A book is placed on a chair. Then a videocassette is placed on the book. The floor exerts a normal force
a. on all three. b. only on the book.
c. only on the chair.
d. upwards on the chair and downwards on the book.
e. only on the objects that you have defined to be part of the system.
C
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Write out the number 9.45 × 10-5 in full with a decimal point and correct number of zeros
A) 0.00000945 B) 0.0000945 C) 0.000945 D) 0.00945 E) 0.0945
Point charges of equal magnitudes (25 nC) and opposite signs are placed on (diagonally) opposite corners of a 60-cm × 80-cm rectangle. If point A is the corner of this rectangle nearest the positive charge and point B is located at the intersection of the diagonals of the rectangle, determine the potential difference, VB?VA.
A. ?47 V B. +94 V C. zero D. ?94 V E. +47 V
What are the three types of rocks?
What will be an ideal response?
Wave interference occurs for
A) sound waves. B) light waves. C) water waves. D) all of the above E) none of the above