Answer the following questions. 1. why would it be difficult to recycle polyvinyl chloride into plastic bags? 2. why is hdpe a good material for boats? 3. which plastic do you think could best contain extremely corrosive material? why? 4. list two uses of high density polyethylene other than those listed in the table. 5. two plastics that are targeted for recycling from household waste are polyethylene terephthalate and high density polyethylene . one of the problems of recycling such materials is separating them. suppose you have been hired to set up a process for separating large quantities of waste plast.

The population of bacteria in a petri dish doubles every 40 seconds. the population of the bacteria is initially 400 organisms. what unit is most appropriate for the time at which the number of bacteria is 300? hour bacteria per hour second bacteria per second

Biology 1c cumulative exam i need awsners

Consider the motion of the balloon and its air contents in terms of momentum. in step 1 above, the total momentum of the balloon and its contents was zero. recall that momentum = mv. both the balloon and the air inside it had a velocity of zero and therefore the total momentum was zero. now think about what happened when the air escaped from the balloon. a certain mass of air accelerated in one direction. in order to keep the total momentum of the system zero, the balloon itself (which has mass) had to accelerate in the opposite direction. use this scenario to you explain why the soda can rotates when the water squirts out of the escape holes. what was your hypothesis concerning the water-filled can? according to your data, do you think your hypothesis was correct? (be sure to refer to your data when answering this question.) summarize any difficulties or problems you had in performing the experiment that might have affected the results. describe how you might change the procedure to avoid these problems. give at least one more example of newton's third law in everyday life.