What should be the angle between the reflecting surfaces of two plane mirrors in order for every incident beam to be parallel to its reflected beam?
A) 0°
B) 30°
C) 45°
D) 60°
E) 90°
E
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Two identical masses are attached by a light string that passes over a small pulley, as shown in Figure 6-6. The table and the pulley are frictionless. The masses are moving
A. with an acceleration equal to g. B. with an acceleration less than g. C. with an acceleration greater than g. D. at constant speed. E. with an acceleration that cannot be determined without additional information.
What is the audible range of sound frequencies?
What will be an ideal response?
Two examples of a longitudinal wave are __________ and __________
Fill in the blank(s) with correct word
Consider two slides, both of the same height. One is long and the other is short. From which slide will a child have a greater final speed when sliding off? Assume that there is no friction acting
1.The child on the longer slide will have a greater final speed. 2.The child on the shorter slide will have a greater final speed. 3.The final speed will be the same for the child on the longer slide as it is for the children on the shorter slide. 4.We cannot tell from the information given.