a 200kg object and 500kg object are separated by 4m(a)find the net gravitational force exerted by these objects on 50kg placed midway between them (b) at what position can50kg object placed so as to experience anet force of zero from the other two object?

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red. b) the pollen grains will be pure blue. c) the pollen grains will have red interiors and blue exteriors. d) the pollen grains will have blue interiors and red exteriors.

Hybrid instruments that play sounds that are part sampled and part synthesized are known as:

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above