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A commuter train passes a passenger platform at a constantspeed of 45.0 m/s. The train horn issounded at its characteristic frequency of 320 Hz.
(a) What overall change in frequency isdetected by a person on the platform as the train moves fromapproaching to receding?
Hz
(b) What wavelength is detected by a person on the platform as thetrain approaches?
m
A horse pulls a 300 kg wooden sleigh in the snow via a massless rope. The sleigh is towing a 50 kg wooden box behind it via another massless rope. What is the acceleration of the sleigh
two billiard balls have velocities of 2.0 m/s and -1.0 m/s when they meet in an elastic head-on collision. What is the final velocity of the first ball after collision
The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.870, and the log has an acceleration of 0.800 m/s2. Find out the tension in the rope.
q1. compute earths gravitational force on the shuttle astronauts while orbiting at an altitude of 220 miles or 354 km
A line of charge starts at x = +x0 and extends to positive infinity. The linear charge density is ? = ?0x0/x, Determine the electric field at the origin
You are designing a diving bell to withstand the pressure of seawater at a depth of 220 m. What is the gauge pressure at this depth? (You can ignore changes in the density of the water with depth.)
A cylindrical solenoid 40cm long with a radius of 5 mm has 300 tightly wound turns uniformly distributed along its length. Around the middle of the solenoid is a two-turn rectangular loop 3 cm by 2 cm made of resistive wire having a resistance of ..
How fast (in ) must a centrifuge rotate if a particle 5.4 from the axis of rotation is to experience the acceleration of 300000 's.
A mixture of ozone and oxygen contaning 20% by volume of ozonediffused through a porous plug in 172seconds, Calculate the molecular weight of ozone
An aluminum wire having a cross-sectional area equal to 2.70 10-6 m2 carries a current of 6.50 A. The density of aluminum is 2.70 g/cm3. calculate the drift speed of the electrons in the wire
A veterans' group wishes to honor General MacArthur by putting a statue of him on a pedestal of Douglas fir. What is the maximum mass of the statue before the pedestal suffers a compressive failure
Setting a world record in a 100m race, Maggie and Judy cross the finish line in a dead heat, both taking 10.0 s. Accelerating uniformly, Maggie took 2.0 s and Judy 2.5 s to attain maximum speed that they maintained for the rest of race.
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