What is the magnitude of the net gravitational force FgravFgravF_grav on the mass at xcxc due to the other two masses? Take the gravitational constant to be GGG = 6.67×10−11 N⋅m2/kg2N⋅m2/kg2 .

What is the relationship between the wavelength of a wave and it's energy?

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?

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?