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## Chapter 1 The Science of Physics

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**Which of the following is an area of physics that studies**motion and its causes?a. thermodynamics b. mechanics c. quantum mechanics d. optics**Which of the following is an area of physics that studies**motion and its causes?a. thermodynamics b. mechanicsc. quantum mechanics d. optics**The symbols for units of length in order from smallest to**largest are:a. m, cm, mm, and km. b. mm, m, cm, and km. c. km, mm, cm, and m. d. mm, cm, m, and km.**The symbols for units of length in order from smallest to**largest are:a. m, cm, mm, and km. b. mm, m, cm, and km. c. km, mm, cm, and m. d. mm, cm, m, and km.**The SI base unit used to measure mass is the:a. meter b.**second c. kilogram d. liter**The SI base unit used to measure mass is the:a. meter b.**second c. kilogramd. liter**If some measurements agree closely with each other but**differ widely from the actual value, these measurements are:a. neither precise nor accurateb. accurate but not precisec. acceptable as a new standard of accuracy d. precise but not accurate**If some measurements agree closely with each other but**differ widely from the actual value, these measurements are:a. neither precise nor accurateb. accurate but not precisec. acceptable as a new standard of accuracy d. precise but not accurate**What are the basic SI units?a. meters, kilograms, hoursb.**feet, pounds, secondsc. meters, kilograms, secondsd. feet, kilograms, seconds**What are the basic SI units?a. meters, kilograms, hoursb.**feet, pounds, secondsc. meters, kilograms, secondsd. feet, kilograms, seconds**What is the speed of an object at rest?a. 0.0 m/s b. 1.0**m/s c. 9.9 m/s d. 9.81 m/s**What is the speed of an object at rest?a. 0.0 m/s b. 1.0**m/s c. 9.9 m/s d. 9.81 m/s**A dolphin swims 1.85 km/h. How far has the dolphin traveled**after 0.60 h?a. 1.1 km b. 2.5 km c. 0.63 km d. 3.7 km**A dolphin swims 1.85 km/h. How far has the dolphin traveled**after 0.60 h?a. 1.1 km b. 2.5 km c. 0.63 km d. 3.7 km**Acceleration is:a. displacement b. the rate of change of**displacementc. velocity d. the rate of change of velocity**Acceleration is:a. displacement b. the rate of change of**displacementc. velocity d. the rate of change of velocity**Which of the following units are used to measure free**fall?a. m/s b. m/s2c. m•s d. m2/s2**Which of the following units are used to measure free**fall?a. m/s b. m/s2c. m•s d. m2/s2**When there is no air resistance, objects of different**masses:a. fall with equal accelerations with similar displacements.b. fall with different accelerations with different displacements.c. fall with equal accelerations with different displacements.d. fall with different accelerations with similar displacements.**When there is no air resistance, objects of different**masses:a. fall with equal accelerations with similar displacements.b. fall with different accelerations with different displacements.c. fall with equal accelerations with different displacements.d. fall with different accelerations with similar displacements.**Which of the following is a physical quantity that has both**magnitude and direction?a. vector b. scalar c. resultant d. frame of reference**Which of the following is a physical quantity that has both**magnitude and direction?a. vectorb. scalar c. resultant d. frame of reference**A string attached to an airborne kite was maintained at an**angle of 40.0° with the ground. If 120 m of string was reeled in to return the kite back to the ground, what was the horizontal displacement of the kite?a. 110 m b. 84 m c. 77 m d. 92 m**A string attached to an airborne kite was maintained at an**angle of 40.0° with the ground. If 120 m of string was reeled in to return the kite back to the ground, what was the horizontal displacement of the kite?a. 110 m b. 84 m c. 77 m d. 92 m**Which of the following is the motion of objects moving in**two dimensions under the influence of gravity?a. horizontal velocity b. directrix c. parabola d. projectile motion**Which of the following is the motion of objects moving in**two dimensions under the influence of gravity?a. horizontal velocity b. directrix c. parabola d. projectile motion**What is the path of a projectile?a. a wavy line 2. a**parabola 3. a hyperbola 4. Projectiles do not follow a predictable path.**What is the path of a projectile?a. a wavy line 2. a**parabola3. a hyperbola 4. Projectiles do not follow a predictable path.**A piece of chalk is dropped by a teacher walking at a speed**of 1.5 m/s. From the teacher’s perspective, the chalk appears to fall:a. straight down b. straight down and backward c. straight down and forward d. straight backward**A piece of chalk is dropped by a teacher walking at a speed**of 1.5 m/s. From the teacher’s perspective, the chalk appears to fall:a. straight downb. straight down and backward c. straight down and forward d. straight backward**What causes a moving object to change direction?a.**acceleration b. velocity c. inertia d. force**What causes a moving object to change direction?a.**acceleration b. velocity c. inertia d. force**Which of the following is the tendency of an object to**maintain its state of motion?a. acceleration b. inertia c. force d. velocity**Which of the following is the tendency of an object to**maintain its state of motion?a. acceleration b. inertia c. force d. velocity**A wagon with a weight of 300.0 N is accelerated across a**level surface at 0.5 m/s2. What net force acts on the wagon?a. 9.0 N b. 15 N c. 150 N d. 610 N**A wagon with a weight of 300.0 N is accelerated across a**level surface at 0.5 m/s2. What net force acts on the wagon?a. 9.0 N b. 15 Nc. 150 N d. 610 N**The statement by Newton that for every action there is an**equal and opposite reaction is which of his laws of motion?a. first b. second c. third d. fourth**The statement by Newton that for every action there is an**equal and opposite reaction is which of his laws of motion?a. first b. second c. third d. fourth**The magnitude of the force of gravity acting on an object**is:a. frictional force b. weight c. inertia d. mass**The magnitude of the force of gravity acting on an object**is:a. frictional force b. weightc. inertia d. mass**Work is done when:a. the displacement is not zerob. the**displacement is zeroc. the force is zero d. the force and displacement are perpendicular**Work is done when:a. the displacement is not zerob. the**displacement is zeroc. the force is zero d. the force and displacement are perpendicular**Which of the following energy forms is the sum of kinetic**energy and all forms of potential energy?a. total energy b. sum energy c. nonmechanical energy d. mechanical energy**Which of the following energy forms is the sum of kinetic**energy and all forms of potential energy?a. total energy b. sum energy c. nonmechanical energy d. mechanical energy**An 80.0 kg climber with a 20.0 kg pack climbs 8848 m to the**top of Mount Everest. What is the climber’s potential energy?a. 6.94 x 106 J b. 4.16 x 106 J c. 2.47 x 106 J d. 1.00 x 106 J