Answer: Chemical composition modification (or, physical signal would be color).
Not sure about the last one, but I think the percent composition of zinc would be ~ 42.8232
1. The <span>student with a measurement that might be in centimeters is A. Bill.
2. C</span><span>entimeters in 0.05 kilometers is </span>C. 5,000
solution:
0.05 km x (1000 meters/ 1 km)
= 50 meters x (100 cm/ 1 meter)
=5000 cm
The answer would b B, a leaf blowing across a field.
hope this helps.
Kr look on periodic table it's krypton elements
