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Give two examples where using conservation of energy to solve a problem is easier than the methods you learned earlier in the course. Explain how you would use energy to solve the problem and why it easier.
An electron drops from the L shell to the K shell and givesoff an X-ray with a wavelength of 0.0200 nm. What is the atomic number of this atom
A fisherman's scale stretches 4.0cm when a 2.3kg fish hangs from it. What is the spring stiffness constant
In a museum exhibit, three equal weights are hung with identical wires. Each wire can support a tension of no more than 72.0N without breaking. Under these conditions, what is the tension in the middle wire
light of wavelength 696 nm is incident on a single slit. the central bright fringe is 2.64 cm wide on a flat screen
A positive charge of 0.900? C is located in a uniform field of 1.05×105 N/C. How close are the two charges
A block of aluminum with mass 10.0 g absorbs 176 calories of heat energy as it is heated from 20.0 oC to 100. oC. How much heat does the aluminum release
Can someone describe to me what the KKLT paper says, and what has and hasn't it achieved regarding the ability to construct solutions with a small positive or negative cosmological constant in string theory?
Calculate the smallest number of whole logs (density, p, = 725kg/m3, radius = 0.0800 m, length = 3.00 m) that can be used to create a raft that will carry four persons
A positron is a particle of "antimatter"; it has the same mass as an electron (9e-31 kg), but its charge is positive instead of negative. At research facilities such as Cornell Electron Positron Storage Ring at Cornell University in New York, high..
The mass of the airplane is m = 9010 kg. The plane travels at a constant speed around a circular path of radius R = 8.67 miles, What is the magnitude of the lift force acting on the plane
All of the electrical outlets in a room are connected in a single parallel circuit. The circuit is equipped with a 20 A fuse, and the voltage is V = 220 V. (a) What is the maximum total power that can be supplied by the outlets without blowing the ..
A 6.1 kg physics book is sitting on the table with no external forces acting upon it other than gravity and the table. What is the force of friction on the book?
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