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At the seashore, you observe a high-speed aircraft moving overhead at an elevation of 10,000 ft. You hear the plane 8 s after it passes directly overhead. Using a nominal air temperature of 40 °F, estimate the Mach number and speed of the aircraft.
Astronaut Benny travels to Vega, the fifth brightest star in the night sky, leaving his 35.0-year-old twin sister Jenny behind on Earth. Benny travels by a speed of 0.9996 c, and Vega is 25.3 light-years from Earth.
Discover the minimum aperture diameter of a camera that can resolve detail on the ground the size of a person(2.0 m) from an SR-71 Blackbird airplane flying at an altitude of 29 km. (Suppose light with a wavelength of 480 nm.)
A light bulb is placed 22.3 cm in front of a concave mirror. Calculate the focal length of the concave mirror
An inflatable raft (unoccupied) floats down a river at an approximately constant speed of 3.9 m/s. what must be the horizontal distance between the raft and the bridge when the child releases the stone
A bolt on an engine is to be tightened with a maximum torque of 75 Nm. If a wrench has a length of 0.30 m, what is the maximum force perpendicular to the length that should be used to tighten the bolt?
A man bungee jumps off a bridge. After the jump, he is bobbing up and down. It takes 5.71 seconds for him to make one complete cycle. Calculate his frequency of oscillation.
If your lab partner Pat stands at the end of the air track, determine the highest and lowest frequencies she hears. The speed of sound in air is 343 m/s.
The drill bit of a variable-speed electric drill has a constant angular acceleration of 3.15 rad/s2. The initial angular speed of the bit is 5.95 rad/s. what is the bit's angular speed
A hijacked airplane flies127 km north from its last-known location, then flies at a heading (degrees clockwise from north) of 143 degrees for 384 km. What is its distance and heading from its last-known location
A microwave oven is powered by an electron tube called a magnetron that generates electromagnetic waves of frequency 2.25 GHz, Calculate the speed of the microwaves from these data.
a record is turning at the rate of 33 r.p.m. when the 45 r.p.m. button is pressed. what is the angular acclereration of the record
A laser is used in eye surgery to weld a detached retina back intoplace. The wavelength of the laser beam is 514 nm, while the poweris 1.5 W. how many photons are emitted by the laser
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