WHICH OF THESE ARE NOT MECHANICAL WAVES AND CAN BE USED TO SEND A SIGNALS TO SATELLITES ORBITING THE EARTH? A. SOUND WAVES
B. RADIO WAVES
C. BOTH SOUND WAVES AND RADIO WAVES
D. NEITHER SOUND WAVES OR RADIO WAVES
IF ANYONE I KNOW SEES THIS I WAS NEVER HERE

Acommercial passenger jet can travel up to 970 km/hr at an altitude of 30,000 feet. at this speed, how long will it take the jet to travel 1,865 kilometers? a. 2.3 hrs b. 1.9 hrs c. 1.7 hrs d. 1.5 hrs

How do you tell if someone actually cares about you? and just say they do?

What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.