A hot air balloon rises vertically 100m. If it's resultant displacement is 145m SE, what is the horizontal displacement of the balloon and the angle the resultant makes with the ground?

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.

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

What is the relationship between wavelength of light and the quantity of energy per photon?