Exam 9: Mass and Mass-Related Variables in Engineering

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Which of the following statements best describes what mass is?

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An aluminum cylinder is 5cm long and has a mass of 42g . If aluminum has a density of 2700kg/m32700 { \mathrm { kg } } / \mathrm { m } ^ { 3 } , how long is the cylinder?

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What does L stand for in the following equation? L=mvL = m v

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What is the momentum of a 2kg hockey puck that slides at 20 m/s20 \mathrm {~m} / \mathrm { s } across an icy lake? a. 0.1kgms0.1 \frac { \mathrm { kg } \cdot \mathrm { m } } { \mathrm { s } } b. 10kgms10 \frac { \mathrm { kg } - \mathrm { m } } { \mathrm { s } } c. 40kgm s40 \frac { \mathrm { kg } m } { \mathrm {~s} } d. None of the above

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A roll of aluminum foil from the grocery store is 12 inches wide by 75 feet long (if you unroll it). If the foil is 0.006 inches thick, and the specific weight of aluminum is 26460 N/m326460 \mathrm {~N} / \mathrm { m } ^ { 3 } , How much does the roll of aluminum foil weigh?

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A roll of aluminum foil from the grocery store is 25 centimeters wide by 25 meters long (if you unroll it). If the roll of foil has a mass of 2.8kg and the density of aluminum is 2700kg/m32700 { \mathrm { kg } } / \mathrm { m } ^ { 3 } , What is the thickness of the aluminum foil?

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A truck and a motorcycle are moving with the same momentum. Which has the greater kinetic energy?

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The SI unit for momentum is a. ms\frac { m } { s } b. ms2\frac { m } { s ^ { 2 } } c. kgms2\frac { \mathrm { kg } \cdot \mathrm { m } } { \mathrm { s } ^ { 2 } } d. kgms\frac { \mathrm { kg } \cdot \mathrm { m } } { \mathrm { s } }

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The SI unit for density is a.  g/cm3\text { } g / \mathrm { cm } ^ { 3 } b. g/ml\mathrm { g } / \mathrm { ml } c. kg/liter\mathrm { kg } / \mathrm { liter } d. kg/m3\mathrm { kg } / \mathrm { m } ^ { 3 }

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The physical quantity of momentum is a vector quantity (has direction).

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A roll of aluminum foil from the grocery store is 25 centimeters wide by 25 meters long (if you unroll it). If the foil is 0.1 millimeters thick, and the density of aluminum is 2700kg/m32700 { \mathrm { kg } } / \mathrm { m } ^ { 3 } , what Is the mass of the roll of aluminum foil?

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What happens to the density of a marshmallow when you squeeze it?

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Specific gravity is a fundamental dimension.

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A block of unknown metal has the following dimensions: 1 cm×1 cm×3 cm1 \mathrm {~cm} \times 1 \mathrm {~cm} \times 3 \mathrm {~cm} . The block's mass is 27g . What is the density of the block? a. 9kg/m39 { \mathrm { kg } } / \mathrm { m } ^ { 3 } b. 90 kg/m390 \mathrm {~kg} / \mathrm { m } ^ { 3 } c. 900kg/m3900 { \mathrm { kg } } / \mathrm { m } ^ { 3 } d. 9000k kg/m39000 { k \mathrm {~kg} } / \mathrm { m } ^ { 3 }

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What happens to the volume of a marshmallow when you squeeze it?

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The amount of mass that flows through something per unit of time is called

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The SI unit for specific volume is a. g/cm3g / \mathrm { cm } ^ { 3 } b. ml/gm l / g c. kg/k g / liter d. m3/kgm ^ { 3 } / \mathrm { kg }

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Which has more influence on a moving object's momentum?

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Inertia is a fundamental dimension.

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Mass flow rate is a fundamental dimension.

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