Measurement and Vectors

What is the equivalent of 42.3 centimeters in meter?

• 0.0423 m

• 0.423 m

• 4.23 m

• 42.3 m

Which of the following is equivalent to a 76.2 picometer?

• 7.62 x 10^-2 m

• 7.62 x 10³ m

• 7.62 x 10⁸ km

• 7.62 x 10^-8 mm

In expressing numbers to scientific notation, the exponent is positive if the decimal is moved _______________.

• to the left

• to the right

• twice to the left

• twice to the right

Mary is making pancakes for 25 children at birthday party. The pancakes should be 45 g each. How many pounds of pancake mix should she use?

• 2.5 lb

• 2.4 lb

• 1.8 lb

• 1.1 lb

Calix is doing his daily activity in the gym. He starts to use the treadmill and runs for 15 kph to start his routine. What is his speed in m/s?

• 1.5 m/s

• 4.1 m/s

• 4.2 m/s

• 7.5 m/s

Which of the following apparatus provides the most accurate measurement for measuring volume of a liquid?

• beaker

• burette

• graduated cylinder

• electronic balance

In a Physics class, Bon measured the diameter of a coin using a vernier caliper for four times as part of the data gathering procedure of his experiment. What type of measurement error might he commit?

• random error

• systematic error

• environmental error

• observational error

Jingle forgot to calibrate her platform balance before she measured the mass of the reactants in a Chemistry experiment. She committed 75% error in her measurement. What type of measurement error did she commit?

• random error

• systematic error

• environmental error

• observational error

Which of the following group of measurements is most precise?

• 0.5 g, 0.05 g, 0.005 g, 0.0005 g

• 1.25 cm, 2.5 cm, 5.0 cm, 10.0 cm

• 24.0 mm, 12.0 mm, 6.0 mm, 3.0 mm

• 2.30 kg, 2.35 kg, 2.29 kg, 2.31 kg

The density of silver is 10.49 g/cm^3. Experimental result gives the value of 13.35 g/cm^3. What is the percent error?

• 21%

• 27%

• 73%

• 79%