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you hear a sonic boom of a high speed jet plane exactly 2.90 s after it passes directly overhead in level flight. At the time you hear the boom, you see the plane at an angle of 20 degrees above the horizon. assume the speed of sound at the altitude of the plane is 325 m/s. how fast is the plane traveling? what is the altitude of the plane?
A 0.30 kg mass is suspended on a string. In equilibrium the mass stretches the spring 2.0 cm downward. Calculate the total energy of the system
What percentage of a photon beam would interact in passing through a 3-mm slice of absorber if the linear attenuation coefficient were 0.15/cm
A person with a near-point distance of 32 cm is able to get a usable magnification of 12 with a particular magnifying glass. What is the friend's near-point distance
A closely wound circular coil with a diameter of 4.00cm has 600 turns and carries a current of 0.500 A. What is the magnetic field at the center of the coil?
Air conditioners are rated by their coefficient of performance at 76^\circ{\rm F} inside temperature and 92^\circ{\rm F} outside temperature. What is the maximum possible coefficient of performance
A fish in a flat-sided aquarium sees a can of fish food on the counter. What is the actual distance between the can and the aquarium
A charge Q1 = 1.33 %u03BCC is at rest and is located 2.30 cm away from another fixed charge Q2 = 1.95 %u03BCC. Calculate the kinetic energy of charge Q1
On a frictionless surface, a 3-kilogram cart moves at a velocity of 2 meters per second west, What is this slower speed
A certain light-bulb has a tungsten filament. It has a power of 100 W when attached to 120 V potential difference. Calculate the resistance of the filament
An object, mass 1.48 kg, moves in a horizontal circle with a radius of 1.52m. The object has an intial velocity of 28.0 m s-1. If the kinetic coefficient of friction between object and surface is 0.382.
Calculate the force of gravity on a 69.29-kg mass at the Earth's surface. The mass of the Earth is 6E24 kg, and the its radius is 6.4E6 m. ( 6E24 kg can also be written as 6 X 1024 kg.)
An electric field of 8.55x10^5 V/m is desired between two parallel plates, each of area 35.00 cm^2 and separated by 2.45mm of air. What charge should be on each plate.
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