Physical Sciences Grade 10 P1 March Test 2018 Paper & Memo

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Physical Sciences/P1 Downloaded from hlayiso.com.: 2018 Common Test NSC - Grade 10 INSTRUCTIONS AND INFORMATION 1 Write your name and class (for example 10A) in the appropriate spaces on the ANSWER BOOK. 2: Answer ALL the questions in the ANSWER BOOK. 3, Number the answers correctly according to the numbering system used in this question paper. 4. Leave ONE line between two subquestions, for example between QUESTION 2.1 and QUESTION 2.2. 5. You may use a non-programmable calculator. 6. You are advised to use the attached DATA SHEETS. i. Show ALL formulae and substitutions in ALL calculations. 8. Round off your final answers to a minimum of TWO decimal places. 9 Write neatly and legibly. Copyright Reserved Please Turn Over

Physical Sciences/P1 Downloaded from hlayiso.cam 2018 Common Test NSC — Grade 10 QUESTION 1: MULTIPLE-CHOICE QUESTIONS Four possible options are provided as answers to the following questions. Each question has only ONE correct answer. Choose the answer and write only the letter (A — D) next to the question number (1.1 — 1.4 ) in the ANSWER BOOK, for example 1.5 C. 1.1. The time taken for one complete wave cycle to pass a point is known as ... A frequency. B amplitude ie} wavelength. D period. (2) 1.2. The diagram below represents a longitudinal wave. ec Ww x yi Z e ° Which one of the following labels correctly indicates a trough? DOD>y <NSsc Copyright Reserved Please Turn Over

Physical Sciences/P1 Downloaded from hlayiso.com.., 2018 Common Test NSC — Grade 10 1.3. Which type of wave DOES NOT travel at 3 x 10° m.s'? Radio Gamma Sound Microwaves (2) 0VQWUY 1.4 Two sound waves, A and B, are travelling through air. Wave A has a wavelength of 4,5 m and wave B has a wavelength of 1,5 m. If the temperature of the air remains constant as the waves travel, then it can be concluded that: A The speed of A is 9 times that of B B The speed of A is 3 times that of B Cc The speed of A is 1/3 times that of B D Both waves travel at the same speed. (2) [8] QUESTION 2 Two pulses, A and B, travelling in a medium approach each other. The resulting amplitude when the two pulses meet at point Qis +2 cm. Pulse B has an amplitude of +5 cm, and is moving eastwards. The pulse length of both pulse A and B is 4 cm. 2.1 Define a pulse. (2) 2.2 What type of interference takes place at point Q? Give a reason. (2) 2.3. Determine the amplitude of pulse A. (2) 2.4 — Will the pulse length of the resulting pulse at point Q be EQUAL TO; LESS THAN or GREATER THAN 4 cm? Give a reason. (2) Copyright Reserved Please Turn Over

Downloaded from hlayiso.com,., 2018 Common Test NSC — Grade 10 Physical Sciences/P1 QUESTION 3 Study the following wave form diagram for a wave travelling at 340 m.s” in air. 3.1. How long does it take for the wave to make one complete wave cycle? (1) 3.2. Define wavelength. (2) 3.3. How many wave cycles are there between points X and Y? (1) 3.4 Calculate the frequency of this wave. (2) 3.5 Calculate the wavelength of this wave? (3) 3.6 Copy this wave diagram in your answer book. Label this wave A. 3.6.1 On this same diagram, draw a second wave with a pitch twice that of A and an amplitude that is half of A. Label this wave B. Indicate the relevant times for each wave cycle. (3) 3.6.2 How does the wave length of wave B compare to that of wave A Use LONGER THAN, EQUAL TO or SHORTER THAN. (1) [13] Copyright Reserved Please Turn Over

prysical Sciencese> DOWNIoaded from hlayiSO. COMM, 218 common test NSC - Grade 10 QUESTION 4 Bats hunt for food by sending out high frequency sound waves. The time taken for the emitted wave to return to the bat enables the bat to determine the distance of the food from it. 4.1 Write down one word for the phrase “reflected sound”. (1) 4.2 Asound wave emitted from a bat strikes a stationary object and returns to the bat after 0,01 s. Calculate how far the object is from the bat. (4) 4.3. Give areason why this sound wave produced by the bat can be called ultrasound? (1) 4.4. How does the speed of sound waves in air compare to the speed in sound waves in water? (1) [7] QUESTION 5 The following are some electromagnetic waves and their corresponding wavelengths: Electromagnetic Radiation Wavelength (m) Wave Z 5x10" X-rays 7 _ a 2x10 Ultraviolet 3x 107 Visible light 5x 10° Infra-red 4x 10° 5.1. Name one source of ultraviolet radiation. (1) 5.2. Name the radiation that is used to observe objects and people in the absence of light. (1) 5.3 Which ONE of the above waves has the highest frequency? Use the data in the table to explain. (2) 5.4 Calculate the frequency of ultraviolet light. (3) 5.5 Define a photon. (2) 5.6 Calculate the energy of a photon of x-rays. (4) 5.7 Identify the electromagnetic radiation labelled Z 1 4 TOTAL MARKS: 50 Copyright Reserved

Physical Sciences/P 1 Downloaded from hlayiso.cam, 2018 Common Test NSC — Grade 10 DATA FOR PHYSICAL SCIENCES GRADE 10 PAPER 1 (PHYSICS) GEGEWENS VIR FISIESE WETENSKAPPE GRAAD 10 VRAESTEL 1 (FISIKA) TABLE 1: PHYSICAL CONSTANTS/TABEL 1: FISIESE KONSTANTES NAME/NAAM SYMBOL/S/MBOOL VALUE/WAARDE Speed of light in a vacuum Spoed van lig in 'n vacuum Planck's constant Planck se konstante c 3,0x 10° m-s" h 6,63 x 10°" Jes TABLE 2: FORMULAE/TABEL 2: FORMULES WAVES, SOUND AND LIGHT/GOLWE, KLANK EN LIG v= fA orofv = vA E=hf orlof E=hv orof E=h© A Copyright Reserved

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Downloaded from hlayiso.com 3 rch 2018 Common Test Physical Sciences P1 4 March 2018 Common Test NSC - Memorandum NSC = Memorandum 3.6 QUESTION 5 3.6.1 5.1 Visible light’ OR sun ¥ (1) = . 5.2 Infrared ¥ (1) 2 ‘ooo 8 ame'{s) 5.3 Wave Z v Wavelength is inversely proportional to frequency. ¥ OR S Wave Z has the shortest wavelength. ¥ (2) a 54 vafav 3 f= 3x10" ) 3x 107 M arking Criteria for Wave B PA 68 er ¥ 8) 1 mark for amplitude of A double that of B 1 mark for two complete cycles of B 4 mark for ending at t= §x 104s OR 5.5 Apacket of energy found in (2) 1 mark for four complete cycles of B and 1 mark ending at t = 0,001 s (3) 56 E=Mv 3.6.2 Shorter than ~ (1) A (13) = (6.63 x10) (3x 10°) v 4x10 v QUESTION4 = 4,9725 x 1078 Jv (4) ast ‘Echo (1) 5.7 Gamma rays ¥ (1) [14] 4.2 = v OR =4 v W Bis vee TOTAL MARKS: 50 d=345x5x 108 vv d=345x0,01v = 1,725m ¥ =3,45m+ 2v = 1,725m ¥ (4) 4.3 Bats produce high frequency sound waves Y or frequency of sound waves range between 20 000 Hz and 100 000 Hz. ¥ (1) 4.4 Sound waves travel faster through water than air. v (1) [7] Copyright Reserved Please Tum Over Copyright Reserved