GIVING BRAINLIST; 3 of your friends are all sitting on one end of a seesaw. The combined weight is 350 lbs. The length from the fulcrum to your friends is 2.5 meters. The rest of the seesaw (From the Fulcrum to you) is 4.5 meters. Sketch and correctly annotate the known and unknown variables. What is the IMA?

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.