What is the magnitude f of the average force exerted on the ball by the wall? express your answer in terms of variables given in the problem introduction and/or vix?

How do we measure or think of speed in the united states?

Which sound characteristic is not affected by the relative motion of an object

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.