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A cylindrical tank is 50 ft deep, 39.5 ft in diameter, and filled up to the top with water. A flashlight shines into the tank from above. What minimum angle can its beam make with the water surface if the beam is to illuminate part of the bottom?
A bunch of grapes is placed in a spring scale at a supermarket. The grapes oscillate up and down with a period of 0.65 s, What is the mass of the grapes
A rifle with a weight of 35 N fires a 3.0-g bullet with a speed of 230 m/s. Find the recoil speed of the rifle
Two protons are moving directly toward one another. When they are very far apart, their initial speeds are 2.10 e 10^6 m/s. What is the distance of closest approach? Please show work in the answer because I am attempting to learn this.
In a double-slit interference experiment, the wavelength is ? = 622 nm, What is the linear distance between the 6th order maximum and the 2nd order maximum on the screen
A sample of ore containing radioactive strontium9038Sr has an activity of 7.6 x 105 Bq. How many grams of strontiumare in the sample
The hot glowing surfaces of stars emit energy in the form of electromagnetic radiation. It is a good approximation to assume e=1 for these surfaces. Find the radius of the star
A helicopter is ascending vertically with a speed of 9 m/s. At a height of 200 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach ground.
a boat has a mass of 6800 kg. its engines generate a drive force of 4400 n due west while the wind exerts a force of
What is this flux expressed as a fraction of the energy flux due to thermal re-radiation of absorbed solar energy. If radioactive decay were the only heat source for the Earth, what would the Earth's surface temperature be.
Using a map of the United States we find that Atlanta, GA is in a direction north of east from Dallas, TX. What is the displacement from Dallas to Chicago
A square wire loop with sides 0.1 m and a current of 10 A is placed in a magnetic field of magnitude 0.1 T. What is magnetic dipole moment of the loop
A u-tube with a cross-sectional area of 1.00 cm^2 is open to the atmosphere at both ends. WAter is poured into the tube until the water rises part way along the straight sides, What is the density of the oil
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