AP (Advanced Placement) Physics(BC): Questions 379  381 of 921
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Question number: 379
Question
Students set up a box race, in which two boxes are allowed to slide down a ramp so that they are moving at the same speed when they reach the floor. The boxes are identical, except that box contains one book and box is filled with books so that its mass is times the mass of box . The distance each box travels across the floor after leaving the ramp is compared, so that the box that travels the farthest is declared the winner. Which box will win the competition?
Choices
Choice (5)  Response  

a.  Box 

b.  Box 

c.  It will be a tie; that is, the boxes will travel the same distance across the floor. 

d.  The outcome cannot be determined without knowing the mass of the contents of each box. 

e.  None of the above 

Question number: 380
» Magnetic Field & Electromagnetism
Question
In the illustration, an electron enters a magnetic field from the right. Which of the following statements best describes the path of the electron as it travels through the field?
Choices
Choice (5)  Response  

a.  It travels straight through the field undisturbed. 

b.  It travels in a circle starting out of the page. 

c.  It travels in a circle starting into the page. 

d.  It travels in the direction to which the magnetic field points. 

e.  None of the above 

Question number: 381
Question
A solution is comprised of two liquids that are nonmiscible, that is, they do not dissolve in each other to produce a reduction in total volume. The solution is made of of liquid A, which has a specific gravity of , and of liquid , which has a specific gravity of . What is the specific gravity of the solution?
Choices
Choice (5)  Response  

a.  0.58 

b.  0.75 

c.  1.2 

d.  0.67 

e.  None of the above 
