4. A plane travels 100 km north in 2.5 hours. What is the plane's velocity, in km/hr?

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

Decreased sensitivity to an unchanging stimulus is known as

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