At what speed must the electron revolve round the nucleus of the hydrogen in its ground state in order that it may not be pulled into the
nucleus by electrostatic attraction

Aseries circuit consists of a resistor with r = 20 ? , a capacitor with c = 0.01 f, and a decaying battery with e = 300e? 5t. if the initial charge is 0, find the charge as a function of time t

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?