
Pretest in Genera Physics-1st Quarter
Quiz by Ysabel Angela Embile
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50 questions
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- Q1Which of the following is equivalent to 2.5 x 10^3 in standard notation?250.002525000.0002530s
- Q2Convert 3.75 x 10^6 seconds to minutes.6250037537.5625030s
- Q3A scientist conducted an experiment to determine the boiling point of a substance. In three trials, the boiling point was measured as 99.5°C, 99.7°C, and 99.6°C. What can be said about the accuracy and precision of the measurements?The measurements are both accurate and precise.The measurements are neither accurate nor precise.The measurements are accurate, but may not be precise.The measurements are precise, but may not be accurate.30s
- Q4Two students measure the length of a wooden stick. Student A obtains a measurement of 50.3 cm, while student B obtains a measurement of 48.9 cm. Which statement is accurate about their measurements?Student A's measurement is precise, but may not be accurate.Student A's measurement is accurate, but may not be precise.Student B's measurement is both accurate and precise.Student A's measurement is both accurate and precise.30s
- Q5A digital scale is used to measure the mass of an object. The scale displays a value of 15.7 grams. Which statement is accurate about the accuracy and precision of the measurement?The measurement is both accurate and precise.The measurement is precise, but may not be accurate.The statement cannot be determined without additional information.The measurement is accurate, but may not be precise.30s
- Q6Which type of error occurs consistently in all measurements of a certain experiment?Systematic errorHuman errorInstrument errorRandom error30s
- Q7In an experiment, a scientist measures the temperature of a liquid using a thermometer. However, the thermometer is slightly damaged and consistently reads 2 degrees higher than the actual temperature. What type of error is this?Systematic errorInstrument errorHuman errorRandom error30s
- Q8A student is conducting an experiment to measure the time it takes for a pendulum to complete one full swing. However, due to the student's inconsistent pushing of the pendulum at different intervals, the time measurements vary significantly. What type of error is this?Instrument errorHuman errorRandom errorSystematic error30s
- Q9A scientist is conducting an experiment to measure the volume of liquid in a graduated cylinder. However, the scientist accidentally reads the measurement from the wrong marking on the graduated cylinder, resulting in consistently inaccurate readings. What type of error is this?Random errorHuman errorSystematic errorInstrument error30s
- Q10A student measured the length of a pencil as 15.5 centimeters, but the actual length is 14.2 centimeters. What is the percent error in their measurement?8.456.2510.3812.1330s
- Q11Which of the following quantities is a scalar?TemperatureVelocityAccelerationDisplacementForce30s
- Q12Which of the following statements is true about scalars?Scalars have units that vary with direction.Scalars cannot be multiplied or divided.Scalars can be added or subtracted by simple arithmetic operations.Scalars can only be measured in one dimension.Scalars always have both magnitude and direction.30s
- Q13Vector addition is the process of combining two or more vectors to form a single vector. Which of the following statements about vector addition is correct?The magnitude of the resultant vector is equal to the product of the magnitudes of the individual vectors.The magnitude of the resultant vector is equal to the difference between the magnitudes of the individual vectors.The magnitude of the resultant vector is equal to the vector sum of the magnitudes of the individual vectors.The magnitude of the resultant vector is always greater than the sum of the magnitudes of the individual vectors.30s
- Q14Two vectors have magnitudes 7 and 5. The angle between them is 60 degrees. What is the magnitude of their resultant vector?√(7^2 + 5^2 - 2 * 7 * 5 * cos(60))√(7^2 + 5^2 + 2 * 7 * 5 * cos(60))√(7^2 - 5^2 + 2 * 7 * 5 * cos(60))√(7^2 + 5^2 + 2 * 7 * 5 * sin(60))30s
- Q15In vector addition, which of the following is true when adding vectors of opposite directions?The magnitude of the resultant vector is equal to the sum of the magnitudes of the individual vectors.The magnitude of the resultant vector is always zero.The magnitude of the resultant vector is equal to the product of the magnitudes of the individual vectors.The magnitude of the resultant vector is equal to the difference between the magnitudes of the individual vectors.30s