Category: Physics

What is the 3 quark model for hadrons? Experiments in which electrons are scattered from nucleons have revealed that neutrons and protons are not fundamental particles but are composed of yet smaller particles, quarks. There are three quarks: up, down and strange and each has a corresponding antiquark of opposite charge. Why do we need […]

Can the speed of light change? It is a basic postulate of the theory of relativity that the speed of light is constant. This can be broken down into two parts: The speed of light is independent of the motion of the observer. The speed of light does not vary with time or place. What […]

How can I determine the order of filter? 2 Answers. The order, n of a filter is the number of reactive elements (if all are contributing.) Using the linear slope (on log-log grid) away from f breakpoint it will be 6dB/octave per order of n. An n= 4th order is 24dB/octave slope as in both […]

What is the largest dam in California? Oroville Dam Which is the first dam in the world? Lake Homs Dam How long can a dam last? 50 years How long can a dam last without maintenance? Many dams built during the 1930-70s, an era of intensive dam construction, have an expected life of 50-100 years. […]

What are examples of compare and contrast? For example, if you wanted to focus on contrasting two subjects you would not pick apples and oranges; rather, you might choose to compare and contrast two types of oranges or two types of apples to highlight subtle differences. For example, Red Delicious apples are sweet, while Granny […]

What is magma that reaches the surface called? Magma is molten rock material. As magma cools the elements within the magma combine and crystalize into minerals that form an igneous rock. Magma cools either below the surface or at the surface (magma that reaches the surface is called lava). What is it called when lava […]

Is it legal to bump the ball with two contact points? During game play, it is LEGAL to: Tip the ball over the net. Bump the ball with two contact points. What are the two types of serves? In high school and college competitive volleyball, the overhand serves are most common, and the two main […]

What diseases does nuclear medicine treat? Nuclear medicine procedures are used in diagnosing and treating certain illnesses. These procedures use radioactive materials called radiopharmaceuticals. Examples of diseases treated with nuclear medicine procedures are hyperthyroidism, thyroid cancer, lymphomas, and bone pain from some types of cancer. What jobs can you get with a nuclear medicine degree? […]

How long can heat stroke affect you? Complete recovery from heat stroke and its effects on body organs may take two months to a year. How do you treat a person with heat stroke and heat exhaustion? In most cases, you can treat heat exhaustion yourself by doing the following: Rest in a cool place. […]

What are three common defects of vision? There are mainly three common refractive defects of vision. These are (i) myopia or near-sightedness (ii) Hypermetropia or far – sightedness (iii) Presbyopia. Can eye exercises reduce myopia? While myopia eye exercises won’t cure nearsightedness, they can help a person have their best possible vision and minimize eye […]