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The low range of frequencies used for medical applications is about 1,000,000 Hz. What is the wavelength of this frequency in air?
A 60 kg crate is lowered using arope over a fixed support. The rope exerts a constant upward forceof 500 N.? How fast is the crate traveling when it hits the floor
A crane drops a 1.0 kg steel ball onto a steel plate. The balls speed just before impact is 2.0m/s. what is the bounce back speed right after the impact
A lead bullet (? = 11.3 X 103 kg/m3) is placed in a pool of mercury (? = 13.6 X 103 kg/m3). What fractional part of the volume of the bullet is submerged
Two charges are separated by a distance d and exert mutual attractive forces F on each other. what are the new mutual forces
Two loudspeakers are placed above and below each other and driven by the same source at a frequency of 4.50x10^2 Hz. An observer is in front of the speakers (to the right) at point O.
A uniform 1.0 kg cylinder of radius 0.10 m is suspended by two strings wrapped around it. What is the acceleration of the center of mass of the cylinder
A dolphin located in sea water at a temperature of 25°C emits a sound directed toward the bottom of the ocean 100 m below
What is the kinetic energy of a 0.5-kg object moving at a constant speed of 2 m/s?
A high-speed flywheel in a motor is spinning at 450rpm when a power failure suddenly occurs. How many revolutions would the wheel have made during this time
A diver springs upward with an initial speed of 2.19 m/s from a 3.0-m board. What is the highest point he reaches above the water
A luminous object 3.0 mm high is placed 200 mm from a convex mirror of radius of curvature 200 mm. Show that the (negative) image distance can be computed using a focal length of -100mm. Compute the image size?
Points A and B have electric potentials of 320 and 160, respectively. When an electron released from rest at point A arrives at point C, its kinetic energy is.
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