In his first attempt, a long improve food from this spring board with a speed of 8m/s at 30°C tothe horizontal. He makes a secondattempt with the same speed at 45 °C to the horizabal . Given that the expression for the horizontal range of the projectile is U²sin²tintan/g where all the symbols have their usual meanings, show that he gain a distance of 0.8576m in his second attempt.

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?