A 10kg object rests on a frictionless surface when it is struck by a 300N force. At what rate will it accelerate? 3m/s/s
30m/s/s
0.3m/s/s
300m/s/s

Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon

Which notation is used to represent an alpha particle? a. b. c. d.