Walter and Luis Alvarez hypothesized that an asteroid impact caused the formation of a level 66-million-year-old layer of clay containing high levels of iridium. What evidence did they look for?

Running and sleep. sufficient sleep is important for adolescents for both their neural and psychological development. despite this, daytıme sleepiness and poor physical and psychological functioning related to chronic sleep disturbances are common. there is a growing body of evidence that exercise is associated with both better sleep and improved psychological functioning sixty participants were recruited from a high school in northwesten switzerlandthey were randomly assigned to either a running group or a control group, 30 to each group the running group ran every moming for a little over 30 minutes on weekdays for a three-week period. all participants used a sleep log for subjective evaluation of sleep, and sleep was also objectively assessed at the beginning and end of the study using a sleep electroencephalographic device that measured quantities such as sleep efficiency and time spent in the four different sleep phases. running was found to have a positive impact on both objective and subjective measures of sleep functioning what are the explanatory variable(s) and the response variable(s)? (a) outline the design of the experiment (b) (c) here are some more details on the treatment and control groups. all participants arrived at school at 7 a.m., and the running group did two laps on the track and then ran cross countrv in groups of at least four people for 30 minutes the control group remained seated at the track, worked on horpework. and interacted with each other. when the runners returned, all participants prepared for school and ate a breaktast that was provided. iwhy do you think the experimenters had the control group arrive at 7 am interact withdassmates and have breaktast together? explain. do you think having the control eroup do these activities is important for the types of conclusion that can be reached? how?

Eter lives in a beautiful region. peter and other residents of his region use water from the river that flows through their region. recently, mark industries decided to set up their chemical plant near that river. peter realized that the waste from the chemical plant would pollute the river. he decided to seek a legal ordinance that would restrict the use of land near that river for specific use only. which type of zoning will peter and his region?

The following legal claims exist for m. finger co. identify the accounting treatment for each claim as either (a) a liability that is recorded or (b) an item described in notes to its financial statements. 1. m. finger (defendant) estimates that a pending lawsuit could result in damages of $1,250,000; it is reasonably possible that the plaintiff will win the case. an item described in notes to its financial statements. a liability that is recorded. 2. m. finger faces a probable loss on a pending lawsuit; the amount is not reasonably estimable. a liability that is recorded. an item described in notes to its financial statements. 3. m. finger estimates damages in a case at $3,500,000 with a high probability of losing the case. an item described in notes to its financial statements. a liability that is recorded. the amount that m. finger co. should record in its accounting records related to these suits is: