Suppose you wanted to start a fire using a mirror to focus sunlight. which of the following statements is most accurate? a. it would be best to use a concave mirror, with the object to be ignited positioned at the center of curvature of the mirror. b. it would be best to use a concave mirror, with the object to be ignited positioned halfway between the mirror and its center of curvature.

Laboratory experiments, observational field studies, and model-building are all examples of different forms of scientific investigations.  in what way do laboratory experiments primarily differ from other forms of scientific investigations?   a.  a laboratory experiment is the only accepted form of investigation within the scientific community.  b.  studies about how things behave in nature or studies involving very large objects are best answered through laboratory experiments.  c.  laboratory experiments involve the identification and control of variables.  d.  data can only be generated through laboratory experiments, not other forms of investigation.

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

Which of the following is the best name for mgcl2