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An ambulance traveling at 38 m/s approaches a car heading in the similar direction at a speed of 27 m/s. The ambulance driver has a siren sounding at 560 hertz. Find at what frequency does the driver of the car hear the siren? (Suppose a temperature of 20° C.)
An unknown resistor is connected between the terminals of a 5.5 V battery. At what rate is energy now dissipated
a biconvex ice lens is made so that the radius of curvature of the front surface is 12.3 cm and that for the back is
The nucleus of a hydrogen atom is a single proton, which has a radius of about 1.2 × 10-15 m. What is the ratio of the density of the hydrogen nucleus to the density of the complete hydrogen atom
a 70.0 kg man jumps 1.00 m down onto a concrete walkway. His downward motion stops in 0.0200 seconds. what force is transmitted to his leg bones
An ac voltage source is connected in series with a1.4-?F capacitor and a 690-? resistor. Using a digital ac voltmeter, the amplitude of the voltage source is measured to be 4.0?V rms, Determine the frequency of the ac voltage source
A 60.0 kg person running at an initial speed of 4.00 m/s jumps ontoa 120 kg cart initially at rest. determine the final velocity of the person and cart
A 12-kg box is free from the top of an incline that is 5.00m long and makes an angle of 40 degrees to the horizontal. A 60-N friction force impedes the motion of the box.
An athlete rotates a 1.00-kg discus along a circular path of radius 1.04 m, Determine the magnitude of the maximum radial acceleration of the discus
A 13.00 g bullet travelling 236 m/s penetrates a 2 kg block of wood and emerges cleanly at 179 m/s. If the block is stationary on a frictionless surface as hit, how fast does it move after the bullet emerges.
how long does it take the sun to melt a block of ice at 0 with a flat horizontal area 1.0 and thickness 2.0 ? assume
A point source of light is 40.0 cm below the surface of a swimming pool (for water, n=1.333). Find the diameter of the largest circle
The position vector of a particle of mass 1.80 kg as a function of time is given by r = (6.00i + 4.60t j ), where r is in meters and t is in seconds. Determine the angular momentum of the particle about the origin as a function of time. Answer should..
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