List three clues that indicate a chemical change

If the contents of a cell have a solute concentration of 0.04 percent which of these solutions would cause it to swell? A.) 10-percent solute concentration B.) 1-percent solute concentration C.) 0.1 percent solute concentration D.) 0.

If magnetism was in a crossword puzzle, what would the question be?

Two identical charges exert a force of + 0.034 N when they are 16 cm apart. What is the magnitude of each charge?

Think of ways you control temperature to influence chemical changes during a typical day. (Hint: cooking, art class)

M&S Problem 2.47 (extended) An electric motor operating at steady state draws a current of 20 ap at a voltage of 110 V. The output shaft rotates at a constant speed of 2000 RPM and exerts a torque of 9.07 N-m.

A sample contains 10 g of a radioactive isotope. How much radioactive isotope will remain in the sample after 2 half-lives? A. 7.5 g B. 5.0 g C. 2.5 g D. 10.0 g

A plane flies along a straight line path after taking off, and it ends up 210 km farther east and 90.0 km farther north, relative to where it started. What is the plane's displacement?

Compare exothermic reactions and endothermic reactions. Give at least one similarity and one difference.

A solid cylinder with a radius of 73.3 cm and a mass of 2.33 kg accelerates uniformly from rest in 4.13 seconds while experiencing 6.71 rotations. Solve for the (a) final angular velocity.

In the early stages of its formation, earth became hot enough that some of its solid materials turned to liquid. Which of these factors did not directly contribute to earths high internal temperatures