Views: 2262 Posts: 0 Started By: oladamats Last Poster: ericyoung Last Post Date: Apr 20, 2018

 April 19, 2018 ( Post 1 ) We Already Have The Question, All You Need To View It Bring More Of Y our Friends And We Would Post it Physics SOLUTIONS Physics OBJ 1. DABBDCABDB 11 ACCCDDBDDD 21 DBAACADCBB 31 CCBBCCBDBD 41 BDCDCADBDC PHYSIC ANSWER (1a) Strain can be defined as the ratio of extension per unit length Strain=extension/length (1b) Strain=extension/length Let original length=L Final length=2L Extension=2L-L=L Strain=L/L=1 ===================== 4a) Satellite are used for monitoring weather conditions 4b) i)Rockets are used for space travel ii)military uses, iii)launching satellites into space ===================== ============= ===================== ===================== 5a) i)They are used In making electric motors ii)They are used In making radio loud speaker iii)They are used In making aerial transistors iv)They are used In making DC dynamo 5b) Range = u√Ç¬≤Sin2tita/g At maximum range√Ç¬Ý Sin2tita = 1 2tita =sin^-1(1) 2tita = 90dgrees√Ç¬Ý Tita = 90/2 = 45degree Maximum height reached = u√Ç¬≤sin√Ç¬≤tita/2g =u√Ç¬≤(sin45)√Ç¬≤/2g =200√Ç¬≤(sin45)√Ç¬≤/2(10) =40000(1/√¢ÀÜ≈°2)2/20 =40000(1/2)/20 =20000/20 =1000metres. ======================== (6) Given constant = 2.9√É‚Äî10^-3mk Temperature = 57degreeC = (57+273)k = 330k Using landamaxT = constant√Ç¬Ý landamaxT330 = 2.9√É‚Äî10^-3 landamax = 2.9√É‚Äî10^-3/330 landamax = 8.788√É‚Äî10^-6m The speed of electromagnetic wave, v = 3√É‚Äî10^8m/s Using V = f landa f = v/landa =3√É‚Äî10^8/8.788√É‚Äî10^-6 =3.4√É‚Äî10^13Hz ======================== 7a) LASER stands for light amplification by stimulated Emission of Radiation b). A laser is a device that emits a beam of coherent light through an optical amplification process ======================== 10a) Diffraction refers to various phenomena that occur when a wave encounters an obstacle or a slit. It is defined as the bending of light around the corners of an obstacle or aperture into the region of geometrical shadow of the obstacle. 10bi the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected. ======================== (12a) This is defined as the amount of energy that must be supplied to a nucleus to completely separate it's nuclear particles (nucleons) (12b) (i) They have short wavelength and high frequency. (ii) They are highly penetrating. (iii) They travel in straight lines. (iv) They don't require material medium for their propagation. (12c) -It is used in production of electricity. -It is used to study and detect charges in genetic engineering. -It is used in agriculture. -It is used in treatment of cancer. (12di) E = hf-hfo but f = v/landa E= v/landa.h - wo Where wo = hfo = work function f= frequency landa = wavelength Hence hf = hfo - E f = hfo - E/h f = wo - E/h Recall; that v = f landa Therefore f = v/landa = 3√É‚Äî10^8/4.5√É‚Äî10-7 =3/4.5 √É‚Äî 10^8+7 =6.6√É‚Äî10^14Hz f = 6.6√É‚Äî10^14Hz (12dii) E = hf =6.6√É‚Äî10^-34 √É‚Äî 6.6√É‚Äî10^14Hz =43.56√É‚Äî10^-20J (12diii) Energy of the photoelectron E = hf - vo =Energy of incident electron - work function =4.356√É‚Äî10^-19J - 3.0√É‚Äî10^-19J =1.356√É‚Äî10^-19J ======================= So Sorry For The Error Respone On Server Lately , 99% loading...... [social] Loading......99% If I dont See You Coming In Here For More, I Would Only Post More If We Hit 650 Views,So Start Sharing Or Likes Us Or Follow Us Above , Let Me See How Serious You Are Here +++++++++++++++++++++++++++++ As you know Loadedbaze never disappoint when it comes to serving 100% correct expo. We are at it again for Waec 2018 You Want Fast Answers, Invites More Of Your Friends Share it Let Friends Know