Mass and energy 1

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Mass and energy 1


Froggy Jumps Mass and energy 1Versión en línea Choose the right answer por LAURA JEZABEL GAMA GOMEZ 1 During a classroom lab activity, a student measures the length of a ramp before simulating the motion of a cart. Which fundamental concept is being applied? a Measurement of a physical quantity b Dimensional analysis c Hypothesis testing 2 When planning a trip, a student converts kilometers into miles to estimate distances. Which skill is being applied? a Vector decomposition b Unit conversion (factor–label method) c Curve fitting 3 In a motion simulator, a student enters the track length as 2.50 km, but the software operates in meters. After conversion, what is the correct way to input the value while preserving significant figures? a 2500 m b 25 × 10³ m c 2.50 × 10³ m 4 Convert 3.200 × 10³ m to miles using 1 mi = 1609 m. Express the result with three significant figures. a 1.99 mi b 1.75 mi c 2.15 mi 5 Express 0.0000048 m using an appropriate SI prefix a 4.8 nm b 4.8 µm c 4.8 mm 6 Multiply 4.52 × 3.1 applying the rule of significant figures correctly. a 14 b 14.0 c 14.012 7 Add 18.73 + 2.6 applying the decimal place rule correctly. a 21.3 b 21.33 c 21.0 8 Convert 35 mi/h to ft/s. a 42.0 ft/s b 35.0 ft/s c 51.3 ft/s 9 A student reports 0.003 m as 3 mm in an experimental report. Which conceptual tool was correctly applied? a Dimensional analysis b Use of SI prefixes c Vector resolution 10 A student measures 1.24 s, 1.28 s, and 1.26 s. The average is 1.26 s. The student reports 1.260 s. What issue does this present? a It unnecessarily reduces the number of significant figures available. b It suggests a higher precision than justified by the original measurements c It changes the fundamental unit of the International System. Underestimating random error 11 A student converts 72.0 km/h to m/s using conversion factors. What is the correct value with three significant figures? a 20.0 m/s b 19.9 m/s c 25.9 m/s 12 Convert 52 inches to centimeters. a 132 cm b 2.05 cm c 132.1 cm 13 Convert 420 m² to ft² using 1 ft = 0.3048 m. a 1378 ft² b 1378 m² c 4521 ft² 14 Convert 2.75 hours to seconds. a 9900 s b 8250 s c 7200 s 15 Convert 84 km/h to m/s using properly organized conversion factors. a 21 m/s b 23 m/s c 30 m/s 16 Add A = (6, 2) and B = (−3, 4). What is the magnitude of the resultant? a 5.83 b 6.71 c 7.21 17 Two perpendicular vectors have magnitudes of 9 N and 12 N. What is the magnitude of their resultant? a 21 N b 15 N c 10 N 18 An 18 N vector points south. What are its components? a (0, −18) N b (−18, 0) N c (0, +18) N 19 Multiply the vector v = (5, −2) by the scalar k = 3. a (15, −2) b (8, 1) c (15, −6) 20 Add A = (4, 7) and B = (−6, 3). What is the magnitude of the resultant? a 14.00 b 10.20 c 8.00 21 Determine the magnitude and direction of C = (−3, −4). a 5 at 233.1° b 5 at 306.9° c 7 at 233.1° 22 Multiply v = (−2, 5) by k = −3. a (6, −15) b (−6, 15) c (−2, −15)

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Mass and energy 1Versión en línea

por LAURA JEZABEL GAMA GOMEZ

During a classroom lab activity, a student measures the length of a ramp before simulating the motion of a cart. Which fundamental concept is being applied?

When planning a trip, a student converts kilometers into miles to estimate distances. Which skill is being applied?

In a motion simulator, a student enters the track length as 2.50 km, but the software operates in meters. After conversion, what is the correct way to input the value while preserving significant figures?

Convert 3.200 × 10³ m to miles using 1 mi = 1609 m. Express the result with three significant figures.

Express 0.0000048 m using an appropriate SI prefix

Multiply 4.52 × 3.1 applying the rule of significant figures correctly.

Add 18.73 + 2.6 applying the decimal place rule correctly.

Convert 35 mi/h to ft/s.

A student reports 0.003 m as 3 mm in an experimental report. Which conceptual tool was correctly applied?

A student measures 1.24 s, 1.28 s, and 1.26 s. The average is 1.26 s. The student reports 1.260 s. What issue does this present?

A student converts 72.0 km/h to m/s using conversion factors. What is the correct value with three significant figures?

Convert 52 inches to centimeters.

Convert 420 m² to ft² using 1 ft = 0.3048 m.

Convert 2.75 hours to seconds.

Convert 84 km/h to m/s using properly organized conversion factors.

Add A = (6, 2) and B = (−3, 4). What is the magnitude of the resultant?

Two perpendicular vectors have magnitudes of 9 N and 12 N. What is the magnitude of their resultant?

An 18 N vector points south. What are its components?

Multiply the vector v = (5, −2) by the scalar k = 3.

Add A = (4, 7) and B = (−6, 3). What is the magnitude of the resultant?

Determine the magnitude and direction of C = (−3, −4).

Multiply v = (−2, 5) by k = −3.