NLN Practice Questions and Answers with complete solution

1 kilogram (kg) of solid X at 10°C and 1 kg of solid Y at 10°C each absorb 5 joules of heat energy. The final temperatures of X and Y are 15°C and 20°C, respectively. Compared to X, Y must have a lower specific heat. conductive heat. heat of fusion. heat of vaporization. - Answer-specific heat. A drop of dilute ammonium hydroxide (NH4OH) is placed on one side of a slide containing a large number of swimming paramecium. Under this condition, which of these behaviors of the paramecia will be observed? They will eventually all swim toward the ammonium hydroxide. They will show no net change in behavior to the ammonium hydroxide. They will all be instantly killed by the ammonium hydroxide. They will eventually all swim away from the ammonium hydroxide. - Answer-They will eventually all swim away from the ammonium hydroxide. A method for determining the blood alcohol content of a subject is to do a Mantoux test. do a Dick test. use a Breathalyzer. inspect the size of the pupils. - Answer-use a Breathalyzer. A physician measures the pulse and blood pressure (BP) of all patients on a routine basis. Which of these measurements show the normal BP values for a resting adult patient? 125/95 mm Hg 120/80 mm Hg 100/80 mm Hg 72/120 mm Hg - Answer-120/80 mm HgA woman suddenly chokes on a piece of food and clutches frantically at her throat. An immediate remedy is to have her bend forward and tell her to cough. insert a finger or a blunt object toward the back of the mouth. apply quick, hard pressures successively to her abdomen, just beneath her diaphragm. phone "emergency" for help - Answer-apply quick, hard pressures successively to her abdomen, just beneath her diaphragm. An unknown gas is more dense than air, does not support combustion, and turns a limewater solution cloudy. This gas is most probably ammonia. methane. carbon dioxide. hydrogen. - Answer-carbon dioxide If the medulla of the brain in a human was damaged, which of these conditions would most likely result? Inability to remember. Difficulty in breathing. Inability to speak. Blurred vision. - Answer-Difficulty in breathing. In diagnostic testing, the electroencephalogram permits the physician to examine the impulses of the specialized muscle cells of the heart. examine the impulses of the nerve cells within the brain. measure the pressure within the eye. measure the amount of air upon exhalation. - Answer-examine the impulses of the nerve cells within the brain. In ecological succession, the first living thing to colonize a hitherto barren area is called aproducer. primary consumer. pioneer organism. carnivore. - Answer-pioneer organism. In varieties of matter, the term heterogeneous may be applied to elements, but not compounds. compounds, but not elements. compounds and elements, but not mixtures. mixtures, but not elements or compounds. - Answer-mixtures, but not elements or compounds.