Category: Physics

Are roller coasters safe for the brain? The risk of traumatic brain injury (TBI) while riding roller coasters has received substantial attention. Case reports of TBI around the time of riding roller coasters have led many medical professionals to assert that the high gravitational forces (G-forces) induced by roller coasters pose a significant TBI risk. […]

Which sentence best describes mass movement? The downhill flow of soil and rock resulting from gravity best describes mass movement. The downhill flow of soil and rock resulting from gravity best describes mass movement. Which type of mass movement occurs when a fragment of rock breaks off and drops almost vertically to the ground below […]

What organs are part of the cardiorespiratory system? The cardiorespiratory system consists of the heart and blood vessels, which work with the respiratory system (the lungs and airways). These body systems carry oxygen to the muscles and organs of the body, and remove waste products, including carbon dioxide. Is 30 minutes of cardio 3 times […]

How quickly does Peat form? Peat is formed by decomposition and accumulation process of plant materials that grow on the land which is influenced by dry and wet season period. Peat formation occurs in a long period with the formation rate of about 1 mm per year (Charman, 2002), which means 1 m deep peat […]

Does the Earth revolve around the sun once a year? The Earth moves in two different ways. Earth orbits the sun once a year and rotates on its axis once a day. The Earth’s orbit makes a circle around the sun. Can we offer water to sun during solar eclipse? Or you can also offer […]

Is oxygen a donor or acceptor? Oxygen is an oxidizing agent (electron acceptor) and hydrogen is a reducing agent (electron donor). What are the best electron donors? When a really good donor meets a great acceptor, the chemical reaction releases a lot of energy. Oxygen (O2) is the best electron acceptor and is used in […]

Why does sand burn your feet? Yes, the sand heats up in the hot sun and is a common cause of burns on your feet. When it is 90 degrees outside, the sand can be over 120 degrees, hot enough to cause second and even third degree burns. So at the beach, wear Crocs, aqua […]

What is average distance? The average distance is the average shortest path of a graph, corresponding to the summa of all shortest paths between vertex couples divided for the total number of vertex couples. In quantitative terms, “high” and “low” are better defined when compared to the total number of nodes in the graph. How […]

What are examples of an unbalanced force? Practically anything that moves is a result of the exertion of unbalanced forces on it. If you kick a football and it moves from one place to another, it means that unbalanced forces are acting upon it. Ball moves from one place to another after kicking it. This […]

Is it more energy efficient to boil water? An electric stove requires more energy and time to heat up, thus it takes longer to heat the water inside the kettle. However, an electric stove is more efficient in delivering energy to the kettle. Using boiling water and vinegar removes mineral deposits that reduce its energy […]