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Water flows through a horizontal pipe of cross-sectional are 10 cm2 at a pressure of 0.25 atm. The flow rate is 1.0 L/s. At a valve, the effective cross-sectional area of the pipe is reduced to 5.0 cm2. Find what is the pressure at the valve?
Light from a star has an intensity of about 75.5×10-8W/m2. how far away is it from Earth
A patient undergoing radiation therapy for cancer receives a 230-rad dose of radiation. Assuming the cancerous growth has a mass of 0.10kg , calculate how much energy it absorbs
Earth-Moon Center of Mass The Earth has a mass of 5.98×1024kg, the Moon has a mass of 7.35×1022kg, How far from the center of the Earth is the Earth-Moon center of mass
A bare helium nucleus has two positive charges and a mass of 6.64 multiplied by 10-27 kg. What voltage would be needed to obtain this energy
an electric field of intensity 3.7 knc is applied along the x-axis. calculate the electric flux through a rectangular
At t = 0, a 750 g mass at rest on the end of a horizontal spring (k = 125 N/m) is struck by a hammer, which gives the mass an initial speed of 2.76 m/s. Determine the position as a function of time
A boy with a mass of 55 kg is hanging from a spring with a spring constant of 240 N/m. With what frequency does the boy bounce up and down
Finally a thin rod of mass 7 kg is added between the two particles Since the particles are moving perpendicular to the line separating them, What the angular frequency of rotation of the rod + particles system
An elevator is able to raise 1,000 kilogram to a height of 20 meter in10 second. Calculate how much work does the elevator do
Discuss what it was about about blackbody radiation that classical physics was unable to explain. How did Planck's theory succeed?
Caught in an avalanche, a skier is fully submerged in flowingsnow of density 96kg/m^3. What percentage of the gravitational force on the skier
n = 3.59 mol of Hydrogen gas is initially at T = 386 K temperature and pi = 1.78×105 Pa pressure. How much work did the external force perform
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