Assume a change at the source of sound reduces the wavelength of a sound wave in air by a factor of 7. (i) What happens to its frequency? It increases by a factor of 49. It increases by a factor of 7. It is unchanged. It decreases by a factor of 7. It changes by an unpredictable factor. (ii) What happens to its speed? It increases by a factor of 49. It increases by a factor of 7. It is unchanged. It decreases by a factor of 7. It changes by an unpredictable factor.

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.

Asystematic approach to problem solving is called a (an)

During which interval are the persons represented by the graph not moving? a) 0 to 0.5 hrs b) 1.5 to 2 hrs c) 2 to 2.5 hrs d) 4.5 to 5 hrs