Problem 2 the james webb space telescope, the telescope that will replace the hubble, has a primary mirror that is concave with focal length with magnitude |f| = |131.4m|. what is the radius of curvature of the mirror with the correct sign? select one of the following: (a) 0m (b) +65.7m (c) −65.7m (d) +131.4m (e) −131.4m (f) +262.8m (g) −262.8m

Which of the following is an example of units for speed

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Amoving company collects data about couches they move and displays the data in a table. the force along the ramp, the angle of the ramp, and the height the couch is raised to are shown. which statements correctly compare the work done to move the couches? check all that apply. the same amount of work is done for couches 1 and 3. the same amount of work is done for couches 2 and 3. the work for couch 1 is greater than the work for couch 2. the work for couch 2 is less than the work for couch 3. the work for couch 3 is greater than the work for couch 1. the work for couch 2 is greater than the work for couch 1.