Which statements are part of the safety protocol for this lab experiment? check all that apply. always wear safety goggles when performing an experiment. use caution when releasing the cars, being careful not add additional force. ramps should be equipped with an incline as well as a decline for balance. ensure that the track has enough room and will not interfere with others in your class. gloves should be worn to protect your hands when catching cars at the base of the track. report all accidents to the teacher. ( the answers are a, b,d, and f)

What does si stand for,when referring to a system of measurement

Smallest intensity of a stimulus that you can detect 50 percent of the time is

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.)