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An ambulance siren has a frequency of 440 Hz as heard by the driver. What frequency is heard by a pedestrian as the ambulance approaches him at a speed of 32.0 m/s?
Orb spiders make silk with a typical diameter of 0.15 .A typical large orb spider has a mass of 0.50. If this spider suspends itself from a single 12-cm-long strand of silk, by how much will the silk stretch
A satellite is in a circular orbit around the earth. The period of the satellite is 22 hr.
Gas is contained in an7.4L vessel at a temperature of 20°C and a pressure of9.2atm. Determine the number of moles of gas in the vessel
A bicyclist rides 3.19 km due east, while the resistive force from the air has a magnitude of 8.83 N and points due west. Find the work done by the resistive force during the round trip
A motor has a single loop inside a magnetic field of magnitude 0.581 T. If the area of the loop is 305.0 cm2, find the maximum angular speed possible for this motor
A current of 15.0 mA is maintained in a single circular loop with a circumference of 3.30 m. find the magnitude of the torque exerted by the magnetic field on the loop
A simple pendulum has a period of 2.5 s. What is its period if its length is made four times larger
A 25.0-g object moving to the right at 16.0 cm/s overtakes and collides elastically with a 9.0-g object moving in the same direction at 15.0 cm/s
during a nascar race a car goes 50 ms around a curved section of the track that has a radius of 250 m. what is the cars
The plates of a spherical capacitor have radii 36.2 mm and 40.3 mm. Calculate the capacitance in picofarads
Two ice skaters, Daniel (mass 70.0 ) and Rebecca (mass 45.0 ), are practicing. Daniel stops to tie his shoelace and, while at rest, is struck by Rebecca, What is the magnitude of Daniel's velocity after the collision
A satellite of mass 240 kg is in a circular orbit of radius 8.68 x106 m around a planet. If the period is 9030 s, what is the mechanical energy of the satellite
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