Which type of wave does not have a crest?
a. a transverse wave
b. an oscillating wave
c. a longitudinal wave
d. an electromagnetic wave

Write a full page that sumerizes thermodynamics it’s from the website visionlearnig

Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.

An element becomes a positively charged ion when itloses protons.loses electrons.gains electrons.gains neutrons.