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Test your basic knowledge |
DSST Physics
Start Test
Study First
Subjects
:
dsst
,
science
Instructions:
Answer 28 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Is the flow of charge. The SI unit of current is the Amp. [A]. In mathematical terms we can describe the __ __ as the rate of change of charge with time. (I = dQ/dt.)
Power
Acceleration
Electric current
Coulomb's Law
2. Is when heated particles transfer heat to another substance - such as cooking something in boiling water.
instantaneous acceleration
Ohm's Law
Acceleration
Convection
3. Is a discipline of thermal engineering that concerns the generation - use - conversion - and exchange of thermal energy and heat between physical systems. __ __ is classified into various mechanisms - such as thermal conduction - thermal convection -
Heat
Inertia
Heat transfer
Momentum
4. Is the resistance of any physical object to a change in its state of motion or rest - or the tendency of an object to resist any change in its motion.
Potential energy
Inertia
work
Coulomb's Law
5. Of an object helps define how that object's temperature responds to absorbing or transmitting heat. __ __ is defined as the change in heat divided by the change in temperature.
Refraction
heat capacity
Convection
Coulomb's Law
6. Is the bending of light rays when they cross an interface between two materials with different __ indices. For example - when light passes from air into the water at an angle - the light ray will bend toward the normal to the surface.
Refraction
Heat energy
average acceleration
Conduction
7. Is defined as the rate at which work is done. If we replace the eqn for work - W=F.ds in (1) the power - the power is then P=F.(ds/dt) - we recognize that ds/dt is the average velocity - v therefore - work is also -P=F.v.
Power
Acceleration
instantaneous acceleration
work
8. Is when heat flows through a heated solid.
Ohm's Law
Conduction
Newton's 1st Law (Intertia)
Momentum
9. Is when heat is transferred through electromagnetic waves - such as from the sun. __ can transfer heat through empty space - while the other two methods require some form of matter-on-matter contact for the transfer.
Radiation
Circular Motion
instantaneous acceleration
kinetic energy
10. Is the same as stored energy. The 'stored' energy is held within the gravitational field. When you lift a heavy object you exert energy which later will become kinetic energy when the object is dropped. A lift motor from a roller coaster exerts __ __
Heat transfer
Potential energy
Net force
Power
11. The __ __ is the ratio between the change in velocity and the time interval.
Coulomb's Law
Current
Potential energy
average acceleration
12. Is the 'force-displacement product' (for those of you who prefer algebra) W = F?s cos ? or the 'force-displacement path integral' (for those of you who prefer calculus).
heat capacity
Coulomb's Law
Heat
work
13. An object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
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14. Is defined as the mass multiplied by the velocity. p= mv. Since the momentum depends on the velocity - it is also a vector quantity. The units for momentum are [kg.m.s-1]
Momentum
Electric current
laws of thermodynamics
Potential energy
15. Define how heat transfer relates to work done by a system and place some limitations on what it is possible for a system to achieve.
kinetic energy
Newton's 1st Law (Intertia)
laws of thermodynamics
work
16. Is one of the basic ideas of electricity in physics. The law looks at the forces created between two charged objects. As distance increases - the forces and electric fields decrease. This simple idea was converted into a relatively simple formula. Th
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17. Is measured in amperes or amps for short. We use the symbol 'I' in the formula to represent current. (The reason for using 'I' rather than 'C' - is that 'C' is already used for something else.)
Electric current
Ohm's Law
Inertia
Current
18. An __ __ is the change in velocity at one moment.
Coulomb's Law
Momentum
instantaneous acceleration
Electric current
19. The force of __ always acts between pairs of bodies and is proportional to their masses. However - the force of __ also depends on the distance between the two bodies. As the two bodies are moved further apart - the __ational force between them decre
gravity
Heat transfer
Conduction
Heat
20. H is the sum of all forces acting on an object. For example - in a tag of war - when one team is pulling the tag with a force of 100 N and the other with 80 N - the net force would be 20 N at the direction of the first team (100 N - 80 N = 20 N).
heat capacity
Net force
mechanical equivalent of heat
Electric current
21. Is the form of energy which transfers this energy from one body or system to another. This heat transfer can take place in a number of ways: convection - conduction - and radiation.
Convection
Heat energy
Refraction
Heat transfer
22. ___ shows the change in velocity in a unit time. Velocity is measured in meters per second - m/s - so acceleration is measured in (m/s)/s - or m/s2 - which can be both positive and negative.
Current
Acceleration
Refraction
Power
23. Is a form of energy which is held in matter by the constant jostling of its particles. __ is an effect of the movement of particles. Particles transfer __ between one another by colliding with one another - and over time this will cause heat to flow
Heat
average acceleration
Heat transfer
Convection
24. Is when two items that are in thermal contact no longer transfer heat between them.
Conduction
Heat
Thermal equilibrium
work
25. Says that there is a relationship between these three factors. So if you know two of the values you can easily work out the third one.
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26. A body that travels an equal distances in equal amounts of time along a circular path has a constant speed but not constant velocity. This is because velocity is a vector and thus it has magnitude as well as direction
Net force
average acceleration
Circular Motion
laws of thermodynamics
27. A concept that had an important part in the development and acceptance of the conservation of energy and the establishment of the science of thermodynamics in the 19th century.
Radiation
Acceleration
mechanical equivalent of heat
average acceleration
28. Is the energy of motion --it's ability to do work. The faster the body moves the more is produced. The greater the mass and speed of an object the more __ __ there will be. As the train accelerates down the hill the potential energy is converted into
Refraction
kinetic energy
Acceleration
Circular Motion