Un electrón es extraído de un metal con una energía cinética de 1,8 eV. Si la función trabajo del metal es el 25% de la energía del fotón incidente, determine la función trabajo del material.

If this plastic cup is heated to its melting point, what will eventually happen to all the particles in the plastic? a. the particles will begin to move enough that they slide past each other. b. bonds will form and the liquid will become a solid. c. the spaces between the particles will get smaller. d. the particles will change state and become a crystalline solid.

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?