5. A typical combustion engine is 25% efficient. Calculate the amount of thermal energy produced by a combustion engine Assume it consumes 3.5times 10^9J of chemical potential energy. (3)4. A 16.2 kg box is dropped straight down from a height of 4.0 m. Using the Law of conservation of energy determine the speed of the box the moment before it hits the ground (ignore any air resistance or friction). (4)Is the statement , "thermometers must be calibrated to ensure accuracy"true or false? True False. A compact car has a 35-L gas tank and a fuel efficiency rating of 8.1L/100km A minivan has a 70 L tank and a fuel efficiency rating of 12.9L/100km Which vehicle can travel further on a tank of gas?How much further3. A student with a mass of 59.1 kg runs 2.89 m up the Campion stairs in 2.44 s. His teacher with a mass of 100 kg runs up the same stairs in 3.89 s. Which person-has greater power? (4)PREV 848586878889909192 NEXT
