Which of the following variations would increase the force experienced by the egg upon landing? select all that apply. a. change the surface from a box of foam to a hard floor b. decrease the mass of the egg c. increase the mass of the egg d. increase the drop height e. change the landing surface from a hard floor to a box of foam f. decrease the drop height i will give need asap

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

Which characteristics can be used to differentiate star systems? check all that apply.

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?