What is a scalar?a)A quantity with only magnitudeb)A quantity with only directionc)A quantity with both magnitude and directiond)A quantity without magnitudeCorrect answer is option 'A'. Can you explain this answer?

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ACT Exam > ACT Questions > What is a scalar?a)A quantity with only magni...

What is a scalar?

a)
A quantity with only magnitude
b)
A quantity with only direction
c)
A quantity with both magnitude and direction
d)
A quantity without magnitude

Correct answer is option 'A'. Can you explain this answer?

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What is a scalar?a)A quantity with only magnitudeb)A quantity with onl...

A scalar quantity is one which only has a magnitude. Examples of scalar quantities are mass, volume, work, energy etc.

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The quantity which has the only magnitude is called ________

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Directions:Read the passages and choose the best answer to each question.PassageStudents wanted to test the effects of nutrition on the growth of guinea pigs. Two experiments were conducted using different feeds and vitamin supplements. For both experiments, four groups of 10 guinea pigs each were given a different type of feed over an 8-week period. Each group received the same quantity of food and was provided with fresh water daily. The guinea pigs were measured and weighed weekly. The guinea pigs in each group had an average starting weight of 50 grams (g) and an average starting length of 20 centimeters (cm).Experiment 1Group 1 was fed a high-protein feed (Feed P).Group 2 was fed a grain-based feed with vitamin supplements (Feed Q).Group 3 (control group) was fed a grain-based feed without supplements (Feed R).Group 4 was fed a grain-based feed without supplements plus fruits and vegetables (Feed S).The results and average measurements are recorded in Table 1 below.Experiment 2Group 5 was fed a high-protein feed plus fruits and vegetables (Feed V).Group 6 was fed a grain-based feed with vitamin supplements plus fruits and vegetables (Feed W).Group 7 (control group) was fed a grain-based feed without supplements (Feed X).Group 8 was fed a grain-based feed without supplements plus fruits only (Feed Y).The results and average measurements are recorded in Table 2 below.Q.Based on the results of Experiment 1, the guinea pigs in the group that was fed a grain-based feed with vitamins gained how much weight, on average, during each week of the experiment?

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A physicist performs a series of experiments to determine the relative magnitude of electric charge on four particles. A given particle is considered to have a higher magnitude of charge than another if it will push out (or draw in) a positive test charge farther than the other particle.A particle that pushes the test charge has positive charge, while a particle that pulls (or draws in) the test charge has negative charge. This is known as the sign of the charge. Magnitude of charge is unrelated to sign.The experiment is conducted on a horizontal axis that measures from 20m in total: from –10m on the left to +10m on the right, with a measurement of 0m in the middle.Experiment 1Particle A is placed at position –5m on the horizontal axis. The test charge has a specific magnitude of charge and is located at +3m on that same axis. The result of the experiment is that the test charge is displaced to +7.5m.Experiment 2Particle B is placed at position –8m on the horizontal axis. The test charge has the same magnitude of charge as the previous experiment and is located at 0m on that same axis. The result of the experiment is that the test charge is displaced to –7.5m.Experiment 3Particle C is placed at position 0m on the horizontal axis. The test charge has the same magnitude of charge as the previous experiment and is located at +8m on that same axis. The result of the experiment is that the test charge is displaced to +10m.Experiment 4Particle D is placed at position –5.5m on the horizontal axis. The test charge has the same magnitude of charge as the previous experiment and is located at +2.5m on that same axis. The result of the experiment is that the test charge is displaced to +7.5m.Q.The results of Experiment 1 and 2 show that __________.

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A physicist performs a series of experiments to determine the relative magnitude of electric charge on four particles. A given particle is considered to have a higher magnitude of charge than another if it will push out (or draw in) a positive test charge farther than the other particle.A particle that pushes the test charge has positive charge, while a particle that pulls (or draws in) the test charge has negative charge. This is known as the sign of the charge. Magnitude of charge is unrelated to sign.The experiment is conducted on a horizontal axis that measures from 20m in total: from –10m on the left to +10m on the right, with a measurement of 0m in the middle.Experiment 1Particle A is placed at position –5m on the horizontal axis. The test charge has a specific magnitude of charge and is located at +3m on that same axis. The result of the experiment is that the test charge is displaced to +7.5m.Experiment 2Particle B is placed at position –8m on the horizontal axis. The test charge has the same magnitude of charge as the previous experiment and is located at 0m on that same axis. The result of the experiment is that the test charge is displaced to –7.5m.Experiment 3Particle C is placed at position 0m on the horizontal axis. The test charge has the same magnitude of charge as the previous experiment and is located at +8m on that same axis. The result of the experiment is that the test charge is displaced to +10m.Experiment 4Particle D is placed at position –5.5m on the horizontal axis. The test charge has the same magnitude of charge as the previous experiment and is located at +2.5m on that same axis. The result of the experiment is that the test charge is displaced to +7.5m.Q. The results of experiments 3 and 4 show that __________.

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What is a scalar?a)A quantity with only magnitudeb)A quantity with only directionc)A quantity with both magnitude and directiond)A quantity without magnitudeCorrect answer is option 'A'. Can you explain this answer?

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