PLEASE SHOW WORK AND ANSWER WELL A 2.0 kg block rests on a level surface. The coefficient of static friction is , and the coefficient of kinetic friction is A horizontal force, "F", is applied to the block. As "F" is increased, the block begins moving. Describe how the force of friction varies as "F" increases from the moment the block is at rest to when it begins moving. Indicate how you could determine the force of friction at each value of "F"―before the block starts moving, at the point it starts moving, and after it is moving. Show your work.

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?