Fill in the boxes and use a calculator to determine how long it would take each machine to travel 60 miles (in minutes). Use the speeds you previously calculated in miles per hour for each machine. Round answers to the nearest tenth (one decimal place). NASCAR car =

Thrust SSC car =

TGV Train =

Spirit of Australia Boat =

Lockheed SR71 Airplane =

More solar radiation is absorbed by earth’s surface than by

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.

Estimate the schwarzschild radius (in kilometers) for a mini-black hole formed when a superadvanced civilization decides to punish you (unfairly) by squeezing you until you become so small that you disappear inside your own event horizon. (assume that the your weight is 50 kg)