A copper wire (d 5 1.5 mm) is bent around a tube of radius R 5 0.6 m. The maximum normal strain in the wire is approximately:
(A) 1.25 3 1023
(B) 1.55 3 1023
(C) 1.76 3 1023
(D) 1.92 3 1023
(A) 1.25 3 1023
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Snell's Law: A glass plate with an index of refraction is 1.57 is immersed in an oil having a refractive index of 1.40. The surface of the glass is inclined at an angle of 54° with the vertical. A horizontal light ray in the glass strikes the interface. What is the angle that the refracted ray, in the oil, makes with the horizontal?
A. 11° B. 5.6° C. 8.3° D. 14° E. 17°
One of the methods used to date supernova remnants (the remains of exploded stars) today is by using
A. the works of Ptolemy. B. the records of ancient Chinese, Japanese, and Korean astronomers. C. Kepler's laws. D. the notebooks of Galileo.
Europa is located outside the Sun's habitable zone and yet may be habitable. How can this be?
A) Europa's subsurface ocean contains lots of minerals that allow water to remain liquid at much lower temperatures B) Europa is continually being hit by comets and asteroids which keeps water beneath its surface liquid C) Europa is tidally heated, allowing liquid water to exist beneath its icy surface D) Europa is large enough to have appreciable heat trapped inside it to keep water beneath the surface liquid
Which of the following is the basic [and most accurate] meaning of "mass"? An object's "mass" is
A) the force exerted on it by gravity. B) the amount of inertia it contains. C) the number of atoms it contains. D) the amount [or quantity] of matter it contains.