A .3 kg air hockey puck moving 3.33 m/s northwest hits an identical puck moving south at 1.87 m/s. The first puck ends up going 2.10 m/s west. What is the x-component of the final velocity of the second puck?

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

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.