The pitch of a sound is how high or low it is. The higher the frequency of a sound wave is, the higher its pitch. Each of the waves below represents a sound wave. Put the waves in order from lowest to highest pitch

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.

Ivana walks 2km north then turns around and walks 3km south