In a hydrogen atom in its ground state, the electron is on average a distance of about 1×10-10 m from the proton. what is the magnitude of the electric field due to the proton a distance of 0.9 ✕ 10-10 m away?

What statements accurately describe atoms

A2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kn. what is the frequency of the fundamental mode of vibration of this wire?

Suppose the house in question 3 is located in cleveland where the annual average solar flux is 160 w/m2 . if 10 m2 of solar panels operating at 20 percent efficiency were installed on this house to collect and store solar energy in the form of hot water: