The adoption of very similar streamlined body shapes by both sharks and dolphins provides evidence for
A) cross-breeding
B) convergent evolution
C) genetic mutations
D) life originating in the oceans
B
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Novae always occur in a close binary star system
Indicate whether the statement is true or false
A hockey puck moving at 7.00 m/s coasts to a halt in 80.0 m on a smooth ice surface. What is the coefficient of friction between the ice and the puck?
a. ? = 0.109 b. ? = 0.031 c. ? = 0.063 d. ? = 0.094 e. ? = 0.156
Imagine that you could put three electrons into isolation in a box. Initially, electrons A and B have kinetic energy E0 and electron C has kinetic energy 2E0. After isolation from observation for a short time, you examine the electrons again and find that one electron has energy 2E0 and two electrons have energy E0
Assume for this problem's sake that the electrons can transfer energy to one another but only in increments of E0. Assume also that all electrons are exactly the same. What is the probability that the higher energy electron is electron C?
Material that falls into a black hole can be seen by the electromagnetic radiation it emits before it reaches the event horizon
Indicate whether the statement is true or false