What type of modulation is typically used by broadcasting stations to transmit pictures on television screens?

Natural forces that can alter ecosystems include seasons and climate changes. t or f

Two friends are having a conversation. anna says a satellite in orbit is in freefall because the satellite keeps falling toward earth. tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . who do you agree with and why?

Diamond will scratch quartz. true or false