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Diagnostic ultrasound of frequency 6.10 MHz is used to examine tumors in soft tissue.
(a) What is the wavelength in air of such a sound wave?
(b) If the speed of sound in tissue is 1975 m/s, what is the wavelength of this wave in tissue?
A person pulls a toboggan for a distance of 39.7 m along the snow with a rope directed 33.0 ° above the snow. How much work is done on the toboggan by the tension force
Two current-carrying wires are exactly parallel to one another and both carry 3.5 A of current. What is the direction of the magnetic force caused by wire 2 on wire 1
A 66 kg crate is dragged across a floor by pulling on a rope attached to the crate and inclined 15° above the horizontal. what is the magnitude of the initial acceleration of the crate
One way to attack a satellite in Earth orbit is to launch a swarm of pellets in the same orbit as the satellite but in the opposite direction. Suppose a satellite in a circular orbit 360 km above Earth's surface collides with a pellet having mass ..
You are pushing a 150-kg wooden crate in a straight line a distance of 4.5 m across a wooden floor at constant speed. What is the work done by friction on the crate
Three beads are placed along a thin rod. The first bead has a mass m1=28g placed at a distance d1= 0.7 cm from the left of the rod. Calculate the numeric value of location of the center of mass relative to the middle bead in cm
compute the force exerted by the man, the work done by the man on the piano, the work done by the friction force, the work done by the force of gravity, and the net work done on the piano.
There is a specific case where for a single converging lens the object distance equals the image distance. Find the relation between the focal length and the object distance in this case
at a junction in an a-c circuit a single current divides into two seperate currents I1=10,, I2=5, where I1 lags I2 by 30, use comlex numbers to represent currents.
A solid disk of mass M= 2.0 kg and radius R= 0.25 m rotates at an angular velocity of 0.50 rad/s with respect to an axis perpendicular to the disk at its center. what is the angular velocity of the disk
What is the capacitance of a pair of circular plates with a radius of 9.0cm separated by 3.2mm of mica?
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.50 104 m/s, and the radius of the orbit is 5.45 106 m. What is the orbital speed of the second satellite
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