A certain cluster of stars has the following characteristics: It is made up of a few thousand young blue stars. These stars are well spread out. The cluster seems to have no definite order or shape. What could this cluster be? A) an open cluster B) a spiral galaxy C) a globular cluster D) an elliptical galaxy

what best describes physical development during adolescence is the development of secondary sex characteristics happens at a rate unique to each individual.

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

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air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.