Which of the following is the simplest possible hydrocarbon?

A) CH4
B) H2
C) HC=CH
D) H2C=CH2
E) C2H6


Answer: A

Physics & Space Science

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A charged particle is moving with speed v perpendicular to a uniform magnetic field. A second identical charged particle is moving with speed 2v perpendicular to the same magnetic field

If the frequency of revolution of the first particle is f, the frequency of revolution of the second particle is A) f. B) 4f. C) 2f. D) f/2. E) f/4.

Physics & Space Science

A microscope has an objective lens of focal length 1.40 mm and an eyepiece of focal length 20.00 mm. It is adjusted for minimum eyestrain for persons with a near point of 25.0 cm. A blood sample is placed 1.50 mm from the objective

How far apart are the lenses? A) 20 mm B) 21 mm C) 23 mm D) 41 mm

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A boat moves at 11.0 m/s relative to the water. If the boat is in a river where the current is 2.00 m/s, how long does it take the boat to make a complete round trip of 1000 m upstream followed by a 1000 m trip downstream?

a. 188 s c. 208 s b. 205 s d. 222 s

Physics & Space Science

The iridium layer at the Cretaceous-Tertiary boundary is attributed to

A) meteorite bombardment. B) massive volcanic eruptions. C) massive earthquakes and shock waves. D) extinction of the dinosaurs.

Physics & Space Science