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Physics past paper_Waves (Example)

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Section 3 Waves Revision Questions and Answers Q1:¬†¬†The¬†diagram¬†represents¬†the¬†electromagnetic¬†spectrum. Gamma-rays X-rays Ultraviolet Visible Infra-red Microwaves Radio waves (a)¬†¬†Which¬†of¬†X-rays¬†and¬†radio¬†waves¬†has¬†the¬†longer¬†wavelength? ANS.- Radio waves (b)¬†¬†Which¬†of¬†X-rays¬†and¬†radio¬†waves¬†has¬†the¬†higher¬†frequency? ANS. -X-rays (c)¬†¬†State¬†one¬†use¬†of¬†X-rays. ANS. - Observing internal structure of objects/ medical applications - Looking at bones/ body scans (d)¬†State¬†one¬†property¬†that¬†all¬†electromagnetic¬†waves¬†have¬†in¬†common. ANS. -Same speed -Travel in a vacuum -Both transverse -Can be polarized. (e)¬†¬†State¬†the¬†law¬†of¬†reflection. ANS. Angle of incidence = angle of reflection or incident and reflected rays and normal all in same plane (f)¬†¬†A¬†teacher¬†wants¬†to¬†demonstrate¬†the¬†law¬†of¬†reflection¬†to¬†his¬†class. Suggest¬†two¬†reasons¬†why¬†he¬†should¬†use¬†visible¬†light¬†rather¬†than¬†X-rays. ANS. ‚Äď Visible ora - X-ray are dangerous ora - Equipment not readily available ora Q2: The diagram shows an example of an analogue signal and an example of a digital signal. Complete¬†the¬†sentences. (a)The¬†analogue¬†signal¬†varies continuously¬†between¬†a¬†maximum¬†and minimum¬†value. (b)The¬†digital¬†signal¬†only¬†has¬†two¬†values.¬†¬†These¬†are¬†1¬†which¬†corresponds¬†to¬†ON and¬†Zero which¬†corresponds¬†to¬†OFF. Q3: (a)¬†Astudent¬†uses¬†a¬†rectangular¬†glass¬†block¬†to¬†determine¬†the¬†refractive¬†index¬†of¬†the glass. Describe¬†the¬†experiment.¬†¬†Draw¬†a¬†diagram¬†to¬†illustrate¬†your¬†answer. ANS. Any of the following Glass block (placed) on a suitable background Either use of ray box or use of pins and eye Position of block and rays marked or shown on 3 (i) State the relationship between i r and refractive index n.(ii) Calculate a value for refractive index using set 1. Refractive index = sin 50/ sin30=1.532 (iii)State why set 2 give a less reliable value. The angles are small and difficult to measure accurately. Q27:¬†¬†The¬†diagram¬†shows¬†a¬†waveform¬†on¬†an¬†oscilloscope¬†screen. The time base is set at 0.02s per division. Determine the frequency of this wave and give its unit. Frequency =1/0.02=50Hz A teacher demonstrated a method for determining the speed of sound. He hit two metal together to produce a sound. The sound was detected by two microphones connected to oscilloscope. The screen of the oscilloscope showed two signals A and B corresponding to the sound received by the two microphones. The¬†time¬†between¬†the¬†signals¬†was¬†0.002s¬†and¬†the¬†distance¬†between¬†the¬†microphones was¬†0.680¬†m. (i) Calculate¬†the¬†speed¬†of¬†sound¬†in¬†m/s. Frequency = 2/0.002=1000Hz wavelength = 0.680m Using v¬†=¬†f¬†őĽ Speed¬†=¬†680 m/s (ii)¬†¬†State¬†which¬†property¬†of¬†a¬†sound¬†wave¬†is¬†represented¬†by¬†the¬†amplitude¬†of¬†the signals. Loudness. (iii)¬†¬†Suggest¬†an¬†explanation¬†for¬†the¬†relative¬†sizes¬†of¬†the¬†amplitudes¬†of¬†A¬†and¬†B. The tow metals produced sound of two different volumes. A is louder than B. [...]

Order Description:

Attached pdf document ‚Äúsection-3-wave.pdf‚ÄĚ contains approx. 26 Questions from past IGCSE Physics Past Paper (IGCSE is UK exam, aimed at approximately 16 year old teenager, it is a High School Exam at pre-A level, Pre-University level. I need perfect model answers for all the questions. Noted that for most of the questions, the examiner report or marking scheme is already attached. Thus part of your effort is as simple as copying the answer into the appropriate place. Yet, the marking scheme is in points forms, not full sentence. There no drawing or further explanation. I also attached a WORD document ‚Äúsection-3-wave.doc‚ÄĚ. This word document is derived from pdf using PDF to WORD conversion software. (Warning: if discrepancy between pdf version and word version, please refer to pdf which is the source‚ÄĚ JOB: ‚ÄĘ The writer should write perfect model answers for all the questions. ‚ÄĘ The answers should be typed into the WORD document ‚Äúsection-3-wave.doc‚ÄĚ. ‚ÄĘ Drawing and special formula cannot be typed easily should be made using either powerpoint or other drawing software. However, the completed drawing relevant to the answers of that specific questions should be converted to JPEG and insert (embedded) into the same word document. ‚ÄĘ The typed answers should be typed using BLUE FONT (keeping the question as BLACK FONT) Notes 1. It is high school Physics only 2. USD 200 is offered for the answers 3. Extra 100 is offered for efforts in formatting the answers (blue fonts) and embedded the answers into the WORD document. 4. TOTAL OFFER is thus USD 300. 5. The final outcome is that: the student will read through the ‚ÄúSINGLE‚ÄĚ WORD document ‚Äúsection-3-wave.doc‚ÄĚ for revision, where there are BOTH questions (in black) and MODEL ANSWERS (in BLUE words, full sentences as appropriate, and drawing jpeg) and Marking schemes (for some questions) 6. This is make the student very easy to revise the topics. 7. The reasons I convert the PDF to WORD document is that I found most writer very difficult to write on the PDF. WORD is easier to insert answers and insert drawing, etc. 8. SOME questions from different years past paper are very similar. You should write answers for all questons even there will be some repetition as some questions are very similar.

Subject Area: Physics

Document Type: Paraphrasing

This project has already been completed by one of the Studybay experts. The client rated this project:

Project's rating is 5/5

Price $75

Words 2750

Pages 10

Completed in 5 days

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Client Review

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01.23.2017

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