When a constant force acts upon an object, the acceleration of the object varies inversely with its mass. When a certain constant force acts upon an object with mass 21 kg, the acceleration of the object is 3 m/s?. If the same force acts upon another object whose mass is 9 kg, what is this object's acceleration?

Is δ pmr similar to δ smn ? if so, which postulate or theorem proves these two triangles are similar?

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

An angle that measures between 90 and 180° is called a(,