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A car is moving to the left at 20 m/s while a truck is moving to the right at 25 m/s. If the truck emits a sound of frequency 5000 Hz, what is the perceived frequency, in Hz, of the sound by the driver of the car? Assume the vehicles are moving directly away from each other on a 20.0° C day.
What are the original charges on each sphere
What centripetal force does an 80-kg passenger experience when seated 12 m from the center of the Ferris wheel whose angular speed is 0.50 rad/s.
An artillery shell is fired with the initial velocity of 300 m/s at 54.7° above the horizontal. To clear an avalanche, it explodes on the mountainside 55.0 s after firing. What is the x and y components of the shell where it explodes, relative to its..
If air drag is negligibly small, how fast is sequoia cone moving while it reaches the ground if it dropped from the top of a 114 tree.
A 240-V dc motor has an armature whose resistance is 1.10? . When running at its operating speed, it draws a current of 16.0A, What is the back emf of the motor when it is operating normally
The rocket fires for 10 mins , after that the asteroid is moving at 30 degrees to its original path at the speed of 18 km/h/ Find its average acceleration.
A particular nucleus of the element plutonium contains 94 protons and 150 neutrons. What is the magnitude of the force from the nucleus on a single electron that is at a distance of 0.563 × 10-12 m from the plutonium nucleus.
Two very small spheres, each with a mass m = 1.5 g, are suspended from a common axis by insulating threads of length L= 6.0 cm, What is the magnitude of the unknown charge q
The measured conductivity of Cu at Room Temperature is 5.88 x 107/ohm.m and the Fermi energy for Cu is 7.03 eV, Find the mean free path( mfp) of electrons in copper
Find out the magnitude and direction of the initial velocity.
n a cathode ray tube, electrons are accelerated from rest by a constant electric force of magnitude 6.6 ? 10-17 N during the first 1.9 cm of the tube's length, Find the speed of the electrons when they hit the screen
a detector has a sensitivity of 10^6 V/W and a NEP* = 10^-10 W/Hz^1/2. Light of 1E-6 W power is measured with the detector, what is the signal
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