Sponsored Links: UNILAG 2005 21. A bus traveling at 15m s-1 accelerates uniformly at 4m s-2. What is the distance covered in 10s? Answer: _________ 22. The volume and pressure of a given mass of gas at 27 0C are 76 cm3 and 80 cm of mercury respectively. Calculate its volume at s.t.p. Answer: __________ 23. A simple microscope forms an image 10 cm from an eye close to the lens. If the object is 6 cm from the eye, calculate the focal length of the lens. Answer: _________ 24. Calculate the work done when a spring of force constant 105 N/m is extended by 0.2m Answer: __________ Suggested Answers 21. Answer: 350m 22. Answer: 72.8cm3 23. Answer: 3.75cm 24. Answer: 2000N 25. Answer: the path taken PHYSICS, UNILAG 2006 61. A piece of metal of relative density 5.0 weights 60 N in air. Calculate its weight when frilly immersed in water. Answer: _________ 62. A force acts on a body for 0.5 s changing its momentum from 16.0 kg m s-1 to 21.0 kg m s-1 calculate the magnitude of the force Answer: ____________ 63. The period of an oscillatory motion is defined as Answer: ________________ 64. A platinum resistance thermometer has a resistance of 4 Ω at 0 0C and 10 Ω at 100 0C. Assuming the resistance changes uniformly with temperature, calculate the resistance of the thermometer when the temperature is 45 0C. Answer: ________ 66. An object is placed on the principal axis and at the centre of curvature of a concave mirror, is the image of the object formed by the mirror real?. Answer: ________ 67. The direction of induced current in a straight wire placed in a magnetic field is determined by using Answer: __________ SUGGESTED ANSWERS 2006 61. Answer: 48N 62. Answer: 10.0N 63. Answer: time to complete one oscillation 64. Answer: 6.7 66. Answer: real and inverted 67. Answer: Fleming\'s right hand rule Please check to be sure. Thanks.