The Lorentz factor, ?,
A) is always greater than 1 for any speed greater than zero.
B) lets the time-dilation equation be expressed t = ? t0.
C) both of these
D) none of these
Answer: C
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The area under the stress-strain curve to fracture a material is equal to the _____________.
Fill in the blank(s) with the appropriate word(s).
The diagram illustrates a light source, a gas cloud, and three different lines of sight. Along which line of sight would an observer see an emission spectrum?
a. 1
b. 2
c. 3
d. 2 and 3
e. none of them
For safety in climbing, a mountaineer uses a 50-m long nylon rope that is 1.0 cm in diameter. When supporting a 90-kg climber, the rope elongates 1.6 m. Find the Young's modulus for the rope material.
What will be an ideal response?
Classify the following statement as a characteristic
(a) of electric forces only, (b) of magnetic forces only, (c) of both electric and magnetic forces, or (d) of neither electric nor magnetic forces. The force is proportional to the magnitude of the charge of the object on which the force is exerted.
1.electric forces 2.magnetic forces 3.both electric and magnetic forces 4.neither electric nor magnetic forces