What is the true shape of earth and the proof?

weather satellites orbit esrth at and altitude of 1,400,000 meters. what is the altitude in kilometers?

If a guitar string vibrates 20 times each second, what is its frequency?

Number of electrons in outer ring for phosphorus

a value of pH 7.0 indicates A) a zero hydrogen-ion concentration B) the lowest hydrogen-ion concentration C) the highest hydrogen-ion concentration D) equal hydrogen and hydroxide-ion concentration

A box of mass 3.0 kg is accelerated from rest across a floor at a rate of 3.0 m/s2 for 4.0 s. what is the net work

What is meant by the statement, "a thermometer measures its own temperature"?

How does electrical forces act on a maglev train

Three identical 6.0-kg cubes are placed on a horizontal frictionless surface in contact with one another.

How does momentum before an inelastic collision compare to the momentum after the collision?

Why should people pay attention to scientists when making decisions? A) scientist are the smartest people B) Scientist make up facts that they wish true C) scientist use experiments to test their ideas D) scientist are always correct