An electron of kinetic energy of 2.50 kev enters into the region with a uniform magnetic field of 9.66 × 10-4 t, with the angle of θ = 20°.
considering the information given above, answer parts a, b, c, and d below. show all work. include your explanation and show your calculation in detail.
find the speed of the electron.
estimate the radius of the circular motion of this electron.
obtain the period of the circular motion of this electron.
calculate the pitich of the motion.

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

In this thread, i would like you to comment on the nature of light and how operation of telescopes. light has a duality of a particle and a wave; which one affects your life? also how does light interact with optics inside telescopic systems? answer these questions in two paragraphs. then respond the another students response.