You toss a ball at 30 m/s straight upwards. How much time will take the ball to reach the top of its path?​

Heat from the sun reaches earth to a. radiation b. convection c. conduction

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical