If the speed of an object changes, the object must be experiencing an acceleration. True or False

Determine the maximum r-value of the polar equation r =3+3 cos 0

Which composition of water moves to begin a deepwater current?

Suppose that three astronomical objects, 1, 2, and 3 are observed to lie on a line, and the distance from object 1 to object 3 is d. object 1 has four times the mass of object 3, and seven times the mass of object 2. find the distance between objects 1 and 2 for which the net force on object 2 is zero.