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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 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.
Power
Heat energy
average acceleration
mechanical equivalent of heat
2. Is when heat flows through a heated solid.
Conduction
Net force
Electric current
laws of thermodynamics
3. 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).
work
Coulomb's Law
Circular Motion
Power
4. 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.
average acceleration
heat capacity
gravity
Heat transfer
5. 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 -
Radiation
Heat transfer
Refraction
heat capacity
6. An __ __ is the change in velocity at one moment.
Potential energy
gravity
instantaneous acceleration
kinetic energy
7. 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
heat capacity
Thermal equilibrium
Circular Motion
Current
8. 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.
Electric current
laws of thermodynamics
work
Radiation
9. The __ __ is the ratio between the change in velocity and the time interval.
heat capacity
Newton's 1st Law (Intertia)
average acceleration
Acceleration
10. 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.
Power
Convection
Momentum
Refraction
11. 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).
Circular Motion
Net force
work
Ohm's Law
12. 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.
Acceleration
gravity
Inertia
Heat
13. 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 __ __
Potential energy
Convection
gravity
kinetic energy
14. 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
Ohm's Law
Inertia
Heat
laws of thermodynamics
15. 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.)
Conduction
Radiation
Current
Ohm's Law
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 when heated particles transfer heat to another substance - such as cooking something in boiling water.
Newton's 1st Law (Intertia)
laws of thermodynamics
heat capacity
Convection
18. 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.)
Electric current
instantaneous acceleration
Refraction
mechanical equivalent of heat
19. 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
laws of thermodynamics
kinetic energy
Potential energy
Heat transfer
20. 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
Convection
Refraction
Potential energy
21. Is when two items that are in thermal contact no longer transfer heat between them.
instantaneous acceleration
Thermal equilibrium
gravity
Conduction
22. 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.
instantaneous acceleration
Radiation
heat capacity
mechanical equivalent of heat
23. 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]
Acceleration
Coulomb's Law
Momentum
Power
24. 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.
Heat energy
instantaneous acceleration
laws of thermodynamics
Power
25. 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
laws of thermodynamics
Refraction
Circular Motion
26. 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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27. ___ 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.
Net force
Acceleration
Inertia
heat capacity
28. 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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