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30 questions

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- Q1How can you express 200,000 meters in scientific notation?200 x 10^3 m20 x 10^4 m2 x 10^5 m2 x 10^6 m30sSTEM_GP12EU-Ia1
- Q2A car travels 500 kilometers. How would this distance be written in meters using scientific notation?5 x 10^6 m5 x 10^5 m50 x 10^4 m5 x 10^4 m30sSTEM_GP12EU-Ia1
- Q3A physics experiment requires precise measurement and yields a result of 0.00039 seconds. How can you express this in scientific notation?0.39 x 10^-2 s3.9 x 10^-4 s3.9 x 10^-5 s39 x 10^-6 s30sSTEM_GP12EU-Ia1
- Q4Which statement best differentiates accuracy from precision in the context of scientific measurements?Accuracy means the measured value is exactly the same as the actual value, while precision has no relation to the actual value.Accuracy and precision in scientific measurements mean the same thing.Accuracy refers to how close a measured value is to the actual value, while precision refers to how close the results of multiple measurements are to each other.Accuracy refers to how close the results of multiple measurements are to each other, while precision refers to how close a measured value is to the actual value.30sSTEM_GP12EU-Ia2
- Q5In an experiment, if a student repeatedly measures the density of an object and gets very similar results each time, what aspect of measurement is the student demonstrating?ValidityReliabilityPrecisionAccuracy30sSTEM_GP12EU-Ia2
- Q6Which of the following best differentiates random errors from systematic errors in physics experiments?Random errors are always caused by human error, while systematic errors are not.Random errors vary in a nonsystematic, unpredictable manner while systematic errors consistently affect the results in a particular direction.Random errors cause high-level inaccuracies, while systematic errors cause low-level inaccuracies.Systematic errors are mistakes that can always be corrected, while random errors cannot.30sSTEM_GP12EU-Ia3
- Q7In a physics experiment, you repeatedly measure the length of a bar and obtain the following values in cm: 50.2, 50.5, 50.3, 50.1, and 50.4. The experimental variance of these measurements is closest to:0.020.040.060.0830sSTEM_GP12EU-Ia5
- Q8Which of the following is a vector quantity?TemperatureDistanceVelocityTime30sSTEM_GP12V-Ia-8
- Q9Which of the following is a scalar quantity?AccelerationDisplacementSpeedForce30sSTEM_GP12V-Ia-8
- Q10What distinguishes vector quantities from scalar quantities?Vector quantities have both magnitude and directionThere is no difference between vector and scalar quantitiesVector quantities only have magnitudeVector quantities only have direction30sSTEM_GP12V-Ia-8
- Q11What is the resultant vector if you were to add Vector A with a value of 3 units due east and Vector B with a value of 4 units due north? Assume that north is 90 degrees from east in a counter-clockwise direction.7 units at an angle of 45 degrees north of east5 units at an angle of 53.13 degrees north of east5 units at an angle of 36.87 degrees east of north7 units at an angle of 90 degrees north of east30sSTEM_GP12V-Ia-9
- Q12Given two vectors Vector A: 5 units at an angle of 30 degrees east of north, and Vector B: 10 units due east. What is the resultant vector upon addition?10.66 units at an angle of 28.07 degrees north of east13.54 units at an angle of 16.21 degrees north of east8.66 units at an angle of 45 degrees north of east15 units at an angle of 30 degrees north of east30sSTEM_GP12V-Ia-9
- Q13Given a vector with magnitude of 5 unit and angle of 30 degrees from the x-axis (counterclockwise direction), what is the component form of the vector?(0, 5)(2.5, 4.33)(4.33, 2.5)(5, 0)30sSTEM_GP12V-Ia10
- Q14A vector has a magnitude of 10 units and points at an angle of 60 degrees above the positive x-axis (in the counter-clockwise direction). What is the component form of this vector?(0, 10)(5, 8.66)(8.66, 5)(10, 0)30sSTEM_GP12V-Ia10
- Q15A car travels in a straight line at an initial speed of 5 m/s. It then accelerates uniformly to a speed of 15 m/s over a time period of 10 seconds. What is the car's average acceleration during this time?2 m/s^20.5 m/s^21.5 m/s^21 m/s^230sSTEM_GP12Kin-Ib12