Which of the models described below is least likely to produce reliable, reproducible results? *
A model for calculating interest rates versus economic growth
A wind tunnel and a model airplane to study lift and drag ratios
О
Two climate change models using similar carbon dioxide values and variables
Two climate change models with different response times based on cloud cover,
evaporation and rate of temperature change

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.

hi my dude or dudette

може ли да зареждате повече информация, моля

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.