A concave lens has an inward curved shape. It refracts light outward from the lens. The light rays spread apart as they exit the lens. Which represents a concave lens?

What type of wave is made by earth quakes

Why is the water cycle important to life on earth? the water cycle puts oxygen in the water. the water cycle moves water from place to place. the water cycle stores water for use in a time of drought.

When a resistor is connected to a 12 volt source, it draws a 185 mA current. what's the resistance? (I said 65 ohms). the same resistor connected to a 90 volt source draws a 1.25 amp current. what's the resistance? is it ohmic?

How long does it take for a star the size of the sun to become a red giant?

Which of the following is not an SI unit meter foot liter or kilogram

A swimming pool has the dimensions of 10 meters, 5 meters, and 1 meter. What is the pool's volume? 50 m 50 m3 50 m2 25 m3

A child pushes horizontally on a box of mass m which moves with constant speed v across a horizontal floor. The coefficient of friction between the box and the floor is μ. At what rate does the child do work on the box?

What two qauntities must be known to calculate the density of a sample of matter

An element's atomic number is 38. How many protons would an atom of this element have?

What's are some forms of chemical energy