Which microscope is used to see internal structures of cells in a natural state? darkfield microscope phase-contrast microscope two-photon microscopy confocal microscopy

1. explain how you calculate the net force in any direction on the box. 2. suppose an upward force of 15n is added to the box. what will be the net vertical force on the box? 3. what force could be applied to the box to make the net force in the horizontal direction zero? explain. 4. suppose a force of 25n to the right is added to the box. what will be the net force to the right?

During cooling, the kinetic energy of the molecules falls. why does this happen? a.the motion of the molecules increases. b. the motion of the molecules slows down. c.the van der waals forces between molecules decrease d. the forces of attraction between the molecules are overcome.

What is the acceleration rate of an object if the amount of force applied on the object is 75 newtons and the object has a mass of 15 kilogram?