Problem: Given the question: You are given a new situation: James is driving down the street in his town. For some reason today hes very curious about the things that he sees. He looks around as hes driving and the street lights catch his attention. He realizes that he's never seen someone changing the bulbs in a street light. He also wonders if its a film on the light that makes them have that color or something inside. and a hint : A vapor light produces visible light by electroluminescence. The bulb contains a small amount of solid sodium or mercury as well as a mixture of neon and argon gases. When an electric current passes through the gases, it causes the solid sodium or mercury to change to a gas and emit visible light. Sodium vapor lights, like these streetlights, produce yellowish light. Mercury vapor lights produce bluish light. Vapor lights are very bright and energy efficient. The bulbs are also long lasting. Please answer this question : Given the street lights are sodium vapor lights, will these lights have a long life or short life?
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The answer is:
long life

Problem: Given the question: You are given a new situation: Benjamin is taking an Army training class and is learning to operate a tank. Today, he is in a tank with an instructor on a training course. Benjamin drives the tank forward and comes to a large dirt mound blocking his path. He needs to decide whether to break the left tread or right tread. Eric is operating a tank in a war zone. The battlefield is filled with large debris and needs to be navigated carefully. A large wall is blocking Eric's way forward and his right side. and a hint : The refraction of waves across boundaries operates similarly to the method by which tanks are steered. Tanks do not have a steering wheel. Instead, they have an accelerator to produce forward motion and separate brakes on each tread. The operator uses brakes on both treads at the same time in order to stop, but brakes on only one tread to turn the tank. By braking one side, the operator causes that side to slow down or stop while the other side continues at the previous speed, causing the tank to turn towards the slower tread. Please answer this question : If Eric slowed the left tread would he avoid or hit the wall?
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The answer is:
avoid

Problem: Given the question: You are given a new situation: Adam wants to show his little brother a trick. He gets a bucket of water and says to him "I bet i can turn this bucket upside down and no water will fall out". His brother doesn't believe him of course. So Adam takes the bucket by the handle and quickly starts spinning it in a circle. and a hint : Centripetal force is, simply, the force that causes centripetal acceleration. Objects that move in uniform circular motion all have an acceleration toward the center of the circle and therefore, they must also suffer a force toward the center of the circle. That force is the centripetal force. For orbiting satellites, such as the moon orbiting the earth or the earth orbiting the sun, the centripetal force is produced by gravity. When an Olympic hammer thrower whirls a massive ball on a chain, the centripetal force is created by the athlete and transmitted by the chain. Please answer this question : Which is creating the centripetal force on the water, Earth or Adam?
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The answer is:
Adam