The coefficient of linear expansion of ordinary glass is three times that of Pyrex glass. An ordinary glass rod and a Pyrex glass rod of equal lengths at room temperature are dropped into boiling water. The change in length of the ordinary glass rod will be 3 times the change in length of the Pyrex glass rod
a. True
b. False
Indicate whether the statement is true or false
True
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The one object in the solar system suspected of having a semi-liquid on its surface is ____________
Fill in the blank(s) with correct word
A shock wave is
A) the opposite of a bow wave. B) usually composed of a pair of closely spaced cones. C) weak for aircraft that fly at less than the speed of sound. D) all of the above E) none of the above
Spherical Mirrors: If a spherical concave mirror has a radius of curvature R, its focal length is
A. R/4. B. R/2. C. R. D. 2R. E. 4R.
A certain photon after being scattered from a free electron at rest moves at an angle of 120° with respect to the incident direction. If the wavelength of the incident photon is 0.591 nm, what is the energy of the scattered photon?
A) 1.05 × 10-16 J B) 2.10 × 10-16 J C) 5.71 × 10-16 J D) 3.34 × 10-16 J E) 4.21 × 10-16 J