Aball is thrown upwards at 20m/s what is its displacement from its starting position at 7 seconds

In this experiment, you will use a track, a toy car, and some washers to explore newton’s first two laws of motion. you will make observations and collect data regarding the motion of these objects. in the space below, write a general scientific question that you will answer by doing this experiment.

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?