Category: Physics

How do you know if a nucleus is stable? The principal factor for determining whether a nucleus is stable is the neutron to proton ratio. Elements with (Z<20) are lighter and these elements’ nuclei and have a ratio of 1:1 and prefer to have the same amount of protons and neutrons. Why is iron nucleus […]

Is a 5K in 30 minutes good? Factors such as age, sex, and fitness level can influence your 5K time. Many runners complete a 5K in 30 to 40 minutes, and many runners are satisfied with their time if it’s around this benchmark. The average walker finishes a 5K in 45 to 60 minutes. How […]

What are 3 environmental factors that affect the rate of photosynthesis? Three factors can limit the rate of photosynthesis: light intensity, carbon dioxide concentration and temperature. Light intensity. Without enough light, a plant cannot photosynthesise very quickly – even if there is plenty of water and carbon dioxide. Carbon dioxide concentration. Temperature. What are some […]

How do you defog a bathroom mirror in the shower? One method to quickly defog your mirror is to use a hairdryer after your shower. This works because the heat from it will evaporate the fog. It’s best to set the hairdryer to a low heat and aim it directly at the glass for maximum […]

Why do busses stop at train tracks? It’s to make sure the driver can visualize that the tracks are clear. A bus carrying passengers or any school bus must stop within 50 feet but not less than 15 feet from the nearest rail of a railroad to look and listen for signals indicating the approach […]

What are the limits of classical physics? The classical limit or correspondence limit is the ability of a physical theory to approximate or “recover” classical mechanics when considered over special values of its parameters. The classical limit is used with physical theories that predict non-classical behavior. What are the laws of classical physics? It’s based […]

How does wind affect forest? If wind loads exceed the resistance of stem or root/soil systems, trees break (stem snap, windbreak) or uproot. These modes of failure are often lethal, but trees may survive, particularly where they are capable of resprouting. In either case, this disturbance affects stand and soil conditions. Does the weather change […]

What is the top of the water called? Bodies of water are made up of layers, determined by temperature. The top surface layer is called the epipelagic zone, and is sometimes referred to as the “ocean skin” or “sunlight zone.” This layer interacts with the wind and waves, which mixes the water and distributes the […]

What is the difference between the two types of observations? Observation involves using the senses to gather information about the natural world. There are two types of observations: qualitative and quantitative. Scientists gather information by making both qualitative and quantitative observations. Quantitative observations yield meaningful, numerical results. What are the 3 parts of observation? When […]

Can elephants hear ultrasonic sound? Elephants can communicate using very low frequency sounds, with pitches below the range of human hearing. These low-frequency sounds, termed “infrasounds,” can travel several kilometers, and provide elephants with a “private” communication channel that plays an important role in elephants’ complex social life. Can elephants hear humans? Hearing. Elephants have […]