The Stanford Linear Accelerator (SLAC) is 3.2 km long and can accelerate electrons up to 50 GeV. Assume the electrons experience a constant force during the acceleration. What fraction of the energy used to accelerate an electron is lost to radiation?

Galileo was the first to notice that the moon has craters, valleys, and mountains. how might this have changed people's perception of the moon at the time?

Which changes of state do the labels represent? a: b: c:

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.