What would happen if earth's axis of rotation were not tilted but instead were perfectly perpendicular to the plane of its orbit around the sun?

Which accounts for an increase in the temperature of a gas that is kept a constant volume

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?