Which of the following statements is true about the bohr model of the atom?
a. an electron orbits in spherical orbits at any distance from the nucleus.
b. an electron orbits in differently shaped orbits at discrete distances from the nucleus.
c. an electron orbits in spherical orbits at discrete distances from the nucleus.
d. an electron orbits in differently shaped orbits at random distances from the nucleus.

The radius of an atom is closest in size to a

Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?

What about a rubber band, can it change its shape? is it a solid?