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An electron moves with speed 700 m/s. Entered uniform E and B field on straight path. E points down and into page. E B and v are perpendicular. Calculate the magnitude of electric field?
In soccer, a speed record was set for kicking a soccer ball at 43m/s. If the soccer player kicked the ball from ground level at an angle of 30° from the horizontal, what would be the flight time of the soccer ball? Assume that air resistance is ne..
An electron of mass, m, collides with an atom of mass M. The atom is initially at rest, What is the minimum speed of the electron in order to excite the atom
An open-pit coal mine consumes 96 hectares of land, down to the depth of 26 m, each year. What volume of earth, in cubic kilometres, is removed in this time.
Determine the new planets mass density to earth mass density
Let us use the uncertainty principle to (very roughly) estimate the size of a hydro- gen atom. Picture the hydrogen atom as an electron orbiting a proton at close to the speed of light.
A 7.5cm diameter circular loop of wire is in a 0.76T magnetic field. The loop is removed from the field in 0.21s, What is the average induced emf
Light of a wavelength 450 nm is incident on a sodium emitter in a photoelectric effect apparatus. What is the cutoff frequency for the emitter
Let be the magnitude of the kinetic energy of puck A at the instant it reaches the finish line. Likewise, is the magnitude of the kinetic energy of puck B at the (possibly different) instant it reaches the finish line.
Jupiter has mass M, radius R and orbital period T, while the Sun has mass m, radius r and orbital period t. Calculate the ratio of the centrifugal acceleration to the gravitational acceleration at the equator of
find static friction between the chair and the floor.
calculate the fraction of which is submerged when the cylinder floats in alcohol. Fraction of Vwood submerged.
A model rocket is launched straight upward. Its altitude y as a function of time is given by y = bt -ct2, where b = 82 m/s, c = 4.9 m/s2, t is the time in seconds, and y is in meters, (a) make use of differentiation to find out a general expressio..
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