what is a quantity such as mass, length, or speed which is completely specified by its magnitude and not direction called?

Scalar quantity

Explanation:

Scalar quantities are measurements that consist of only a magnitude which is measured in numbers only. For example speed is a magnitude because it measures how fast something is going.

Vector quantities are measurements that include a magnitude and direction which means there is a number measurement and a direction associated with that measurement. For example, velocity is a vector quantity because there is a measurement of speed, and it also includes the direction of the speed.

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19