Alpha particles cannot penetrate the skin. In which of the following circumstances could they still threaten human health? A. If they travel into the human eye.
B. If they are inhaled or swallowed.
C. If they enter into the human ear.
D. If they are touched.

In salt water solution, the salt is the blank

Predict the relative bond lengths of the three carbon-oxygen bonds in the carbonate ion (co2−3). what would you expect the charge to be on each oxygen? match the words in the left column to the appropriate blanks in the sentences on the right. make certain each sentence is complete before submitting your answer.

What are several ways to reduce the effect of friction