Astar with the same mass and diameter as our sun rotates about a central axis with a period of 28.8 days. suppose that this star runs out of nuclear fuel and collapses to form a white dwarf star with a diameter equal to that of the earth. assume the star acts like a solid sphere, that there is no loss of mass in the process, and that the star has no external torques acting on it. as gravity causes the star to contract, gravitational potential energy is converted to rotational kinetic energy, so kinetic energy is not conserved. the radius of the sun is 6.96×108 m, and the radius of the earth is 6.37×106 m. (a) what would be the rotation period of the new white dwarf

Complete the statement about memory improvement. ( )involves organizing and breaking down information into easier groups to expand capacity. rehearsal is the verbal repetition of information. these techniques are especially important for the improvement of ( ) memory.

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

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value