ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements. An object is dropped from a platform 400 ft high. Ignoring wind resistance, what will its speed be when it reaches the ground?

7800 ft/s
12,800 ft/s
160 ft/s
89 ft/s

Match the atomic particles with their characteristics. 1. made of two protons and two neutrons neutron 2. similar to an electron; positive charge neutrino 3. orbits nucleus; negative charge positron 4. bundle of energy; zero charge proton 5. found in nucleus; positive charge meson 6. very unstable; +, -, or zero charge gamma 7. found in nucleus; zero charge electron 8. negative particle; negative charge beta 9. atomic energy converted to mass alpha

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

What is the stall speed at sea level of an airplane that weights 10000 lbs., has a wing area of 300ft^2, and a maximum lift coefficient of 1.4? what is the stall speed if flaps that double cl, max are applied?