Mort's twin, Velma, flies to a distant star at high speed and returns to Mort on Earth. She then finds that
A) she is younger than Mort.
B) they are the same age.
C) Mort is younger than her.
D) they are both younger than each other.
E) she has been changed into a giraffe.
A
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An airplane flying faster than the speed of sound of 340 m/s produces a shock wave with an angle ?0 = 50°. What is the speed of the plane?
A) 490 m/s B) 530 m/s C) 390 m/s D) 440 m/s E) 405 m/s
_________is an alloy of zinc and copper
Fill in the blank(s) with the appropriate word(s).
Two pulses are traveling towards each other at 10 cm/s on a long string at t = 0 s, as shown below
Which diagram below correctly shows the shape of the string at 0.5 s?
a.
Physics & Space Science
The electric energy density in an electromagnetic wave is higher than its magnetic energy density
Indicate whether the statement is true or false