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Assume the sound speed in air is 343 m/s. A parachutist leaps from a hovering helicopter and after 3.1s of free fall shouts back toward the helicopter. If the shout emitted at 428 Hz, what frequency is heard on the helicopter?
Illustrate what is the minimum centripetal acceleration the truck must have going around the circular curve with radius 0.35 km so that it will clear the gully and land on the other side?
A cylindrical tank 8 m in diameter is constructed of sheet iron 1.0 mm thick. The tank contains 2.3 m of water overlying 1.2 m of mud, Calculate the maximum stress in the tank
A circular coil with a radius of 20 cm and containing 60 turns is placed in a uniform magnetic field which makes an angle of 30 degrees with respect to the plane of the coil, find the magnitude and direction of the induced current in the coil
The electric field between two equal but opposite point charges, at a point four-ninth the distance from the negative charge to the positive charge, is 4.39*10
In diving to a depth of 983 m, an elephant seal also moves 693 m due east of his starting point. What is the magnitude of the seal's displacement
A 15.0{rm cm}-diameter non-conducting sphere carries a total charge of 2.25 mu {rm C}, distributed uniformly throughout its volume. Graph the electric field E as a function of the distance r from the center of sphere from r = 0 to r = 30.0{rm{ cm}..
Would a plucked guitar sting vibrate for a longer time or a shorter time if the instrument had no sounding board? explain.
Two blocks are connected by a cord passing over a small (frictionless) pulley as shown below. The angle ? = 30 degrees, what is the mass, M, of the large block
What is walking speed if the speed drops. after an exciting but exhausting lecture, a physic lecture stretch out for a nap on a bed of nails, suffering no injury and only moderate discomfort. how is this possible.
What is the half-life in days of a radioactive sample with 5.2×1015 atoms and an activity of 5.1×108Bq ? What is the half life in days
A 1.2µF capacitor is charged to a potential difference of 11.0V. The wires connecting the capacitor to the battery are next disconnected from the battery and connected across a second, initially uncharged, capacitor. The potential difference across t..
What is the mass of a puppy that sits on the other piston and balances the person?
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