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Assuming normal temperature and pressure outside, and normal pressure inside, what must be the inside temperature (in Celsius) if the hot air balloon has diameter 17 meters and carries 446.3 kg load? (Except the mass of air inside, everything else is included in the "load")
An instrument that uses 589-nm light has an antiglare coating of thickness 357 nm on a lens made of glass of index 1.55. Estimate what the index of the coating
A 60.0-mW pulsed laser produces a pulse of EM radiation with wavelength 1060 nm (in air) that lasts for 20.0 ps (picoseconds). In what part of the EM spectrum is this pulse? How long (incentimetres) is a single pulse in air? How many wavelengths fit..
the bent rod is supported at a b and c by smooth journal bearings. determine the magnitude of f2 which will cause the
A particular radioactive source produces 150 m rads of 2.5 MeV gamma rays per hour at a distance of 1 m. How long could a person stand at this distance before accumulating an intolerable dose of 1 rem
A ball player hits a home run,and the baseball just clears a wall 8.00 m high located124.0 m fromhome plate. The ball is hit at an angle of 39.1? to the horizontal, andair resistance is negligible.
A car moving at 35 m/s approaches a stationary whistle that emits a 220Hz sound. The speed of sound is 343m/s. What is the frequency of sound heard by the driver of the car
The water is near freezing in temperature. Typically a human can only swim in such water for about 300 seconds (or 5 minutes) before hypothermia sets in. Calculate the time the explorer spends in the water
A "red-hot" object is measured to have a frequency of 1.0x 10^14 Hertz. Determine what is the Celsius temperature of the object
A model rocket fired vertically from the ground ascends with avertical acceleration of 3.2m/s2 for 6.0 s. Its fuel isthen exhausted, so it continues upward as a free-fall particle andthen falls back down.
Find the shear strain that results if a force of magnitude 8×10^5 is applied to the top square face of the plate, parallel to the side, and a force of equal magnitude is applied in the opposite direction to bottom face of the plate.
A circular bird feeder 20 cm in radius has rotational inertia 0.12kg*m^2 . The feeder is suspended by a thin wire and is spinning slowly at 5.4 rpm. What is the rotation rate after the bird lands
a person who weighs 641 n is riding a 94.0 n mountain bike. suppose the entire weight of the rider and bike is
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