Category: Physics

Can Bone Bend? Long bones may bend without breaking the cortex. Children’s bones can be bent to 45 degrees before the cortex is disrupted and a greenstick or a complete fracture occurs. However if the bending force is released the bone may only partially return to its pre-bent position, resulting in plastic bowing. Does vinegar […]

How do we use science in our everyday life? Science informs public policy and personal decisions on energy, conservation, agriculture, health, transportation, communication, defense, economics, leisure, and exploration. It’s almost impossible to overstate how many aspects of modern life are impacted by scientific knowledge. What are 3 benefits of science? The advantages of Science and […]

What happens when a wave reflects off a fixed boundary? The right end is held tightly; it is a fixed end. The wave reflects off this fixed end and returns as a downward displaced pulse. Reflection off a fixed end results in inversion. At what angle does a reflected waves bounce back? In a reflection, […]

Is it better to breathe through your nose or mouth when exercising? The nose also adds moisture and warmth to inhaled air for smoother entry to the lungs. Nasal breathing, as opposed to mouth breathing, has another important advantage, especially for effective and efficient exercise: It can allow for more oxygen to get to active […]

What color is the photosphere as viewed from the ground on a clear cloudless day when the sun is highest overhead? The photosphere appears bright yellow (almost white) as viewed from the ground on a clear, cloudless day. As the Sun approaches the horizon over an ocean, the photosphere appears orange-yellow and as the Sun […]

What are the 3 types of flexibility? There are considered to be three main types of stretching methods for muscle flexibility. These are static stretching, dynamic stretching and proprioceptive neuromuscular facilitation (PNF). Is being too flexible bad? By repeatedly pushing past “normal” range, you’re getting micro traumas, which can lead to more serious injury, such […]

Do atoms lose energy when they collide? To loose energy in any other way, say by collision with another atom, then that atom has to carry away the difference in energy just as the photon did. Note that a collision can also add energy by the same reasoning, as can absorbing a photon so the […]

Is Absolute Zero Possible? Absolute zero, technically known as zero kelvins, equals −273.15 degrees Celsius, or -459.67 Fahrenheit, and marks the spot on the thermometer where a system reaches its lowest possible energy, or thermal motion. There’s a catch, though: absolute zero is impossible to reach. How do you explain thermodynamics to a child? Thermodynamics […]

Are enzymes used up in a reaction? Enzymes are not reactants and are not used up during the reaction. Once an enzyme binds to a substrate and catalyzes the reaction, the enzyme is released, unchanged, and can be used for another reaction. This means that for each reaction, there does not need to be a […]

How many steps are there in critical thinking? 5 steps What are the rules for critical thinking? 11 Rules for Critical Thinking All beliefs in whatever realm are theories at some level. Do not condemn the judgment of another because it differs from your own. Read not to contradict and confute; nor to believe and […]