Who has done aqa combined science physics paper 2 2019 if you have send me pictures or tell me the questions
if you haven't don't reply please

Ascientific blank must be testable and capable of being proven false?

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?

Atoaster oven has a resistive heating element. the average rate at which it dissipates energy as thermal energy is 1.00 \(\rm kw\). in the united states, emf amplitude in household circuits is \(\mathcal e_{\max}\) = 170 \({\rm \; v}\) and the \(\rm ac\) oscillation rate is 60 \(\rm hz\). part a what is the root-mean-square current through the heating element?