Which choice describes how energy is transferred at the particle level through the process of conduction?

a. the fast-moving particles in the colder material collide with the slow-moving particles in the hotter object. the collisions transfer energy from the fast-moving particles to the slow-moving particles, increasing their speed and thermal energy.

b. the fast-moving particles in the hotter material collide with the slow-moving particles in the colder object. the collisions transfer energy from the fast-moving particles to the slow-moving particles, increasing their speed and thermal energy.

c. the fast-moving particles in the colder material move into the hotter material. the slow-moving particles in the hotter material move into the colder material. the two materials switch temperatures.

d. the fast-moving particles in the hotter material move into the colder material. the slow-moving particles in the colder material move into the hotter material. the two materials switch temperatures.

The answer is B. Because the two materials will not switch temperature, heat is only transferred from a hotter material to a colder material to achieve equilibrium in temperature. Thus, option C and D is out. Option A is also wrong because the faster moving particles should be in the hotter material not the colder material, this is because when the material is hot, the kinetic energy of the particles increase, causing it to move faster.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

as we probably am aware that our atmosphere or air have various levels, each level has different gasses, and each gas has another porousness. at the point when the light originates from lower porousness to higher penetrability, it alters its course. with the goal that implies that when the light originates from the moon to the earth, it alters it's course a lot more occasions. it essentially implies that the state of the light piece of the moon is changed on the earth.

not copied too! hope this !

joke:

h o h o hope you have a merry christmas!