In this engineering lab, you will build and test a device that releases and absorbs thermal energy in order to reach a goal. Don't forget what you learned about repeated trials. You will need to repeat tests of your device to make sure it does not need to be redesigned or improved. Use the Thermal Energy and Chemical Change Lab Report to record your observations and test measurements. You will submit your completed report. Be sure to review the grading rubric before you begin. Thermal Energy Engineering Building Criteria and Limitations You must have at least one steam engine and one cargo box in your train design. Everything else is up to you—build items across, or stack items on top of each other. The train track will have two hills and spaces where the track is missing. Consider these limitations when designing your train. Make sure you note these criteria and limitations in your lab worksheet. Before you test your trains, plan at least three train designs. Add these design descri

as university of miami psychologists debra lieberman and adam smith pointed out in a recent article in the journal current directions in psychological science, humans have social and psychological mechanisms to deter incest. with very few exceptions, marriages between brothers and sisters and between parents and their children are verboten in every human culture. the primary psychological anti-incest mechanism is the yuck response. even the idea of sex with their mom or dad, bro or sis is upsetting to most people. the psychologist jonathan haidt has found that nearly everyone is repelled by the prospect of brother-sister sex, even in hypothetical situations in which there is no chance of pregnancy).

the biological cost of incest

this raises an interesting question: just what’s so bad about incest? sure, having sex with your dad or your sister seems gross — but why? some anthropologists have argued that incest taboos are learned social conventions. this explanation, however, doesn’t make sense to me as it does not explain the widespread existence of anti-incest mechanisms in creatures ranging from cockroaches to chimpanzees. second, the incest taboo is about as close to a universal law as human moral rules get.

why should mechanisms to avoid incest be so widespread both in nature and across human societies? the answer is simple. the problem with having sex close with relatives is that there is an astonishingly high chance that your offspring will be born with a serious birth defect.

i took very good i wish you luck! i hope it .

the answer is: c. c.it limited the president’s power to start wars.

the war powers resolution of 1973 requires the president to notify the congress whenever the president wanted to order a military operation to other countries within 48 hours. if after being reviewed the congress disagree with the proposal, that the president will be banned from ordering the operation.

the answer is d. amendments.