Awave traveling in a string can be described by the function y of xt is equal to 3 times cosine of ( 0.5 times x - 4 times t ) where x is measured in meters, y is measured in centimeters, and t is measured in seconds. what is the speed of this wave?

8 m/s

Explanation:

y = 3 Cos (0.5 x - 4 t)

Compare with the standard equation of a wave

Here, T be the time period, λ be the wavelength and A be the amplitude of the wave.

Let the wave velocity is v.

By comparison

2 π / T = 4

T = 2 π / 4 = π / 2 second = 0.5 π second

And

2 π / λ = 0.5

λ = 2 π / 0.5 = 4 π

use v = f λ = λ / T

v = 4 π / 0.5 π = 8 m/s

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.

statement #3 on andre"s list is false.