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A police car is moving at 38m/sec to catchup with a speeder directly ahead. The speed limit is 29.1 m/sec. Police car radar clocks the speed of other car by by emmitting microwave radiation of frequency 3E10 Hz and observing frequency of reflected wave. The reflected wave when combined with outgoing wave produces beat at rate of 1400 sec^-1. How fast is speeder going?
q1. a child is sliding on a sled at 1.6 rm ms to the right. you stop the sled by pushing on it for 0.80 rm s in a
A steel wire of length 1.97m with circular cross section must stretch no more than 0.270cm, What minimum diameter dmin is required for the wire
Sodium light of wavelength 589nm falls on a diffraction grating and its first-order peak on a screen 60.0cm away falls 3.32cm from the central peak. How many lines per cm does the grating have
A series circuit with R=100ohms, L=.5H and C=50 MuF is driven by an ac signal of frequency 75 Hz and amplitude of 18V. what are the rms values of the voltage and current
Each plate of a parallel-plate capacitor is a square of side 0.0339 m and the plates are separated by 0.407 × 10-3 m. Find the electric field strength inside the capacitor
A bottle with a volume of 194 U. S. fluid gallons is filled at the rate of 1.9 g/min. How long does the filling take
An old Chrysler with mass 2300 kg is moving along a straight stretch of road at 89 km/h. How fast (in km/h) is the center of mass of the two cars moving
His arm is 70 cm long and has a mass of 4.0 kg. Evaluate the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor?
q1. a certain compact disc player draws a current of 290 ma at 36.0 v. how much power is necessary to operate the
A car travels a straight road at 130 km/h for 30min then at 50 km/h for 10min. What is the average speed for the entire trip
An object is placed to the left of the converging lens, and the final image produced by the two-lens combination lies 21.2 cm to the left of the diverging lens. How far is the object from the converging lens
Scientists in a laboratory produce a sound wave in a simulated environment (air) with a velocity of 448 m/s. What is the temperature (in Kelvin) of the environment
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