Category: Physics

What is an example of contraction? A contraction is a word made by shortening and combining two words. Words like can’t (can + not), don’t (do + not), and I’ve (I + have) are all contractions. They’re so common that movies and books often try to make characters seem old-fashioned or strange by having them […]

What does it mean when an object does not slip? It means the object moves uniformly in one direction along the surface, with no angular velocity about the object’s own center of mass. What does it mean when a ball rolls without slipping? Rolling without slipping is a combination of translation and rotation where the […]

What percentage of drug research is funded by the government? For the first time in the post–World War II era, the federal government no longer funds a majority of the basic research carried out in the United States. Data from ongoing surveys by the National Science Foundation (NSF) show that federal agencies provided only 44% […]

How do I know if my refrigerator condenser is bad? Although a broken compressor is just one common problem with refrigerators, it can also be one of the most often overlooked, too. Your compressor kicking on and off is what you hear (or don’t hear) at various points during the day – you hear a […]

What are some interesting facts about the Alpine biome? It is cold, snowy and windy. It is usually below freezing at night. Alpine biomes are located on mountains. They are below the snow line…. Quick Facts Location on mountains; above 10,000 feet Area of coverage 16% of earth’s surface 31,510,000 square miles (81,610,000 square kilometers) […]

What do the arrows in a food chain represent quizlet? Food chains show which organisms eat other organisms. The arrows represent the direction of the transfer of energy from one organisms to the next. What causes the arrows to move in this direction? The earth’s rotation causes a phenomenon called Coriolis effect. The lower latitudes […]

Which angle of light will heat the wood the most? 90° angle Why can you see objects placed under a heat lamp which emits infrared radiation? Infrared waves have longer wavelengths than visible light and can pass through dense regions of gas and dust in space with less scattering and absorption. Thus, infrared energy can […]

What do you mean by hydraulic? Hydraulics (from Greek: Υδραυλική) is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. In its fluid power applications, hydraulics is used for the generation, control, and transmission of power by the use of pressurized liquids. Where are hydraulic […]

How does a person move forward during swimming? A person applies force on the water in backward direction and water according to the third law of motion water apply an equal and opposite force in the forward direction which helps a person to swim. How do swimmers reduce drag? Here are ten good ways to […]

Is parsec is a unit of Time? Unfortunately, like the similarly misused ‘light-year’, the parsec is a unit of length, not of time. A parsec is equal to about 3.26 light-years or roughly 31 trillion kilometres (19 trillion miles). The unit has its origins in one of the first methods of determining the distance to […]