If you were asked to describe metals and magnetism you could say that (2 points) a. all metals are attracted to magnets because they are able to create their own magnetic field. b. all metals are attracted by magnets; this is why we call metals ferromagnetic. c. only some metals are attracted to magnets because they do not have a magnetic field. d. only some metals are attracted by magnets; these metals are called ferromagnetic.

In 1995 a research group led by eric cornell and carl wiemann at the university of colorado successfully cooled rubidium atoms to the 20-200 nk temperature range. assuming (incorrectly) that the rubidium atoms behave liké particles of a classical ideal gas, calculate the rms speed of a rubidium atom at a temperature of 112.0 nk. in the experiments one particular isotope of rubidium was used, rubidium-87. the molar mass of this isotope is 86.91 q/mol. tries 0/20 submit answer

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.