Two rocks are moving through empty space in a straight line at the same speed. one has a mass of 10 kg, the other has a mass of 50 kg. which statement about the rocks is true? a. both will be stopped by the same amount of force acting against them. b. the one with less mass takes more force to stop. c. the one with greater mass takes more force to stop. d. both will stop on their own without any force acting on them.

Properties seen when one one substance changes to another are known as properties

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?

You are still fascinated by the process of inkjet printing, as described in the opening storyline for this chapter. you convince your father to take you to his manufacturing facility to see the machines that print expiration dates on eggs. you strike up a conversation with the technician operating the machine. he tells you that the ink drops are created using a piezoelectric crystal, acoustic waves, and the plateau-rayleigh instability, which creates uniform drops of mass m = 1.25 ✕ 10−8 g. while you don't understand the fancy words, you do recognize mass! the technician also tells you that the drops are charged to a controllable value of q and then projected vertically downward between parallel deflecting plates at a constant terminal speed of 20.0 m/s. the plates are ℓ = 2.15 cm long and have a uniform electric field of magnitude e = 6.40 ✕ 104 n/c between them. noting your interest in the process, the technician asks you, "if the position on the egg at which the drop is to be deposited requires that its deflection at the bottom end of the plates be 0.17 mm, what is the required charge on the drop (in c)? " you quickly get to work to find the answer. (neglect the force of gravity.)