Physics Exam: June Friday July 30 morning,
An Outline

Updated June 26 2008 PM

• Light & Geometric Optics: Chapters 10 & 11
• Forces & Motion: Chapters 1, 2, & 3
• Newton's Law's Forces; Chapters 4 & 5
• Work Energy & Power: Chapters 7 (8)
• Magnetism, Electromagnetism, Motors Generators & Transformers: Chapters 16, 17, & 18
• Waves & Sound: Chapters 13, 14

Exam format with a list of review words and concepts Click Here

Sample exam questions are at the end: 35 questions GO!

A look at each in a touch of depth

Do make sure you use your text book. All the information is there.

Light & Optics

1. Sources, transmission and reflection of light
2. Refraction. Make sure you are aware of
   
   1. Index of refraction
   2. Critical angle
   3. Lateral dispersion
   4. Using Snell's Law
3. Lenses
   1. Concave and convex lenses
   2. Using the formulae to sove lens problems
   3. Drawing scaled accurate ray diagrams. Make sure you can do this; exam stuff here folks.
   4. Uses of each lense
   5. Image properties when refracted by each type of lens.
4. Optical instruments; the telescope, microscope

Motion & Forces

1. Displacement, velocity and acceleration
2. Velocity and related equations
3. Newton's three Laws.
4. The F = ma equation
   
5. Working with a vector diagram; thr free body diagram

Work, Energy & Power and Machines

1. Work, forms and equation W = Fd
   Remember work and energy are very similar, both have the same units the Joule
2. Definition of heat, energy, temperature,
3. What is specific heat capacity
   Working with the equation
4. Principle of heat flow or transfer
5. Methods of heat transfer is solids or fluids
6. Gravitational potential energy P.E. = mgh
7. Kinetic energy K. E. = 1/2 mv²
8. Energy transforms and conservation
9. Power P = w/t
10. Machines, the lever, the pulley, mechanical advantage
    The lever formula, how a pulley trades distance for force etc.
11. Efficiency of a machine and where power is lost.

Magnetism

1. What is a magnet, elements that are magnetic
2. Properties af a magnet, field lines around a magnet, properties and flow direction
3. Magnetic filed that surrounds a current flowing through a conductor.
   The first of the Right-Hand Rules.
   Remember: right hand rules are for current flow; left hand rules are for electron flow.
4. The electromagnet; construction and field direction The second right-hand rule
   Characteristics that increase the electromagnets filed strength
5. The electic motor or the motor principle
   The third right-hand rule
6. Induced current in a conductor when a magnetic is moved in the visinity of a conductor.
7. The transformer; step-up and step-down
   Know how turn wrappings change the induced voltage.

Waves and Sound

1. What is a wave and what are its properties
   Frequency, wavelength, period and velocity, make sure you know the symbols and units of each.
2. Check out each of the seven study modules
   Listing them here should not be needed. You just completed these and they are on the Internet for your viewing.
   Guitar questions are on the exam.
3. Very few math problems from this section
   Speed of sound formula, don't forget 0.59
   Number of beats related to frequency difference.

Sample questions

1. Sketch a diagram of a convex lens with a focal length of 5.0 cm and the object is 4.0 cm from the center of the lens.
2. Explain the difference between a step-up & a step-down transformer.
3. What is meant by the term "Specific Heat Capacity"?
   How could you find the specific heat capacity of a block of metal? Outline the steps.
4. If a G note has a frequency of 380 Hz, what is the frequency of a note one octave below this?
5. Do you remember the "hang-time" question? I sure hope so.
6. A car accelerates at 5.0 m/s² from rest for 4.2 s. What speed will this car attain and how far will this car travel?
7. Sketch a diagram of a lever where the fulcrum is palced 50 cm from one end. If the load to be moved is 4.5 kg, what effort must be applied if the lever is 200 cm in length. Assume that the effort is at the other end.
8. What is the speed of sound at 15.7^oC?
9. Explain the motor principle.
10. If a force of 45 N acts on a 56 kg object, moving it a distance of 1.23 m, what is the net acceleration on this object?
11. Discuss the properties of an image formed by a concave lens.
12. List the three laws or rules of refraction.
13. How much heat is absorbed by 125 g of water when it is heated from 5.5^oC to 17.5^oC?
14. Draw a diagram of a step down transformer that drops the voltage from 120 V to 20 V.
15. To increase the strength of an electromagnet you could .... 3 possible answers.
16. If it takes 2.6 s to raise a 12.8 kg object a distance of 2.8 m, what is the power needed to lift this object?
17. If the length of an open guitar string is 65 cm and the frequency of this string is 156 Hz. what is the frequency of a note played on this string if the length is reduced to 48 cm?
18. State Lenz's Law.
19. Applying the right hand rule to
    1. a single wire carrying a current
    2. a current carrying helix
    3. which way a wire will move in a magnetic field
    4. current flow when a magnet is inserted or removed from a helix
20. What is a domain and why can cobalt be made into a magnet whereas zinc cannot?
21. How long will it take a billard ball to come to rest if its initial velocity is 16.5 m/s if the acceleration is -2.8 cm/s²?
22. If the critical angle for a fluid is 43.2^o determine the index of refraction for this fluid.
23. Explain this picture
    

24. What acceleration must a rocket develop to attain a speed of Mach 5.50 in 15 seconds if it is fired from an aircraft with a speed of 290 m/s.
25. A 2.5 cm object is placed 6.0 cm from a converging lens of focal length 4.5 cm. Find the position and size of the image produced.
26. A farsighted person has a near point that is 60.0 cm from his eyes. Wearing glasses enables him to read print that is at a distance of 35 cm.
    Find the focal length of the glasses if they are worn 2.25 cm away.
    Calculate the power of the lenses.
27. Sketch a diagram of a compound microscope.
28. A 6.6 kg block is attached to a 13.4 kg block by a taut string. A force of 42 N[E] is applied to the 13.4 kg block. Calculate the force of tension in the string. Ignore friction
    If stuck see page 117.
29. Jimi pulls his 12.6 kg amplifier across a floor by a rope making at 13.45 to the horizontal or floor. If he pulls the amplifier 23.4 m, how much work does Jimi do?
    Determine the angle at which the amplifier would just be lifted off the floor. Ignore friction when doing this question.
30. Be able to assign field direction, magnetic pole designation, current flow, and direction of a moving wire, to various diagrams.
31. Explain diamagnetism, paramagnetism, and ferromagnetism
32. An electromagnet that contains 700 turns exerts a lifting force of 400 N when a current of 3.5 A is applied. What force could be exerted if the number of turns is reduced to 500 and the current increased to 10.5 A ?
33. If an object is 12.3 cm from a convex lens that has a focal length of 6.0 cm determine the position of the image.
34. How much energy is required to throw a 1.25 kg object 4.56 m straight up? Also, calculate the initial velocity that this object must be thrown to achieve this height.
35. A 4.5 kg is placed on an inclined plane. If the coefficient of static friction between the object and the inclined plane is 0.35, calculate the maximum angle to which this plane can be lifted so that the object does not slide.

Answers to select Numerical Problems