The ball is dropped from a certain height and is falling to the ground. If its acceleration is a constant 9.8 meters per second squared, how many seconds would it have dropped when the velocity is 49.0 m/s ? A. 4.9 secs
B. 4 secs
C. 5 secs
D. 9.8 secs

Which of the following is not a part of a wave? question 2 options: a: frequency b: refraction c: wavelength d: amplitude (whoever answers correctly first gets brainiest! ) ~kayla

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays