How should you manipulate these equations so that they produce the equation below when added? Check all that apply.
CaO(s) + CO2(g) - CaCO3(s)
reverse the direction of equation (2)
multiply equation (1) by 3
multiply equation (2) by 1/2

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding.i