-sectional area of 65.2 cm2 holds the fluid of density 846 kgm3. at the bottom
a-6-nc point charge is located at the center of a conducting spherical shell. the shell has an inner radius of 2 m an
What should be the least kinetic energy in electron volts
A bat crashes into the vertical front of an accelerating subway train. If the coefficient of friction between the bat and the trainis 0.86, what is the minimum acceleration of the train that willallow the bat to remain in place?
gasoline flows into a storage container at the rate of 32.5galmin. the storage container is 13.0 ft wide 17.0 ft long
The total electric flux from a cubical box 40.0cm on a side is 2280 Nm^(2)/C. What charge is enclosed by the box
The International Space Station is orbiting the Earth at an altitude of about 340 Km above the Earth's surface, find the size of the tangential velocity of the Space Station
a 11.5 nc charge is at x 0 cm and a -1.0 nc charge is at 6 cm. at what point or points on the x-axis is the electric
A 30.0g ball rolls around the 40.0cm diameter hemishperical track at 60.0rpm. Assume rolling friction is negligible. Determine the ball's linear velocity
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