How are whales different from fish?

On the surface, whales and fish share many things: use of aquatic environments, they are vertebrates and have morphological adaptions that facilitate locomotion in water. The latter is described in detail here: The repeated invasion of aquatic and marine environments by tetrapods over the last 250 million years has resulted in a host of convergent morphological adaptations that facilitate life in water (Kelley and Pyenson, 2015). Among these adaptations are the evolution of a fusiform body ...
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Homeschooling Resources

During this difficult time, parents and childcare providers may be seeking resources to help with homeschooling or tutoring their children. We tend to tutor math, physics, biology and chemistry so I will focus on those subjects: Khan Academy The math and science courses are personalized by your skill level and with skill assessments. The videos are great resources because you can pause and review any material that didn't make sense the first time. You can always slow playback speed if the in...
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Math and Science Tutor

I'm a UW grad looking for qualified math, science, and writing tutors who can also help kids w/ organization issues. This position would entail travelling to a student’s home, a library or café to meet for what are typically hour long sessions. You would be classified as an independent contractor and have the flexibility to accept or pass on opportunities. Pay would depend on the tutor’s qualifications and the location of the tutoring session. Pay ranges from $30-$50 per hr. There is no guarante...
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Graphing trigonometric functions

Trigonometric functions begin with a review of the unit circle and trig ratios. Y=sin(x) begins at the origin, peaks y=1, crosses the x-axis at pi, bottoms out at y=-1 and ends its first period at 2pi,0. Y=cos(x) starts at y=1, descends to cross the x-axis at pi/2, bottoms out at y=-1, crosses the x-axis at 3pi/2, and finishes its period at 2pi. Now, for all functions F(t)=A(Bt-C) + D where f(t) is a trig function, we know that: A: amplitude, B:period=2pi/|B|, C: phase shift is C/B...
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