. Two identical soccer balls are rolled toward each other. What will be true after they collide head-on? (2 points)

They will both stop rolling immediately after they collide head-on.

One ball will stop rolling and the other will roll backward at a slower speed.

They will both roll back at the same speed they had before the collision.

They will both roll to the side at a faster speed after the collision.

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)