Author Question: The vertical displacement of a string is given by y(x,t) = (6.00 mm) cos(3.25 m-1)x - (7.22 s-1)t. ... (Read 73 times)

nevelica · **on:** Jul 29, 2018

The vertical displacement of a string is given by y(x,t) = (6.00 mm) cos(3.25 m-1)x - (7.22 s-1)t. What is the amplitude of the wave?

A)

6.00 mm
B)

12.0 mm
C)

3.00 mm
D)

2.00 mm
E)

None of the other choices is correct.

Question 2

Because Earth's orbit is slightly elliptical, Earth actually gets closer to the Sun during part of the year. When Earth is closer to the Sun its orbital speed is

A)

less than when Earth is farthest away from the Sun.
B)

the same as when Earth is farthest away from the Sun.
C)

greater than when Earth is farthest away from the Sun.
D)

sometimes greater sometimes smaller than when Earth is farthest away from the Sun.