A particular type of fundamental particle decays by transforming into an electron e− and a positron e+. Suppose the decaying particle is at rest in a uniform magnetic field B of magnitude 3.53 mT and the e− and e+ move away from the decay point in paths lying in a plane perpendicular to B
How long after the decay do the e− and e+ collide?

If jesus walked on water, does that mean he swims on land

What happens when the vapor pressure of a liquid is equal to the external pressure?

Aspring with an unstrained length of 0.071 m and a spring constant of 2.6 n/m hangs vertically downward from the ceiling. a uniform electric field directed vertically upward fills the region containing the spring. a sphere with a mass of 5.29 10-3 kg and a net charge of +7.2 µc is attached to the lower end of the spring. the spring is released slowly, until it reaches equilibrium. the equilibrium length of the spring is 0.058 m. what is the magnitude of the external electric field?