Category: Physics

Does volume change in space? There is less air pressure in space, but astronauts don’t blow up like bubbles once they leave Earth’s atmosphere, so you can safely assume that the astronaut’s volume doesn’t really change either. If the mass and the volume don’t change on the moon, you can deduce that the astronaut’s density […]

Is concrete strong in compression or tension? Concrete is a non-linear, non-elastic and brittle material. It is strong in compression and very weak in tension. It behaves non-linearly at all times. Because it has essentially zero strength in tension, it is almost always used as reinforced concrete, a composite material. Why is concrete better in […]

What is a reactant simple definition? The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is […]

What happens if 2 vectors are perpendicular? If two vectors are perpendicular to each other, then their dot product is equal to zero. What is a vector diagram? Vector diagrams are diagrams that depict the direction and relative magnitude of a vector quantity by a vector arrow. Vector diagrams can be used to describe the […]

Can frogs change gender? Frogs can change their sex even in pristine, pollution free settings. Past research suggested that male-to-female sex changes happening in frogs in suburban ponds may be caused by increased levels of estrogen released into the water. As far as they know, frogs can only change sex during their tadpole phase. What […]

How do pilots know where they are? Primarily, the “ILS,” as it is commonly known, consists of two radio beams emitted from transmitters right next to the runway. All pilots have to do is follow the beams down to 200 feet above the ground, at which point they must be able to see the runway […]

Is the movement of electrically charged particles? Electric current, any movement of electric charge carriers, such as subatomic charged particles (e.g., electrons having negative charge, protons having positive charge), ions (atoms that have lost or gained one or more electrons), or holes (electron deficiencies that may be thought of as positive particles). How does charge […]

What is the new teaching method? In the modern teaching method, curriculum teaching and planning are done keeping the learner as the primary target. Through this way, learners actively participate in the whole process to build their knowledge and sharpen their skills; this is also termed as a constructivist approach. What are the 50 innovative […]

How do you say no in professional life? Use these examples to politely say “no” to your employer and coworkers: “Unfortunately, I have too much to do today. “I’m flattered by your offer, but no thank you.” “That sounds fun, but I have a lot going on at home.” “I’m not comfortable doing that task. […]

What is an example of mechanical energy to heat energy? Rubbing your hands together converts mechanical energy to thermal energy. Turning on a light switch converts mechanical energy to electrical and radiant energy. Digesting food converts mechanical energy to chemical energy. What is the relationship between mechanical energy and heat? Mechanical energy can be converted […]