Your the speed of sound in air (in m/s) depends on the temperature according to the approximate expression below, where tc is the celsius temperature. in dry air the temperature decreases about 1°c for every 150 m rise in altitude v 331.5+0.607tc changeis constant up to an atude of 9000 m, how ling wit ik take the sound trom an arplane at 7,100 m to resch the ground on a day when the ground temperature is 35°c? (b) compare this to the time interval required if the air were constant at 35°c. which time interval is longer? o air at changing temperature air at constant temperature 9 17 p031 m family ice show is held at an enclosed arena. the skaters perform to music with level 79.0 ab. this level is too loud for (a) what total sound intensity enguifs you?

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s