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Water flows straight down from an open faucet. The cross-sectional area of the faucet is 1.2 × 10-4m2 and the speed of the water is 0.55 m/s as it leaves the faucet. Ignoring air resistance, find the cross-sectional area of the water stream at a point 0.12 m below the faucet.
an object is thrown from the top of a 45m building with an initial velocity of 20 ms straight upwards. the ball misses
A boy kicks a football with an initial velocity of 28.0 m/s at an angle of 30.0 degrees above the horizontal. What is the highest elevation reached by the football
A satellite with a mass of 310 kg moves in a circular orbit 3.00 multiply.gif 107 m above the Earth's surface. What is the gravitational force on the satellite
three equal point charges each with charge 1.95uc are placed at the vertices of an equilateral triangle whose sides
suppose the PASCO track is 120 cm long. Assume the track is frictionless, and suppose one end is lifted by 1.66 cm. Find the angle between the track and the horizontal
A flat sheet of ice (n = 1.309) has a thickness of 1.6cm. It is on top of a flat sheet of crystalline quartz (n = 1.544) that has a thickness of 0.86cm. Light strikes the ice perpendicularly and travels through it and then through the quartz. In t..
the wavenumber of the incident radiatin in a raman spectrometer is 20487 cm-1. what is the wavenumber of the scattered
The absorber surface of a solar collector is made of aluminum coated with black chrome a s = 0.87 and e ir = 0.09). Solar radiation is incident on the surface at the rate of 600 W/m2. The air and the effective sky temperature are 25 and 15°C respe..
A high-energy pulsed laser emits a 1.2-ns-longpulse of average power 1.7×1011W. Determine the rms value of the electric field
a solenoid of 200 turns carrying a current of 2 a has a length of 25 cm. what is the magnitude of the magnetic field at
find the wavelength of a particle of mass m and charge q accelerated through a potential difference v for the
A 9 m, 260-N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.5, and the ladder makes a 50° angle with the ground. How far up the ladder can an 800-N person climb before the ladd..
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