19) Which answer choice CORRECTLY describes each picture of the levels of organization of this green plant? A) P: tissue, Q: organ, R: organ system, S. cell
B) Porgan system. O cell, R:organS tissue
P: organ. Q: tissue, R: organ system, S: cell
D) P. cell. Q: organ, R: organ system, S:tissue

Wo audio speakers are placed on a vertical rail. speaker a is placed at head-level while speaker b is place at some variable height, \delta yδy, above speaker a. both speakers receive simultaneous input from a sine-wave generator so the speakers each produce a pure sinusoidal sound wave with a wavelength of 0.531 meters. calculate the lowest height that speaker b can be placed above speaker a to produce a minimum of sound heard by person standing \delta x = 7.86δx=7.86 meters directly in front of speaker a.

Lin yao looks at the back of a spoon. how should she describe her reflection? upside down and smaller upside down and larger right-side up and smaller right-side up and larger

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?