You are conducting preliminary research for an energy company and your job is to compare nuclear energy and solar energy. You need to calculate how many solar panels will be needed (and the total area they will occupy) to substitute 1 kg of nuclear fuel. Here is what you know so far: when 235 g of pure uranium reacts in a nuclear reactor, the mass loss is 0.00846 g. 1 kg of nuclear fuel contains 5% pure U-235. Each solar panel produces 5000W, the solar irradiance in the region is 220 W/m2 with an availability of 5 hr per day, and the efficiency of the solar panels is 25%.

Modify the equation fδt=δ (mv) to find the force of friction.

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

If a rock is thrown upward on the planet mars with a velocity of 12 m/s, its height (in meters) after t seconds is given by h = 12t − 1.86t2. (a) find the velocity of the rock after two seconds. m/s (b) find the velocity of the rock when t = a. 12−3.72a m/s (c) when will the rock hit the surface? (round your answer to one decimal place.) t = s (d) with what velocity will the rock hit the surface? m/s