The change in fossils at the K-T sediment layer suggests that in addition to the dinosaurs, _________ also went extinct.
Fill in the blank(s) with the appropriate word(s)
Answer: About three-quarters of all species living at the time
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Why do nocturnal animals usually have large pupils in their eyes? How is that related to the way astronomical telescopes work?
What will be an ideal response?
An electric car is designed to run off a bank of 14.0-V batteries with total energy storage of 3.00 × 10^7 J. If the electric motor draws 7 000 W, what current will be delivered to the motor?
a. 500 A b. 250 A c. 750 A d. 375 A e. 125 A
The horizontal and vertical components of the initial velocity of a football are 16 m/s and 20 m/s respectively. If there is no air resistance, how long does it take the football to reach the top of its trajectory?
A) 1.0 s B) 2.0 s C) 3.0 s D) 4.0 s E) 5.0 s
The Sun is a fairly normal star
Indicate whether the statement is true or false