Needed: : : : thorium (th) has an average atomic mass of 232.04 u and an atomic number of 90. in the space below, draw a square from the periodic table to represent thorium.

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

Which of the following harmful chemicals are found in tobacco smoke? a. carbon monoxide b. carbon dioxide c. nicotine b. carbon dioxide d. both a and c