4, Find the resultant of three concurrent forces of 8 N, 12 N and 16 N acting at respective angles 30°, 60° and 90° relative to the +x-direction.
A. 43.0 N, 067°
B.-36.0 N, 180°
C. 30.4 N, 090°
D. 43.0 N, 247°​

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?

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

What is the increase in density of a medium due to wave travel?