Một vật có khối lượng 100g được thả rơi tự do tùa độ cao 8m so với mặt đất. chọn mốc tính thế năng tại mặt đất. lấy g = 10m/s a) tính cơ năng của vật
b) tính độ cao và tốc độ của vật khi vật có động năng bằng ba thế năng
c) sau khi va chạm với mặt đất vật này nảy lên và chuyển động có độ cao cực đại là 3m tính phần trăm cơ năng bị mất khi va chạm

"an open tank has the shape of a right circular cone. the tank is 6 feet across the top and 5 feet high. how much work is done in emptying the tank by pumping the water over the top edge? note: the density of water is 62.4 lbs per cubic foot."

When temperature of a substance increases, of its particles increase resulting in more between particles. real world applications of thermal expansion absolute zero (-273 degrees c) is the lowest possible temperature on the kelvin scale. it is a measure of where a substance has no kinetic energy. heat is a process of the . energy flows spontaneously from a object to a until equilibrium is reached. heat is measured in heat is transferred throughis a method of heat transfer that occurs between particles of matter that are in direct contact with each other. are poor conductors that impede / reduce the rate of heat transfer. is a method of heat transfer that occurs in fluids (non-solids) by means of currents. real world application of convectiona method of heat transfer through electromagnetic waves. when energy moves from one object to another inside a closed system, no energy is or in the system in the transaction. systems will spontaneously move to a state of organized energy or high disorder over time called

What is the single most important equation in all of physics?