Dimensional Analysis
The value of 27 km/hr in m/s.
7.5 m/s
True or False: Uncertainty in a measurement is dependent on the accuracy of the measuring instrument.
30+ pts if you can described the difference between precision and accuracy.
False. It is dependent on the precision of the instrument.
Precision is the certainty to which a measurement is known (reflected with correct sigfigs). Accuracy means agreement of a measured value to the true value.
275°C in units of Kelvin.
K = °C + 273.15
548 K
The amount of seconds in 1.23 years. (1 yr = 365 days)
3.88 x 107 s
(1) What observations like color are called
vs
(2) what observations like measurements are called.
1. Qualitative
2. Quantitative.
300.0°F into units of Kelvin. (remember sig figs)
K = °C + 273.15
°F = 1.8 (°C) + 32
422.0 K
The amount of mm in 3.20 cm.
A) 3.20 × 101 mm
B) 3.20 × 10-1 mm
C) 3.20 × 10-2 mm
D) 3.20 × 102 mm
E) 3.20 × 103 mm
A) 3.20 × 101 mm
Three of the six SI base quantities and the corresponding units.
Length (meter, m)
Mass (kilogram, kg)
Time (second, s)
Temperature (Kelvin, K)
Amount of substance (Mole, mol)
Electric current (Ampere, A)
The volume of an object that has a mass of 455.6 g and a density of 19.3 g/cm3. (1 cm3 =1 mL) D = m/v
A) 87.9 mL
B) 42.4 mL
C) 18.5 mL
D) 23.6 mL
E) 31.2 mL
D) 23.6 mL
The quantity that represents the largest mass.
a. 2.0 x 102 cg
b. 10.0 ng
c. 2.0 x 105 µg
d. 2.0 x 102 mg
e. 0.0010 kg
a. 2.0 x 102 cg
The two derived quantities/units from base SI units.
Energy and volume
The answer that should be reported.
(123.730 - 100.8) x 14.706
A. 3.3721 * 102
Β. 3.37209 * 102
C. 3.372 * 102
D. 3.37 * 102
D. 3.37 * 102
Steps:
1. (123.730 - 100.8) * 14.706 (decimal place)
2. 22.9 * 14.706 (sig figs)
3. 337
4. 337 = 3.37 * 102
A person will require about one quart of water for every three miles they walk. Calculate the approximate number of liters of water required for a person to walk 2500 meters. (1 mile = 1.6 km, 1 quart = 0.946 L)
0.49 L
See slideshow for graduated cylinder.
B.
The amount of sig figs each of the following has:
Α. 74000
B. 0.207
C. 0.200
D. 1.23 * 1024
2,3,3,3