Physics Paper 1 Aqa Already Passed

what is the live wire connected to {Ans: fuse}current {Ans: A flow of electric charge.}disadvantages of hydroelectric power {Ans: environmental impacts from flooding the valley - rotting vegetation releases methane and CO2 - possible loss of habitat high initial costs}method for finding the density of irregular objects {Ans: find the mass of the object using a balance fill a eureka can with water, just under the spout place a measuring cylinder under the spout of the can place the object in the water -> this causes the water to be displaced and flow out of the can through the spout measure the volume of the water displaced in the measuring cylinder -> this is the same volume as the object using the mass and volume calculate the density}3 things the alpha particles did in the alpha-scattering experiment {Ans: 1) most of the alpha particles went straight through the foil WITHOUT changing direction 2) sometimes an alpha particle was deflected ( it changed direction as it passed through the foil) 3) sometimes an alpha particle had bounced back off of the foil.}one way to decrease thermal conductivity through roof {Ans: loft insulation}