Question: During the summer Anthony found it was way too hot to be comfortable. He went out to his garage to get an old fan. The fan was spins on a metal bearing but because it is old it was slightly rusted. When he turned the fan on it spun very slow, struggling to move. He then decided to lubricate the bearing that rotates the fan blades and the fan started spinning normally. Will reducing the friction in a machine make the machine require more or less work?
Answer: less

Question: Angela and Victoria have both just given birth for the first time. While they were pregnant, both women were diagnosed with HIV, however fortunately for both women it was shown that the HIV was not transmitted to the children during the pregnancy. Angela has decided that she will still breast feed her child, while Victoria has decided to solely feed her child through baby formula. Which woman could not potentially transmit HIV to their child any longer?
Answer: Victoria

Question: Ken and Stacy are two engineers discussing their plans about what source of energy they should use to generate electricity in a new city they are helping design. Ken feels that they should use coal since it's reliable, abundant and relatively cheap. Stacy argues that they should use solar power because there is an infinite supply of solar energy. Will Stacy's plan send more or less gasses into the atmosphere than Ken's plan?
Answer:
less