Health risks and benefits of physical fitness?

What are segments of dna that code for a particular trait. a combination of dna and proteins make up what

When you turn on a battery-operated device, an electrical circuit is

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.