An object is launched upward. While it is moving upward, which of the following statements is accurate? 1. Velocity is positive, and acceleration is negative.
2. Velocity is negative, and acceleration is negative.
3. Velocity is positive, and acceleration is positive.
4. Velocity is negative, and acceleration is positive.

concave lenses are used here. they spread the light out before it reaches the convex lens in the eye, therefore letting the image focus directly on the retina. hyperopia is known to you probably as farsightedness.

explanation:

as the height from which the ruler was dropped increased, the speed of the ruler at ryan's hand increased.

show the wavelengths of a wave. show the crests of a wave.

heats surface water up