An electron with kinetic energy E = 3.60 eV is incident on a barrier of width L = 0.190 nm and height U = 10.0 eV.

(a) What is the probability that the electron tunnels through the barrier? (Use 9.11 x 10Plugin insertion failed: Plugin failed kg for the mass of an electron, 1.055 x 10Plugin insertion failed: Plugin failed JPlugin insertion failed: Plugin faileds for h bar, and note that there are 1.60 x 10Plugin insertion failed: Plugin failed J per eV.)
(b) What is the probability that the electron is reflected?

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

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)