The Kilcher Homestead is a 600 acre Pioneer Homestead that has been protected for perpetuity via a ConservatIon Easement. The Kilcher Family has also preserved the Historic Cabin and site as a LIving Museum.
Yes, negative pH is possible, but not in water as a solvent. The range of pH in water is 0 to 14 (to be more precise, it is -1.7 to 15.7, but for simplicity's sake, we start with the usual values.) Thus, what pH indicates is the ability of the acid to form H3O+, which can then donate a proton.
No DOE. 0. 35. The sensitivity of dyspnea on exertion for the diagnosis of CHF is 100% (41/(41+0)), and the specificity 17% (35/(183+35)). If negative (the patient does not complain of dyspnea on exertion), it is very unlikely that they have CHF (0 out of 41 patients with CHF did not have this symptom). An easy way to remember this rule of thumb is the acronym SnNOut, which is taken from the phrase: Sensitive test when Negative rules Out disease.