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Aptitude for Registered Nursing Examination Science Sample Test

1 of 5

Which of the following items would have a mass closest to that of a thumbtack?

Correct Answer:

a paperclip

the question asks which item among the listed options has a mass closest to that of a thumbtack. the options provided are an apple, a butcher knife, a coffee mug, and a paperclip. to solve this, we need to compare the typical mass of each of these items to that of a thumbtack.

starting with the thumbtack, it is generally a small metal object used to pin items to surfaces. the mass of a typical thumbtack is approximately 1 gram. this is a key piece of information as it sets the benchmark for comparison with the other items listed.

an apple, depending on its size and variety, typically weighs between 70 to 100 grams. this is substantially heavier than a thumbtack. therefore, an apple does not have a mass close to that of a thumbtack.

a butcher knife, which is used for cutting large pieces of meat, has a significant weight to provide enough force during cutting. a typical butcher knife can weigh between 300 to 900 grams. this weight makes it far heavier than a thumbtack.

a coffee mug is designed to hold liquids and is usually made of ceramic or glass. a standard coffee mug can weigh around 300 to 400 grams, which, like the butcher knife and apple, is much heavier than a thumbtack.

finally, a paperclip, which is a small piece of bent wire used for holding sheets of paper together, weighs approximately 1 gram, very close to the weight of a thumbtack. this similarity in mass makes the paperclip the only item among the options provided that has a mass comparable to that of a thumbtack.

given these comparisons, the correct answer to the question is indeed (a) a paperclip. the other items – an apple, a butcher knife, and a coffee mug – all have masses that are significantly higher than that of a thumbtack and thus are not similar in mass to the thumbtack.