.1. Two cars start from the same place and travel in opposite directions, one at the rate of 45km/h, the other at 55km/h. How far apart will they be at the end of 6 hrs.? [2 marks] 2. A gear in a certain machine rotates at the speed of 1808 r/min. How many revolutions will it make in 9.5 min.? Round your answer to the nearest hundred. [2 marks] 3. When an object is placed 126 cm in front of a certain thin lens having focal length f, the image will be formed 245cm from the lens. The distances are related by: 1 1 1 + f 126 245 Find f. Round your answer to the nearest whole number. [2 marks] 4. The power dissipated in a resistance R through which is flowing a current I is equal to I²R. Therefore, the power in a 3650 resistor carrying a current of 0.5855A is (0.5855)²(365)W. Evaluate this power and write the answer using 3 significant digits. [2 marks]