Sunlight can raise the inside temperature of a real doghouse. which of the following changes to a real doghouse would result in warmer inside temperatures due to sunlight? a) covering the doghouse roof with a shiny metal material b) making the doghouse roof thicker with the same material c) adding a air vent to the middle of the doghouse roof d) changing the doghouse roof from a light color to a dark color

"an open tank has the shape of a right circular cone. the tank is 6 feet across the top and 5 feet high. how much work is done in emptying the tank by pumping the water over the top edge? note: the density of water is 62.4 lbs per cubic foot."

1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct