Use the periodic table to answer the question which statement correctly compares the number of protons and electrons in atoms of rubidium (rb) and calcium (ca)?
A. rubidium has more protons and fewer electrons than calcium
b. rubidium has more protons and more elctrons than calcium
c. rubudium has fewer protons and more electrons than calcium
d. rubidum has fewer protons and fewer electrons than calcium

Scout feels ill one day before school. her mother puts a thermometer in her mouth and the temperature begins to climb to 100°f. what is happening between the cooler thermometer and scout's body? a) scout's body is applying a force to the particles in the thermometer. b) kinetic energy is being transferred from her mouth to the thermometer. c) potential energy is being lost by the thermometer and gained by scout's body. d) the potential energy stored in foods is converted to mechanical energy to raise the mercury in the thermometer.

Aproduction line at v. j. sugumaran's machine shop has three stations. the first station can process a unit in 7 minutes. the second station has two identical machines, each of which can process a unit in 16 minutes (each unit only needs to be processed on one of the two machines). the third station can process a unit in 10 minutes. ▼ is the bottleneck station, with a bottleneck time of nothing minutes per unit (enter your response as a whole number).

Which of the following forces require physical contact? tension air resistance friction magnetic force applied force