Physics 1408

Since you may take the online quizzes as often as you like, your highest average should be pretty good. However, in order to keep track, you must fill out the student name and id# part of the form.

Question 1. The approximate mass (in kg) of a column of air 1 cm² in area that extends from sea level to the upper atmosphere is

(a) 0

(b) 1

(c) 2

(d) 5

(e) 10

 

 

Question 2. The weight (in N) of the column of air mentioned in the previous problem is

(a) 0

(b) 1

(c) 2

(d) 5

(e) 10

 

 

Question 3. The pressure (in N/cm²) at the bottom of the column of air will be

(a) 0

(b) 1

(c) 2

(d) 5

(e) 10

 

 

Question 4. A balloon that weighs 1 N floats in the air, drifting neither up nor down. The weight (in N) of the air displaced by the balloon is

(a) 0

(b) 1

(c) 2

(d) 5

(e) 10

 

 

Question 5. When you try to blow a ping pong ball out of a funnel, you are doing battle with

(a) Archimedes' Principle

(b) Bernoulli's Principle

(c) Pascal's Principle

(d) The Peter Principle

(e) Occam's Razor

 

 

Question 6. When you replace the helium in a balloon of a given size by hydrogen gas the buoyant force (in N)

(a) Increases

(b) Decreases

(c) Remains the same

 

 

Question 7. For the balloon in the previous question, the net force (in N)

(a) Increases up

(b) Decreases up

(c) Remains the same

(d) Increases down

(e) Decreases down

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