The SI unit for mass is ____. A) kilogram B) gram C) pound D) troy ounce E) none

Question

The SI unit for mass is ____. A) kilogram B) gram C) pound D) troy ounce E) none 1 nanometer = _____ picometers A) 1000 B) 0.1 C) 0.01 D) 1 E) 10 1 kilogram = ____ milligrams A) 1 times 10^-6 B) 1,000 C) 10,0000 D) 1,000,0000 E) none of these answers The density (in g/cm^3) of a gold nugget that has a volume of 1.68 cm^3 and a mass of 32.4 g is A) 0.0519 B) 19.3 C)54.4 D)0.0184 E)32.4 The number 0.00430 has_____ significant figures. A) 2 B) 3 C) 5 D)6 E)4 Which of the following liquids has the greatest density? A) 13cm^3 with a mass of 23 g B) 3.5cm^3 with mas of 10 g C) 0.022cm^3 with a mass of 0.10 g D) 54 cm^3 with a mass of 45 g E) 210 cm^3 with a mass of 12 g Precision refers to____. A) how close a measured number is to other measured numbers B) how close a measured number is to the true value C) how close a measured number is to the calculated value D) how close a measured number is to zero E) how close a measured number is to infinity 8. Accuracy refers to____. A) how close a measured number is to zero B) how close a measured number is to the calculated value C) how close a measured number is to other measured numbers D) how close a measured number is to the true value E) how close a measured number is to infinity Which of the following has the same number of significant figures as the number 1.00310? A) 1 times 10^6 B) 199.791 C) 8.66 D) 5.119 E) 100 Round the number 0.08535 to two significant figures. A) 0.09 B) 0.086 C) 0.0854 D) 0.085 E) 0.08535 One angstrom, symbolized A. is A) 10^24 B) 10^-24 C) 10^30 D) 10^-30 E) 10^-9 A negatively charged rod is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be charged: A) positive. B) negative. C) neutral, D) none of the given answers Two charged objects attract each other with a certain force. If the charges on both objects arc doubled with no change in separation, the force between them: A) quadruples. B) doubles. C) halves. D) increases, but we can't say how much without knowing the distance between them. Which of the following is not a vector? A) electric force B) electric field C) electric potential; D) electric line of force A negative charge is moved from point A to point B along an equipotential surface. A) The negative charge performs work in moving from point A to point B. B) Work is required to move the negative charge from point A to point B. C) Work is both required and performed in moving the negative charge from point A to point B. D) No work is required to move the negative charge from point A to point B.

Explanation / Answer

1) Option - A

2) Option-A[1nanometer = 10-9 m and 1 picometer = 10-12 m]

3) Option -C [1 Kilogram =1000 gm = 10,000 mg]

4)Option - B

5) Option - B

(Density = mass/volume = 32.4/1.68 =19.28 (or) 19.3 gm/cc

6) Option -C (Using the formula, density=mass/volume, it is found the density is higher for option (c))

7) Option -B

8) Option -D

9) Option -A

10) Option -C

11) Option -A (since 1A.U. = 10-8 cm)

12) Option -A

13)Option -A (Using Coulomb's equation, F = kq1q2/r2)

14) Option-B

15) Option-D

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