two batteries of 7 volt and 13 volt and internal resistance 1 ohm and 2 ohm respectively are connected in parallel with the resistance of 12 ohm find the current through each branch of circuit and the potential difference across 12 ohm resistance

Which type of electromagnetic waves are dangerous enough to be used to kill cancerous cells? (a)gamma rays (b)visible light (c)infrared light (d)microwaves

Why should seat belts not be mandatory quick plz

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.