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Diagnostic ultrasound of frequency 4.50 MHz is used to examine tumors in soft tissue.
(a) What is the wavelength in air of such a sound wave?
m
(b) If the speed of sound in tissue is 1900 m/s, what is the wavelength of this wave in tissue?
An RLC circuit is connected to a 220 V 60 Hz ac voltage source. Determine the power loss in the circuit
A man slides along a long water slide and then being launched into the air to land in a water pool. Find the magnitude of the velocity at landing
A Federation starship (7.5 multiplied by 106 kg) uses its tractor beam to pull a shuttlecraft (5.0 multiplied by 104 kg ) aboard from the distance of 12 km away.
Two metal spheres, each of mass 20 g and initially at rest, are dropped from a height of 9 m in an evacuated chamber. Find the difference in final speeds of the two spheres
A 32.0 kg hammer strikes a steel spike 2.70 cm in diameter while moving with speed of 24.0 m/s. The hammer rebounds with speed 11.0 m/s after 0.110 s. What is an average strain in the spike all through the impact.
A monochromatic beam of light of wavelength 600 nm is incident normally on a diffraction grating with a slit spacing of 1.70 × 10-4 cm
A tennis player receives a shot with the ball (0.060 0 kg) traveling horizontally at 52.5 m/s and returns the shot with the ball traveling horizontally at 38.5 m/s in the opposite direction
A motorboat heads due east at 11.00 m/s across a river that flows toward the south at a speed of 3.40 m/s. What is the resultant velocity relative to an observer on the shore? If the river is 1360m wide, how long does take the boat to cross.
A 2.0 mm-diameter glass bead is positively charged. The potential difference between a point 2.2 mm from the bead
Suppose you throw a 0.048-kg ball with a speed of 10.7 m/s and at an angle of 32.1° above the horizontal from a building 11.5 m high. What will be its kinetic energy when it hits the ground
To get back to the shuttle, the astronaut unstraps a 10-kg tool kit and throws it away with a speed of 8 m/s. In the script, the astronaut, who has a mass of 80 kg without the toolkit, survives, but is this accurate.
A 0.145-kg baseball pitched horizontally at 27 m/s strikes a bat and is popped straight up to a height of 25 m. calculate the average force [exerted by the bat on the ball] during contact
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