You are trying to cross a river that flows toward the south with a strong current. You start out in your motorboat on the east bank desiring to reach the west bank directly west from your starting point. You should head your motorboat
A) directly toward the west.
B) directly toward the north.
C) in a general southwesterly direction.
D) in a general northwesterly direction.
D
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A pressure of 10.0 mm Hg is measured at the triple-point of water using a constant-volume gas thermometer. What will the pressure be (in mm Hg) at 50.0°C?
A. 68.3 B. 1.80 C. 31.8 D. 11.8 E. 8.50
What is the activation energy of a chemical reaction if the reaction rate triples when the temperature goes from 10
to 30
?
a. 
b. 
c. 
d. 
e. 
Which of the following planets has a ring system?
A) Jupiter B) Saturn C) Uranus D) Neptune E) All of the above
A 2500-N pile-driver ram falls 10 m and drives a post 0.1 m into the ground. The average impact force on the ram is
A) 2,500 N. B) 25,000 N. C) 250,000 N. D) 2,500,000 N.