A1 cm diameter hailstone falls through the atmosphere. neglecting the effects of viscosity and using estimates of relevant properties of ice (density nearly the same as water) and air . use scaling of the momentum equation to get an estimate of its terminal (steady state) velocity. would it hurt you if it hit you on the head?

Brutus, the dog, is pulling a bone to the left with a force of 20 n. lassie, another dog, is pulling a bone to the right with a force of 18n. what is the net force? a. b. c.

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

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.