Use the special relativistic velocity addition law to show that if a particle has velocity v = tanh & then in a frame moving at velocity v = tanh along the same direction the velocity of the particle is given by dº = tanh(0 - 6) (b) a free particle is moving along the x-axis of an inertial frame with speed do = v, passing through the origin at time t = 0. express the particle's worldline parametri- cally in terms of v using the proper time as the parameter.

Independent variable is something that is changed in a experiment. 

Jenny and fred both play a long note on their trombones. a stationary observer hears the sound increasing and decreasing repeatedly in loudness. which of these must be true? the sound waves from the two trombones have slightly different frequencies.the sound waves from the two trombones have the same frequency.the sound waves from the two trombones have slightly different amplitudes.the sound waves from the two trombones have the same wavelength.the sound waves from the two trombones have slightly different velocities.  lolthe answer is          the sound waves from the two trombones have slightly different frequencies.

The correct answer for the first question is a. because if cold air is denser then the warm air will be pushed out of the way. the coreect answer for the 2nd question is a.

There is not a picture so i will answer this as best as i can usually when the roller coaster has the greatest potential energy is when it is sitting at the crest of the hill.