Which diagram best represents a convex lens

The top runners in the Boston Marathon complete the 26.2 miles in about 2 hours and 10 minutes. If 1609 meters = 1 mile, what is the marathoner's speed in meters/second?

Is chalk a colloid, suspension, element, compound, or a mixture

Which of the following techniques have been employed to improve the efficiency of fireplaces? addition of catalytic combustors addition of boilers use of masonry use of venting systems

A child in about those 85.15 kg package out horizontally with a speed of 10 m/s the mass of the child is 27.2 kg in the mass of the ball is very 3.8 kg calculate the velocity of the ball immediately after assuming it was initially at rest

For the examples below, explain what a physical change or a chemical change has occurred. Justify your answer A. When you mix baking soda and vinegar, carbon dioxide is released. B. You build a tall sand castle at the beach.

Cite an example in which a force is exerted on an object without doing work on the object

Which equation best expresses the first law of thermodynamics, assuming Q is heat, U is internal energy, and W is work? A.ΔW = ΔQ + ΔU B.ΔW = ΔU - ΔQ C.ΔQ = ΔU+W D.ΔU=Q - W

Why are the action and reaction forces described by Newton's third law of motion excluded in the free-body diagram of an object?

The small depression inside the bend of the elbow is the

If r = KL/d2 find L to the nearest tenth foot if r = 2.5 ohms, k = 10.8 and = 85 mil