A wave on a string is described by D (x comma t )space equals space 2.0 space c m space sin (straight pi (12.57 straight x minus 638 straight t ))spacewhere x is in m and t is in s. The linear density of the string is 5.00 g/m. (a) What is the time period of oscillation of a point on the string in seconds

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

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.

answerdmitry mendeleyev made a workable classification of the elements