The diagram above is a soil profile. it represents different soil layers and the parent material from which the soil forms. the topsoil layer is at or near the surface, and the parent material can be several meters below the surface.

porosity is one of many characteristics that varies in soil. porosity is a measure of how much empty space a soil sample has between its particles—the more empty space there is, the greater the porosity.

given that particles deeper underground tend to pack more closely together due to gravity, place the soil layers in order of increasing porosity.

a. c horizon → subsoil → topsoil

b. topsoil → c horizon → subsoil

c. topsoil → subsoil → c horizon

Bernie drove home from a vacation in 1.5 hours. he traveled a total distance of 60 miles. what was his average speed in miles per hour? a. 60 mph b. 90 mph c. 40 mph d. 55mph

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)

Una carga puntual de 3 x 10-6 c se coloca a 12 cm de una segunda carga puntual de - 1,5 x 10-6 c. calcular la magnitud fuerza eléctrica entre las cargas