The longitudinal vibrations of a semi-infinite flexible rod satisfy the wave equation utt = c2uxx for x > 0. Assume that the end x = 0 is free (ux = 0); it is initially at rest but has a constant initial velocity V for a < x < 2a and has zero initial velocity elsewhere. Plot u versus x at the times t = 0, a/c, 3a/2c, 2a/c, and 3a/c

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

Both speed and velocity measure how fast something is moving. however, since speed is not a it does not require a(n question 6 options: a) quantity , unit b) magnitude, unit c) scalar, direction d) vector, direction