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A uniform magnetic field, B=-20mT z^ acts on a -5.0nC charge with mass 1.0g travelling with velocity v=(-2,2, 1 )m/s.
a) What is the component of the velocity in the direction parallel to the magnetic field?
b) What is the component of the velocity perpendicular to the magnetic field?
c) The electron will travel in a spiral (also called a helix). Why? What is the direction of axis of the spiral? How far along the axis will the electron progress in the time it takes to make one loop of the spiral? (In other words, what is the pitch, p, of the spiral?)
d) Calculate the radius r of the trajectory.
A 3.0-kg block is traveling in the -x direction at 5.0 m/s, and a1.0-kg block is traveling in the +x diection at 3.0 m/s. (a)find the velocity Vcm of the center of mass.
A ball is thrown from a point 1.15 m above the ground. The initial velocity is 18.8 m/s at an angle of 31.2° above the horizontal. Find the maximum height of the ball above the ground
A person takes a trip, driving with a constant speed of 89.5km/h except for a 22.0-min rest stop. If the persons average speedis 77.8 km/h, evaluate how much time is spent on the trip
An electron in an in nite well of width a = 8 A transits from energy level n = 3 to n = 2 and emits a photon. Determine what is the wavelength of the photon? An electron in an in nite well of width a = 4 A is in the ground state (n = 1). What is the ..
Calculate the Reynolds number for 25C water flow in a 1-in nominal diameter sanitary pipe at 0.5 kg/s
the earth has an angular speed of 7.272middot10-5 rads in its rotation. find the new angular speed if an asteroid m
A charge of +8.00uc is placed at each corner of a square 1.00 m long on each side. Draw a map of the electric field around this square. Decide the magnitude and direction of the forces on each charge.
A column of soldiers, marching at 141 paces per minute, keep in step with the beat of a drummer at the head of the column, What is the approximate length of the column
A helium-neon laser emits light that has a wavelength of 632.8 nm. Estimate the diameter of the beam 14.0 km from the laser
For the circuit shown in the figure, calculate the current in the 2.00-Ω resistor and the potential difference between points a and b.
The rectangular coordinates of a point in the x-y plane are (??,??)=(2.75, -6.10). Draw this point and label the axes and the point appropriately. Then find the polar coordinates of this point. Convert (??,??)=(8.44mm, 23°) to Cartesian coordinat..
Shaving/makeup mirrors typically have one flat and one concave (magnifying) surface. What is the focal length of the mirror
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