Reflection from smooth surfaces is called ______________ reflection.
Fill in the blank(s) with correct word
[Ques. 2] A supertrain (rest-length = 100 m) travels at a speed of 0.950 c as it passes through a tunnel (rest-length 50.0 m). As seen by a trackside observer, is the train ever completely within the tunnel? If so, by how much?
[Ques. 3] Which of the following is not a general feature of the Moon's surface?
a. Dry ocean plains
b. Multiring basins
c. Secondary craters
d. None of these; that is, all these features are present
[Ques. 4] A change in the direction of a wave resulting from its meeting an opaque material is called ______________.
Fill in the blank(s) with correct word
[Ques. 5] When 1.0 gram of hydrogen combines with 8.0 grams of oxygen, 9.0 grams of water is formed. But is this true? During the reaction 2.86 105 J of energy is released. How much mass is actually lost in this reaction?
[Ques. 6] Pulverized rock is believed to make up the Moon's
a. rays.
b. craters.
c. rills.
d. plains (maria).
[Ques. 7] Optics is divided into ray optics and ______________ optics.
Fill in the blank(s) with correct word
[Ques. 8] The period of a pendulum is 2.0 s in a stationary inertial frame of reference. What is its period when measured by an observer moving at a speed of 0.60 c with respect to the inertial frame of reference?
[Ques. 9] The far side of the Moon
a. has never been seen.
b. has more craters than the near side.
c. looks just like the near side.
d. is always dark.
[Ques. 10] For total internal reflection, light is ______________ and none is ______________.
a. reflected, refracted
b. refracted; transmitted
c. transmitted, refracted
d. transmitted; reflected
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