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When an ambulance is stationary, the siren gives off a sound at a frequency of 500 Hz. In answering the following questions assume that the speed of sound is 340 m/s. What is the frequency of the stationary siren as perceived by an observer in a car driving toward the ambulance at 25 m/s?
A large population of aloha users manage to create 50 request/sec,including both originals and retransmissions.time is slotted in units 40msec.
A flat conductor of thickness 0.500 mm is placed in a magnetic field of 0.200 T perpendicular to the flat surface. what is the Hall voltage generated when 3.40 A flows along the conductor
A proton moving at 7.20 106 m/s through a magnetic field of magnitude 1.74 T experiences a magnetic force of magnitude 7.40 10-13 N. What is the angle between the proton's velocity and the field
A horizontal disk of mass 0.12kg and radius of 013m rotates freely about a vertical axis through its center with an angular speed of 5rad/s. What is the angular speed of the disk immediately after the material sticks to it
A cannon ball is shot straight upward with a velocity of 77.50 m/s. What is the maximum height attained by the cannon ball
A proton is released from rest inside a region of constant, uniform electric field E1 pointing due North. 29.8 seconds after it is released, What is the ratio of the magnitude of E2 to the magnitude of E1
a 9.5-uC charge is at x = 15 cm, y = 5.0 cm and a -3.2-uC charge is at x = 4.4 cm, y = 11 cm. Find the force on the negative charge
Describe the operation of a scanning tunneling microscope and explicitly include how it involves barrier tunneling.
A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 4.57 m/s relative to the ground. How fast is the train moving
A runner wearing spiked shoes pulls a 18 kg sled across frictionless ice using a horizontal spring with spring constant 170 N/m. What is the acceleration of the sled
q1. a horizontal uniform bar of mass 2.6 kg and length 3.0 m is hung horizontally on two vertical strings. string 1 is
Charge Q = 17E-8 C is placed in the origin. Location A is -3.00m from the charge while location B is 2.00m from the charge. A) Find the potential difference VB - VA between the two points. B) Which point is at the higher potential? Type either "Po..
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