AccountingQueen

(3)

$16/per page/Negotiable

About AccountingQueen

Levels Tought:
Elementary,Middle School,High School,College,University,PHD

Expertise:
Accounting,Algebra See all
Accounting,Algebra,Applied Sciences,Architecture and Design,Art & Design,Biology,Business & Finance,Calculus,Chemistry,Communications,Computer Science,Economics,Engineering,English,Environmental science,Essay writing,Film,Foreign Languages,Geography,Geology,Geometry,Health & Medical,History,HR Management,Information Systems,Law,Literature,Management,Marketing,Math,Numerical analysis,Philosophy,Physics,Precalculus,Political Science,Psychology,Programming,Science,Social Science,Statistics Hide all
Teaching Since: Jul 2017
Last Sign in: 264 Weeks Ago, 3 Days Ago
Questions Answered: 5502
Tutorials Posted: 5501

Education

  • MBA.Graduate Psychology,PHD in HRM
    Strayer,Phoniex,
    Feb-1999 - Mar-2006

  • MBA.Graduate Psychology,PHD in HRM
    Strayer,Phoniex,University of California
    Feb-1999 - Mar-2006

Experience

  • PR Manager
    LSGH LLC
    Apr-2003 - Apr-2007

Category > Physics Posted 25 Aug 2017 My Price 10.00

how fuel -efficient one particular car actually is.

1. An automotive technician is skeptical of published miles -per -gallon figures and thus performs an experiment to see how fuel -efficient one particular car actually is. The car's mileage recorder is the dashboard odometer. What should the technician do to obtain the car's correct miles -per -gallon figure?

A.      Use the car's owner manual. Obtain the car's fuel tank capacity and record as Y gallons. Use the car's odometer and drive X miles. Calculate the quotient X/Y.

B.      Top off the fuel tank. Record the number of gallons as Y. Drive X miles using the car's odometer. Calculate the quotient X/Y.

C.      Top off the fuel tank. Use the car's odometer and drive X miles. Then top off the fuel tank again, recording the number of gallons as Y. Calculate the quotient X/Y.

D.      Use the car's odometer and drive X miles. Then top off the fuel tank with gasoline, recording the number of gallons as Y. Calculate the quotient X/Y.

 

2. A gardener hypothesizes that potted plants lose more water to evaporation than they absorb with their roots. The gardener also observes that no water escapes from the pot and that the plant's weight depends only on the amount of water absorbed. Which method correctly tests this hypothesis?

A.      Record the amount of water added to the pot every day for one month. Also record the humidity of the surrounding atmosphere each day with a barometer. Graph these measurements.

B.      Fill two identical buckets with the same amount of water. Use one bucket to water the plant for one month. Then compare the amount of water left in the two buckets.

C.      Weigh the potted plant with dry soil. Keep track of the total amount of water added to the pot for one month, then weigh the potted plant again once the soil is dry.

D.      Weigh a sample of the dry soil and the plant root. Record the total amount of water added to the pot in one month, then weigh new samples of the soil and of the plant root.

 

3. Which characteristic must a scientific hypothesis possess?

A.      It must be able to be proven false.

B.      It must be scientifically correct.

C.      It must contradict existing data.

D.      It must conform to an existing law.

 

4. What is a characteristic of a scientific hypothesis?

A.      It must be repeatable.

B.      It must be measurable.

C.      It must be disprovable.

D.      It must be provable.

 

5. A scientist makes a hypothesis about an observed phenomenon in nature. The scientist records and analyzes the observations. The analysis of data supports the hypothesis to be correct. Which step should come next if the scientist is to maintain a valid scientific discovery?

A.      The scientist and other scientists must perform many more tests to provide evidence for the hypothesis.  If  one carefully performed test and analysis of the data contradicts the hypothesis, the hypothesis must be re-evaluated.

B.      The scientist and other scientists must perform more tests to prove the hypothesis. If three tests are carefully performed and prove the hypothesis, then the hypothesis becomes fact

C.      The scientist and other scientists must perform many more of the tests to prove the hypothesis. If carefully -performed tests or a data analysis contradicts the hypothesis, the scientist still has a second or third chance to try to prove the original hypothesis is correct.

D.      The scientist is finished. The original hypothesis was proven and is now fact

 

6. A set of observations contains data that do not fit a hypothesis. A new hypothesis and a more accurate measurement technique are proposed to explain the data that do not fit the original hypothesis. Which course of action should the scientific community take regarding the new hypothesis?

A.      Prominent scientists should vote on whether to accept the new hypothesis.

B.      The new hypothesis should be disregarded because unexplained data is trustworthy.

C.      Scientists are not required to account for unexplained data, so the new hypothesis should be ignored.

D.      The new hypothesis should be tested using the new measurement technique to determine if it is correct.

 

7. A company claims to have built a device that multiplies input energy.What should the company do to demonstrate that their device is based on a scientific approach?

A.      The company should conduct a poll of previous customers to see if they would use the device.

B.      The company should conduct and publish a test to prove whether the hypothesis is wrong.

C.      The company should interview potential customers who would use the device.

D.      The company should show comparisons to other unrelated devices from their product line.

 

8. A pharmaceutical company claims that if sick people take their specific product, they will recover faster from their illness. The product has been tested on a thousand people.Which type of claim is presented in the scenario above?

A.      Quasi -scientific

B.      Non-scientific

C.      Scientific

D.      Pseudo -scientific

 

 

9. In Which statement about a scientific hypothesis is true?

A.      A hypothesis must be proven to be true.

B.      A hypothesis can be accepted or rejected but never proven to be true.

C.      Accepting or rejecting a hypothesis is the same as proving whether the hypothesis is true.

D.      A hypothesis must not have the ability to be proven wrong.

 

10. Which term is an explanation of a natural phenomenon that has been repeatedly tested without contradiction?

A.      Theory

B.      Hypothesis

C.      Experiment

D.      Observation

 

11. A scientist is developing a protective coating. The scientist first determines how certain atoms combine to form the coating. The scientist then determines how the bonds adhere the coating to the surface. Finally, the scientist must determine how the forces and energy are used to distribute the coating evenly. Which order correctly identifies the fields of science used in this experiment?

A.      Chemistry, Physics, Biology

B.      Physics, Biology, Chemistry

C.      Chemistry, Chemistry, Physics

D.      Biology, Physics, Physics

 

12. The volume of a sphere is (4/3)Ï€(radius) 3. What is the volume of a sphere that has a radius of 6 in? Express the result in cubic inches.

A.      55.21 in3

B.      904.78 in3

C.      25.12 in3

D.      356.21 in3

 

13. The distance between the earth's center and the sun's center is R= 150,000,000 kilometers. The circumference of a circle equation is C= 2Ï€R. How many kilometers (km) does the earth travel in space in one year, assuming the earth's orbit is circular? Round to the nearest thousand.

A.      584,040,000 km

B.      471,569,000 km

C.      365,012,000 km

D.      942,478,000 km

 

14. Which scenario depicts an example of a direct relationship?

A.      The more the resistance, the lower the current.

B.      The less you study, the harder an exam will be.

C.      The windier the weather, the faster rate at which the paint dries.

D.      The more you sleep, the less tired you are.

 

 

15. Which scenario depicts an example of an inverse relationship?

A.      As a juggler juggles balls more quickly, the greater the force he will feel on his hands.

B.      If the distance between two balls is increased, the force of attraction between them decreases.

C.      As a person gains more experience in their professional field, the more knowledgeable they become.

D.      If the value of a resistor is kept constant in a circuit, current increases with the increase in voltage.

 

16. An object of mass m is acted upon by an unbalanced force that causes it to accelerate by a. What is the object's acceleration if the mass is doubled?

A.      2a

B.      (1/4)a

C.      (1/2)a

D.      4a

 

17. After working a long day in the lab, a student rushes to the university to attend evening classes and bumps her head on the glass door leading to the parking lot while looking for her car keys. How does the force on the student's head and the force on the glass door compare?

A.      The force experienced by the student's head and glass door are not related.

B.      The student's head and the glass door experience the same amount of force.

C.      The glass door experiences a greater force than the student's head.

D.      The student's head experiences a greater force than the glass door.

 

18. What is required for an object moving in a circle with a constant speed?

A.      Zero velocity

B.      Changing average speed

C.      Zero average speed

D.      Changing velocity

 

 

19. A ball is thrown upward from the ground with an initial speed of 20 m/s. Assume that g = 9.80 m/s2

What height above the ground will the ball reach before stopping, ignoring air resistance?

A.      10.4 m

B.      20.4 m

C.      4.4 m

D.      40.4 m

 

 

20. A blue billiard ball traveling at 2 m/s hits a red billiard ball that is traveling at 1 m/s. The billiard balls bounce off each other in an elastic collision. How does the momentum change after the collision?

A.      The momentum of the blue ball increases and the momentum of the red ball decreases after the elastic collision.

B.      The total momentum of the blue and red balls remains unchanged after the elastic collision.

C.      The total momentum of the blue and red balls increases after the elastic collision.

D.      The total momentum of the blue and red balls decreases after the elastic collision.

 

 

21. Momentum = mass x velocity

A ball that has a mass of 3 kg and moves with a velocity of 2 m/s to the right hits a resting clay ball that has a mass of 1 kg. After colliding, both balls get stuck together and start moving as a single system. What is the combined velocity of both balls after the collision?

A.      0.5 m/s to the right

B.      4 m/s to the right

C.      1.5 m/s to the right

D.      6 m/s to the right

 

 

22. Assume that g = 9.80 m/s2.

A ball with a mass of 5 kg is thrown from the top of a building. It experiences an air resistance of 2 N. What is the net force acting on the ball due to gravity and air resistance?

A.      55N

B.      51 N

C.      47N

D.      49 N

 

23. A skydiver with a mass of 75 kg jumps from a plane. What is the net force acting on the skydiver after hitting terminal velocity?

A.      9.8 N

B.      294N

C.      735N

D.      0 N

 

24. Linear velocity = rotational velocity x π x diameter

A student is riding a bicycle. The diameter of the wheel of the bicycle is 50.0 cm. What is the linear speed of a point on the wheel if it rotates at the rate of 100 rotations per minute (rpm)?

A.      7,850 centimeters per minute

B.      6,280 centimeters per minute

C.      3,930 centimeters per minute

D.      15,700 centimeters per minute

 

25. Torque = forceperpendicuiar x lever arm distance

Student A and Student B are sitting on opposite ends of a lever balanced on a fulcrum. Student A weighs 120 lb and Student B weighs 96 lb. Student B sits 10 feet from the fulcrum. How far away from the fulcrum should Student A sit to attain equilibrium?

A.      10 ft.

B.      7 ft

C.      8 ft

D.      9 ft

 

26. Net force = mass x acceleration

A person applies a forward force of 40 N on a bicycle. The bicycle experiences a backward resistive force of 25 N. What is the net force if the total weight of the person and the bicycle is 140 lb?

A.      75N

B.      25N

C.      140N

D.      15N

 

 

 

27. Electrical force = electrical constant x (charge1 x charge2)/distance2

Charge q and Q have an attractive force of 0.320 N.

What is the magnitude of the new force if their distance is quadrupled?

A.      1.28 N

B.      0.02 N

C.      0.08 N

D.      0.16 N

 

28. Electrical force = electrical constant x (charge1 x charge2)/distance2

A particle with a charge of q1 is placed 3 meters from a particle with charge of q2.The particles are moved to a distance of 12 meters apart.

What is the new charge that is needed on q1 so that the force between the two particles remains the same?

A.      144 q1

B.      16 q1

C.      36 q1

D.      12 q1

E.       9 q1

 

29. Why can a bird perch on an electrical power line without experiencing a shock?

A.      The voltage along the length of the wire is very low.

B.      The potential difference across the bird's body is zero.

C.      The resistance of the bird's body is very high.

D.      The insulation on the wire protects the bird.

E.       The current in the wire is grounded to the earth.

 

30. An emergency flashlight is operated by a hand crank. After cranking the flashlight several times and pressing the switch, the flashlight shines brightly and then gradually gets dimmer. What could this flashlight use to store the energy produced from cranking it?

A.      Fuses

B.      Capacitors

C.      Transformers

D.      Resistors

E.       Diodes

 

 

31. How do fuses and circuit breakers function to prevent a circuit from overheating?

A.      They limit the total current that can flow within the circuit.

B.      They raise the overall resistance of the circuit.

C.      They lower the overall resistance of the circuit.

D.      They limit the voltage to each branch of the circuit.

E.       They limit the directions the current can flow within the circuit.

 

32. Why are safety features such as fuses necessary in some circuits?

A.      When circuits are wired in series, this can cause the electric potential to increase to dangerous levels as devices are added to the circuit.

B.      When circuits are wired in series, this can cause the resistance to increase to dangerous levels as devices are added to the circuit.

C.      When circuits are wired in parallel, this can cause the voltage to increase to dangerous levels as devices are added to the circuit.

D.      When circuits are wired in parallel, this can cause the current to increase to dangerous levels as devices are added to the circuit.

 

33. Which action can increase the attractive strength of a permanent bar magnet?

A.      Stroking it with another magnet

B.      Randomizing the domains within the magnet

C.      Tapping it with a hammer

D.      Placing it on a metal surface

E.       Heating it to a high temperature

 

34. The writing head of a computer hard drive uses current flowing through a small coil of wire to change the direction of magnetic zones on the hard disk. What effect does the current have on the hard disk?

A.      The current creates a magnetic field.

B.      The current causes interference.

C.      The current allows for superconduction.

D.      The current cancels an electric field.

E.       The current destroys magnetic propulsion.

 

 

 

 

 

35. What causes the alternating currents produced by standard generators?

A.      The coil rotates so that the magnetic field passes through it in each direction for half the time.

B.      The generator coil rotates in one direction for half of the time and in the other direction for the other half of the time.

C.      The total magnetic field produced by the generator magnet keeps increasing and decreasing.

D.      The generator coil is wound in alternating directions.

 

 

36. Two wires suspended next to each other are connected to two separate batteries. What will happen to the wires if a steady current flows in the same direction in both wires?

A.      The wires will act as a transformer.

B.      The wires will experience a current increase.

C.      The wires will exert a force on each other.

D.      The wires will remain stationary.

E.       The wires will move in the direction of the current.

 

37. A balloon charged with static electricity hangs from the ceiling by a non -conducting string. The charges on the balloon have reached equilibrium. What is detectable in the free space directly around the balloon?

A.      A magnetic field

B.      An alternating current

C.      A direct current

D.      An electric field

 

 

38. A child straps a bar magnet on top of a toy car so that the north pole of the magnet is over the front of the car and the south pole is over the back of the car. The child then rolls the car down a straight track. What is the direction of the electric field induced by the magnet if the orientation of the magnet remains unchanged throughout the trip?

A.      Always in the opposite direction of the motion of the magnet

B.      Always toward the center of the Earth

C.      Always in the direction of the motion of the magnet

D.      Always parallel to the direction of the magnet's magnetic field

E.       Always perpendicular to the direction of the magnet's magnetic field

 

 

 

39. Which change would increase the time it takes a simple pendulum to swing back and forth?

A.      Changing the size of the mass

B.      Pulling it back farther

C.      Moving it to the moon

D.      Moving it downhill

 

 

40. How would a long pendulum behave differently from a short pendulum?

A.      It would have a longer period of oscillation.

B.      It would better counteract the strong pull of gravity.

C.      It would experience less torque due to the mass on the end of the pendulum.

D.      It would ensure the pendulum will swing with simple harmonic motion.

E.       It would counteract the effects of Earth's magnetic field.

 

 

41. Which wave characteristic should a surfer compare in order to find the tallest wave to ride?

A.      Speed

B.      Period

C.      Frequency

D.      Wavelength

E.       Amplitude

 

42. Which behavior is possible for light waves but not for sound waves?

A.      Interference

B.      Polarization

C.      Reflection

D.      Diffraction

 

43. A police car with its lights on and its sirens blaring drives past a man sitting in a parked car. How does the sound coming from the siren differ from the light the man sees on the top of the car?

A.      The sound requires air in order to travel but the light does not.

B.      The sound is caused by vibrations but the light is not.

C.      The sound spreads out spherically from its source but the light does not.

D.      The sound experiences a Doppler shift but the light does not.

E.       The sound reflects off surrounding objects but the light does not.

 

44. Which single characteristic determines the color of a light wave?

A.      Reflectivity of light

B.      Refraction of light

C.      Speed of light

D.      Frequency of light

 

45. Which portion of the electromagnetic spectrum do humans see?

A.      About half of the entire electromagnetic spectrum

B.      About a quarter of the entire electromagnetic spectrum

C.      Less than a tenth of the entire electromagnetic spectrum

D.      More than three-quarters of the entire electromagnetic spectrum

 

 

46. A motorcycle speedily approaches and then rapidly passes a student standing still on the sidewalk. The motorcycle's engine is blaring loudly, and the student notices the sound frequency changes as it approaches and recedes down the street. Which statement correctly describes the perceived change in frequency?

A.      The perceived frequency of the engine is higher as it approaches the student and is at an even higher frequency when it passes and recedes.

B.      The perceived frequency of the engine is the same when it approaches the student as when it passes and recedes.

C.      The perceived frequency of the engine is higher when it approaches the student than when it passes and recedes.

D.      The perceived frequency of the engine is lower when it approaches the student than when it passes and recedes.

 

47. The first law of thermodynamics states that heat energy added to the system = increase in internal energy + work done by the system. An automobile engine produces 8,000 J of energy to move the car 100 feet During this procedure, a specific portion of gasoline from the tank is used. When burned in the cylinders of the engine, that same portion of gas produces 32,000 J of energy. What is each aspect of the first law of thermodynamics, according to the terms of this case?

A.      Heat energy added to the system = 32,000 J. Increase in internal energy = 8,000 J. Work done by the system = 24,000 J.

B.      Heat energy added to the system = 32,000 J. Increase in internal energy = 24,000 J. Work done by the system = 8,000 J.

C.      Heat energy added to the system = 8,000 J. Increase in internal energy = -24,000 J. Work done by the system = 32,000 J.

D.      Heat energy added to the system = 24,000 J. Increase in internal energy = 32,000 J. Work done by the system = -8,000 J.

 

48. Change in internal energy = heat added to system - work done by system

A person does 300 J of work on a system. The system heats the surroundings by 300 J. What happens to the internal energy of the system?

A.      It increases by 600 J.

B.      It is unchanged.

C.      It increases by 300 J.

D.      It decreases by 600 J.

 

49. How is entropy affected if there is heat exchange between a system and its environment?

A.      There will be no change in entropy.

B.      The entropy will decrease.

C.      The entropy will increase.

D.      Entropy will reach its minimum value.

 

 

50. A student drags a study table across the room. In doing this, the student changes the entropy of the room. What effect does dragging the study table have on the entropy of the room?

A.      Entropy decreases as the frictional forces pull the table down. This causes the student to do extra work to move it around.

B.      Entropy increases as the student does work against friction. This produces heat; thus transforming ordered energy into disordered energy.

C.      Entropy increases as the frictional forces pull the table down. This causes the student to do more work to move it around.

D.      Entropy decreases as the student does work against friction. This produces heat; thus transforming ordered energy into disordered energy.

 

 

51. Heat = mass x specific heat x change in temperature.

A substance that weighs 450 grams experiences a rise in temperature from 5°C to 55°C upon supplying 495 calories of heat energy. What is the specific heat capacity of the substance?

A.      9.9 cal/g °C

B.      0.022 cal/g °C

C.      1.1 cal/g °C

D.      0.15 cal/g °C

 

 

52. Heat = mass x specific heat x change in temperature.

14,152 J of heat is supplied to 200 grams of ethanol at 7°C. What is the final temperature of ethanol if its specific heat capacity is 2.44 J/g °C?

A.      36°C

B.      22°C

C.      32°C

D.      29°C

 

53. How are molecules affected when the temperature of a liquid is decreased?

A.      Molecules of the liquid attain absolute zero.

B.      Molecules of the liquid vibrate with more energy.

C.      Molecules of the liquid stop vibrating.

D.      Molecules of the liquid vibrate with less energy.

 

54. Change in internal energy = heat added to system - work done by system

Enough heat is added to a system that it increases the internal energy by 50 J and causes the system to do 500 J of external work. How much energy was added to the system?

A.      350J

B.      650J

C.      550J

D.      450J

 

 

55. Which observation indicates that light behaves as a particle?

A.      Both bulbs produce electrons at a similar rate.

B.      The 100W bulb starts producing electrons sooner.

C.      The 100W bulb produces electrons with higher energy.

D.      Both bulbs produce electrons with similar energies.

 

56. Which behavior of light demonstrates its particle -like nature?

A.      Photons passing through the output mirror in a final laser beam

B.      Photons being absorbed and emitted from atoms in a laser cavity

C.      Photons resonating between the two mirrors in a laser cavity

D.      Photons traveling to neighboring atoms in a laser cavity

 

57. Why are integrated circuits currently made from semiconductors and not other materials?

A.      Semiconductors have resistances that can be manipulated.

B.      Semiconductors can process information stored magnetically.

C.      Semiconductors behave the same at all temperatures.

D.      Semiconductors require the least amount of energy to operate.

E.       Semiconductors are the most numerous elements.

 

 

58. A chemist measures the volume of a solution by pouring it into a beaker with markings that are accurate to 0.1 mL. Why can the effects of the uncertainty principle be ignored in this measurement?

A.      The system is not on the atomic scale.

B.      Uncertainty only affects position measurements.

C.      The system contains no uncertainty.

D.      Physical interaction with the system is limited.

E.       Only one quantity is being measured at a time.

 

 

59. A charge of 5 C is moved inside an electric field until it possesses an electric potential energy of 150 J. Which voltage is generated during this process?

A.      150V

B.      100

C.      30V

D.      75V

E.       15 V

 

 

60. A glass rod is rubbed with a cloth until it reaches a voltage of 3000 V. A student touches the rod to discharge it. Why does the student experience only a slight spark?

A.      The rod's electric potential energy per unit charge is very low.

B.      The rod's electric potential energy is equal to its voltage.

C.      The rod has a very low electric potential.

D.      The rod has very little total charge.

E.       The rod's electric potential energy is very high.

 

 

61. Electric potential = electric potential energy /charge

A positive charge of magnitude q is a distance d from a large positive central charge. Another positive charge of magnitude 2q is the same distance don the other side of the central charge. Neglect the interactions between the test charges in order to answer the following question. What is the relationship between the electric potentials of the two charges?

A.      The electric potential of positive charge q is larger than that of 2q.

B.      The electric potential of positive charge 2q is larger than that of q.

C.      The electric potentials of the two particles are both zero.

D.      The electric potential of the two particles is the same.

 

 

62. A science fair contestant is constructing a simple motor. However, when the contestant switches on the current, the wire loop only makes half of a revolution and then stops. Why did this happen?

A.      The current in the experiment did not switch direction.

B.      The magnet in the experiment is not strong enough.

C.      The wire loop is not aligned properly with the magnetic field.

D.      The wire loop is not made of a magnetic material.

E.       The current in the experiment is not strong enough.

 

 

63. A science fair contestant is constructing a simple motor. However, when the contestant switches on the current, the wire loop only makes half of a revolution and then stops. Why did this happen?

A.      The current in the experiment did not switch direction.

B.      The current in the experiment is not strong enough.

C.      The magnet in the experiment is not strong enough.

 

D.      The wire loop in the experiment is not made of a magnetic material.

Answers

(3)
Status NEW Posted 25 Aug 2017 01:08 PM My Price 10.00

Hel-----------lo -----------Sir-----------/Ma-----------dam----------- T-----------han-----------k y-----------ou -----------for----------- us-----------ing----------- ou-----------r w-----------ebs-----------ite----------- an-----------d a-----------cqu-----------isi-----------tio-----------n o-----------f m-----------y p-----------ost-----------ed -----------sol-----------uti-----------on.----------- Pl-----------eas-----------e p-----------ing----------- me----------- on----------- ch-----------at -----------I a-----------m o-----------nli-----------ne -----------or -----------inb-----------ox -----------me -----------a m-----------ess-----------age----------- I -----------wil-----------l

Not Rated(0)