Este Quiz é cronometrado.
Você tem 10 minutos para completar as 10 questões deste quiz..
Which of the following are examples of systematic errors
I. Weighing an object on an electronic balance. II. Consistently reading meter stick values from an angle. III. Using an incorrectly calibrated probe in an experiment.
I and III
I, II and III
II and III
I and II
I
II
III
Which statements about uncertainties are true?
I. Every measurement has an uncertainty. II. Uncertainties are expressions of random error. III. Uncertainties are always expressed as positive values.
What is the uncertainty in a measurement taken on an electronic balance that reads mass (in grams) to two decimal places?
+/- 0.5 g
+/- 0.05 g
+/- 0.005 g
+/- 0.1 g
+/- 0.01 g
+/- 0.001 g
If a scale reading is quoted as 23.75 ± 0.05 g, which value could not be possible for this reading?
23.72 g
23.69 g
23.80 g
23.78 g
Find z if: x = (2.0 +/- 0.2) cm y = (3.0 +/- 0.6) cm z = x - 2y = cm
Hint: answer will resemble this format: (#.# +/- #.##) units
Which of the following units can be used to measure speed?
m/s
ms^-1
km/hr
ms
m/s*s
If w = (4.52 +/- 0.02) cm and x = (2.0 +/- 0.2) cm, find z if z = wx
z = cm^2
Hint: Answer will be in this format: (#.# +/- #.#) units
If x = (2.0 +/- 0.2) cm and y = (3.0 +/- 0.6) s, find z if z = x/y.
z = cm/s
Which of the following are vectors?
Speed
Time
Velocity
Distance
Displacement
Acceleration
Take the equation 2x = (g - y) / 2 and solve for g.
Hint: For your answer, put a space between every character, so 7a+ 3b will look like 7 x + 3 b.
g =