An electron is accelerated from rest through a potential difference of 3750 V. It enters a region where the magnetic field is 4.0 mT perpendicular to the velocity of the electron. Calculate the radius of the path this electron will follow
A) 1.2 cm
B) 2.2 cm
C) 3.2 cm
D) 4.2 cm
E) 5.2 cm
E
You might also like to view...
A ball bearing rolls along a smooth horizontal tabletop, and crashes head-on into a second ball bearing of half its mass. If both ball bearings roll in the x-direction only (either positive or negative) and the initially stationary ball bearing is observed to have a velocity of +2.4 m/s after the collision, what was the initial speed of the first ball bearing?
A. More information is required B. 7.2 m/s C. 3.6 m/s D. 1.8 m/s
A rod, with sides insulated to prevent heat loss, has one end immersed in boiling water 100°C and the other end in a water-ice mixture at 0.00°C
The rod has uniform cross-sectional area of and length of Under steady state conditions, the heat conducted by the rod melts the ice at a rate of every 34 seconds. What is the thermal conductivity of the rod? (The heat of fusion of water is What will be an ideal response?
By studying distant galaxies in the 1920s, Hubble made the following important discovery that led us to conclude that the universe is expanding
A) All galaxies contain billions of stars, and all galaxies have spiral shapes. B) All galaxies outside the Local Group are moving away from us, and the farther away they are, the faster they're going. C) All galaxies were born at the same time, and all will die at the same time. D) All galaxies outside the Local Group are orbiting the Local Group. E) All galaxies outside the Local Group are moving away from us, and all are moving away at nearly the same speed.
The Moon lacks an atmosphere because its surface gravity is only ________ the Earth's
Fill in the blank(s) with correct word