Which statement is a result of a substance melting. a) the attractions between the particles are stronger. b) the average kinetic energy of the particles decreases. c) the particles form a rigid structure where the atoms vibrate. d) the particles are attracted to each other but are fluid and slide past one another.

the answer is D) on usatestprep

D) The particles are attracted to each other but are fluid and slide past one another.

Explanation: During melting, The attractions between the particles weaken. Solids have rigid structures where atoms vibrate. Melting weakens the attractions between particles. The average kinetic energy of the particles increase after a substance has melted.

speed

ratio of distance traveled to time interval

net force

vector sum of forces on object

object

source of diverging light rays either luminous or illuminated

don't remove my answer im trying my best to answer them

explanation:

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west