Why do x-ray technicians stand behind a shield when giving x-rays to patients? a. because large doses of x-rays cause blindness b. because they can more accurately see the patient's bones c. because they need to protect themselves from patient disease d. because large doses of x-rays are known to cause cell damage and cancers

While in europe, if you drive 125 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car’s gas mileage is 32.0 mi/gal? assume that 1 euro=1.26 dollars

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.

What is the difference between a substance "getting wet" and "being dissolved" in a liquid at the particulate level?