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Define in qualitative terms what string theory is trying to do, and why physicists are motivated to work on it.
Explain what the bulk in string theory? Describe how this concept might account for something that we do not understand about the strength of gravity relative to that of the other three fundamental forces.
A 19 kg crate is at rest on alevel surface. If the coefficient of static friction between thecrate and the surface is 0.48, what horizontal force is required to get the crate moving? In N.
The index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), what is the angle of refraction for each wavelength
What is the Reynolds number for the fastest falling ball in the experiment. Use the same data as in problem 1, glycerin density of 1.30 g/cm^3
A roller-coaster car has a mass of 504 kg when fully loaded with passengers Point B of the rollercoaster has a radius of 15.0m, What is the maximum speed the vehicle can have
q1. a 3.72 g bullet moving at 290 ms enters and stops in an initially stationary 3.30 kg wooden block on a horizontal
an astronaut is connected to her spacecraft by a 35-m-long tether cord as she and the spacecraft orbit earth in a
A coil copper wire has aresistance of 10.0 ohms and a coil of silver has a resistance of10.1 ohlm both at 0degrees celsius. At what temperature wouldthe resistance of the coils be equal
A spherical source radiates sound uniformly in all directions. At a distance of 13 m, the sound intensity level is 80 dB. What power is radiated by this source
A 200 resistor has a current of 1.5A running through it and is connected in series with a 300 resistor. what is the emf of the battery to which the resistors are connected?
An unloaded Hummer has a standard ground clearance of 40cm, and an unloaded mass of 2000kg. What is the total mass of the hummer
Two thin lenses with a focal length of magnitude 15.0cm , the first diverging and the second converging, are located 11.3cm apart. How far from this first lens is the final image formed
A ball has a diameter of 3.9 cm and average density of 0.0839 g/cm3. What force is required to hold it completely submerged under water
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