Tiffany loves babysitting her cousin hayden, who she thinks is the most entertaining one year old in the world. she is watching him one afternoon, when she decides to watch tv. unfortunately, she has trouble finding anything she wants to watch. a strange thing happens though: tiffany observes a change in hayden's behavior every time she changes the channel. because of this, tiffany decides to conduct an experiment to see if she can identify a pattern to his behavior. which of the following options best describes the first step of the scientific method as it occurs in this passage? tiffany concludes that hayden really likes "dora the explorer." tiffany has trouble finding anything she wants to watch on tv. tiffany observes a change in hayden's behavior every time she changes the channel.

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The first step of the scientific method is

Tiffany observes a change in Hayden's behavior every time she changes the channel.

Explanation: -

The first step of the scientific method is to make objective observations. These observations must be capable of being verified by other scientific minds.

When Tiffany observes a change in Hayden's behavior every time she changes the channel, she makes an objective observation.

This observation can be easily verified by others. It is also free from any personal opinion or beliefs.

Hence it is the first step of the scientific method.

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole