The peak of intensity of our sun on a black body curve would be in which of the following wavelength ranges

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.

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? ?