Problem: Rough surfaces create more friction than smooth surfaces. Thats why cars have tires. Its also why we use rubber mats in areas that might get wet. In your bathtub, you may even use No-Slip tape. No-slip is another way of saying the items has a lot of friction. In Figure 1.9, the blades of the skates are very smooth. Thats why you cant slide across ice with shoes. The soles of your shoes are much rougher than skates. The rougher surface of shoes causes more friction and slows you down. Heavier objects also have more friction. A heavy object presses down with more force. The surfaces are held together more tightly. This makes the surfaces harder to slide past each other. Did you ever try to push something heavy across the floor? Heavy objects are much harder to push than light objects.

Question: "In order to slide across ice more easily, would you want something on your feet that had a smooth surface or a rough surface?"

Answer: "A smooth surface"

OPTIONS:
- no
- yes
Answer: yes

Problem: Einstein was displeased with quantum theory and mechanics (the very theory he helped create), despite its acceptance by other physicists, stating that God "is not playing at dice." Einstein continued to maintain his disbelief in the theory, and attempted unsuccessfully to disprove it until he died at the age of 76. In 1917, at the height of his work on relativity, Einstein published an article in Physikalische Zeitschrift that proposed the possibility of stimulated emission, the physical process that makes possible the maser and the laser. This article showed that the statistics of absorption and emission of light would only be consistent with Planck's distribution law if the emission of light into a mode with n photons would be enhanced statistically compared to the emission of light into an empty mode. This paper was enormously influential in the later development of quantum mechanics, because it was the first paper to show that the statistics of atomic transitions had simple laws. Einstein discovered Louis de Broglie's work, and supported his ideas, which were received skeptically at first. In another major paper from this era, Einstein gave a wave equation for de Broglie waves, which Einstein suggested was the Hamilton-Jacobi equation of mechanics. This paper would inspire Schrodinger's work of 1926.

Question: "After discovering Louis de Broglie's work, what did Einstein give for de Broglie waves?"

Answer: "Hamilton-Jacobi equation"

OPTIONS:
- no
- yes
Answer: no

Problem: Victims of domestic violence will have access to quality legal representation through a campaign undertaken by Idaho Supreme Court Chief Justice Linda Copple Trout and corporate leaders. "Thousands of times a year, Idahoans are victims of domestic violence. The victims are often women and their children and they frequently have few resources with which to pursue their legal rights," Trout said Tuesday. "This campaign helps fill that gap in legal services for women who need the help at a time when they are in crisis." The Idaho Partners for Justice Project has already secured pledges of more than $35,000 from law firms, attorneys, corporations and individuals. The goal is $100,000. The drive to pay for free legal services will continue for the next two months. The money goes to Idaho Legal Aid Services and the Idaho Volunteer Lawyers Program. Last year, more than 5,000 petitions were filed in Idaho for protection orders in domestic violence cases. More than 12,000 victims contacted shelters or crisis hotlines. Joining Trout in the announcement was Idaho Bar Association President Fred Hoopes of Idaho Falls and Ida-West Energy Co. Chief Executive Officer Randy Hill, members of the project's executive committee. Also on hand were some women who were victims of such violence, but benefited from free legal services. Last year's campaign generated enough money and resources to help more than 450 victims. The help ranged from representation in protection order hearings to legal assistance in divorce, visitation and child support cases. The donations are tax deductible.

Question: "What kind of help did 450 victims receive last year?"

Answer: "Food stamps"

OPTIONS:
- no
- yes
Answer:
no