Category: Physics

Which of the following is an example of moving properly? Answer Expert Verified. The correct answer is A- Raising and lowering the body to a 90° angle at the elbow with a flat back. Can push-ups build muscle? Pushups are a popular exercise for strengthening the core and upper body. The benefits of daily pushups […]

Is calcium 46 a stable isotope? Calcium 46 Carbonate (Calcium-46) is a stable (non-radioactive) isotope of Calcium. What is calcium 46 used for? Calcium Isotopes (mainly Ca-42, Ca-44, Ca-46 and Ca-48) are used extensively in clinical research and mainly in nutritional studies. They are used to measure calcium absorption mainly in women and children. What […]

Why do solar eclipses happen only at new moon? The Moon’s Two Shadows An eclipse of the Sun (or solar eclipse) can only occur at New Moon when the Moon passes between Earth and Sun. If the Moon’s shadow happens to fall upon Earth’s surface at that time, we see some portion of the Sun’s […]

What is an example of active solar energy? Active Solar Energy These systems typically include photovoltaic panels, collectors, voltage controllers, blowers and pumps that work together to process the sun’s usable heat. An active solar system may also have batteries that store the collected energy for later use. How do you adjust the angle on […]

Is work done at a constant speed? If an object is moving with a constant velocity, then by definition it has zero acceleration. So there is no net force acting on the object. The total work done on the object is thus 0 (that’s not to say that there isn’t work done by individual forces […]

What did the Bonus Army want quizlet? Who were the bonus army? They were a group of ex soldiers who fought in world war 1. They wanted their war bonus to be paid early because of the depression. Why is the Bonus Army important? Bonus Army, gathering of probably 10,000 to 25,000 World War I […]

What is classical mechanics in simple words? Classical mechanics deals with the motion of bodies under the influence of forces or with the equilibrium of bodies when all forces are balanced. The subject may be thought of as the elaboration and application of basic postulates first enunciated by Isaac Newton in his… How difficult is […]

What is the friction loss of 200 feet of 1.75 Hose at 200 gpm? 69.75 PSI Why is friction loss important? Friction converts mechanical energy to heat energy, so by the time water reaches the nozzle it has lost a good part of its pressure. It is the operator’s responsibility to know the friction loss […]

What is intensity level example? For example, a 90 dB sound compared with a 60 dB sound is 30 dB greater, or three factors of 10 (that is, 103 times) as intense. Another example is that if one sound is 107 as intense as another, it is 70 dB higher. See Table 2. Table 2. […]

What are disadvantages of barrier islands? The disadvantage of the barrier island shoreline is exposed to many threats, such as storm erosion, reductions in sediment longshore drift and sea level rise. many human activities interfere with these natural movements, making the islands more vulnerable. Why is it a bad idea to build on barrier islands? […]