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Absolute zero has what numerical value on the Celsius scale?

Again neglecting air resistance, the ball thrown straight up comes to a momentary stop at the top of the path, then falls for 1.3 s. What is speed of the ball after falling 1.3 s?

When an ice cube melts, does its mass change?

An arrow is shot completely horizontally from a bow that is four feet above the ground. Another arrow is dropped from a height of four feet at the same time the first one is shot. If you neglect air resistance, which arrow should reach the ground first?

The momentum of an object remains the same when an unbalanced force acts on it.

Which of the following is a property of acidic solutions?

An incident light ray strikes a mirror with an angle of 30 degrees to the normal of the mirror. What is the angle of the reflected ray?

The equation 2H2 + O2  2H2O tells us that two molecules of H2 combine with one molecule of O2 to make how many molecules of H2O?

Which form of heat flow involves large scale displacement of groups of molecules?

Which of the following compounds would have the greatest ionic character? The electronegativity of H is 2.1. The electronegativity of Cl is 3.0. The electronegativity of Na is 0.9. The electronegativity of O is 3.5.