What is another name for a pure substance?

What are some examples of balanced forces and unbalanced forces? what are some examples of balanced forces and unbalanced forces?

A displacement is related to time as x = A sin (2? ft), where A and f are constants. Find the dimensions of A. [Hint: A trigonometric function appearing in an equation must be dimensionless.] A. L * T B. L / T C. L D. T / L E. T

What type of friction prevents a pile of rocks from falling apart? A) Cohesive Friction B) Static Friction C) Rolling Friction D) Kinetic Friction

To a fish, the 4.20 mm thick aquarium walls appear to be only 3.80 mm thick. What is the index of refraction of the walls?

Is the extension of a spring directly proportional indirectly proportional or inversely proportional to the force applied

Which involves grouping items together because they are alike in some way?

Which of the following represents a concave lens

A train travels at a speed of 30 miles/hour and traveled a distance of 240 miles. How long did it take the train to complete its journey?

Which statement best describes how waves carry energy? A. Energy moves from one place to another through the wave. B. Energy increases as it moves through the wave. C. Energy is completely consumed by the beginning of the wave. D.

What forces act upon an object dropped in a vacuum