Which statements are true of all scientific endeavors? check all that apply.

all scientific endeavors are time consuming.
all scientific endeavors are expensive.
all scientific endeavors are supported by evidence.
all scientific endeavors are a systemic process.
all scientific endeavors involve observation.
all scientific endeavors involve experimentation.
all scientific endeavors involve the collection of information.

Two thin 80.0- cm rods are oriented at right angles to each other. each rod has one end at the origin of the coordinates, and one of them extends along the x- axis while the other extends along the yaxis. the rod along the x- axis carries a charge of - 15.0 μ c distributed uniformly along its length, and the other rod carries 15.0 μ c uniformly over its length. find the magnitude and direction of the net electrical force that these two rods exert on an electron located at the point (40.0 cm, 40.0 cm). (e

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final