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Several otter species live in cold waters and have high metabolic rates to help keep them warm. Eurasian otters must eat 15% of their body weight each day, and sea otters 20 to 25%, depending on the temperature. In water as warm as 10 °C (50 °F), an otter needs to catch 100 g (3.5 oz) of fish per hour to survive.
The Carnegie rule is a rule of thumb suggesting how much outside-of-classroom study time is required to succeed in an average higher education course in the U.S. system. Typically, the Carnegie Rule is reported as two or more hours of outside work required for each hour spent in the classroom. [1]
Use of this format was continued for the Science packet in the 2012–2013 season. [27] The events are split up into two groups: the seven objective tests (art, economics, language and literature, math, music, science and social science) the three subjective events (essay, interview and speech). In addition, there is a Super Quiz relay event.
The science behind this; according to Jost's Law from 1897 “If two associations are of equal strength but of different age, a new repetition has a greater value for the older one”. [25] This means that if a person were to study two things once, at different times, the one studied most recently will be easier to recall. [26]
Rosa was adopted by the Monterey Bay Aquarium in 1999 and served as surrogate mother for a record 15 otters. She outlived the life expectancy for wild southern sea otters.
Furthermore, sea otters will use large stones to pry an abalone off its rock; they will hammer the abalone shell with observed rates of 45 blows in 15 seconds or 180 rpm, and do it in two or three dives. Releasing an abalone, which can cling to rock with a force equal to 4,000 times its own body weight, requires multiple dives by the otter. [102]
A study published in 2010 by Wichita State University compared two note-taking methods in a secondary English classroom, and found that the Cornell note-taking style may be of added benefit in cases where students are required to synthesize and apply learned knowledge, while the guided notes method appeared to be better for basic recall.
A 2010 study considered whales to be a positive influence to the productivity of ocean fisheries, in what has been termed a "whale pump". Whales carry nutrients such as nitrogen from the depths back to the surface. This functions as an upward biological pump, reversing an earlier presumption that whales accelerate the loss of nutrients to the ...