1. Julie sees commercials for antibacterial products that claim to kill almost all the bacteria in the area that has been treated with the product. Julie asks, 'How effective is antibacterial cleaner in
preventing the growth of bacteria?" She sets up an experiment in order to study the effectiveness
of antibacterial products. Julie hypothesizes that the antibacterial soap will prevent bacterial
growth. In her experiment, she follows the following procedure.

Identify the experimental variable and three control variables in the experiment.
DEPENDENT VARIABLE:
DEPENDENT VARIABLE:
3 CONTROLLED VARIABLES:

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

Which of the choices are parts of an atom? select all that apply. a.) compound b.) electron c.) neutron d.) molecule e.) photon f.) proton g.) element

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?