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?

i'm on my way to history not a mistory.

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.