19. The diagram shows a measuring cylinder. 100 .90 80 70 60 50 -40 -30 -20 10 Which unit would be most suitable for its scale? A mm2 B mm Ccm2 D cm3​

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?