What is the Doppler effect and why does it occur? The Doppler effect is a change in the frequency of sound waves that occurs when the source of the sound waves is moving relative to a stationary listener. As the source of sound waves approaches a listener, the sound waves get closer together, increasing their […]
What is the correct food chain?
What is the correct food chain? The process of transfer of energy from producers through a series of organisms, i.e., from primary consumers to secondary consumers and from secondary consumers to tertiary consumers by process of eating and being eaten constitute a food chain. The correct food chain is phytoplankton >> zooplankton >> fish. Are […]
How can you tell if a squirrel is mad?
How can you tell if a squirrel is mad? Those familiar with these expressive rodents know how they let their anger be known: a guttural growl, a chattering of teeth, a stamping of feet. But the key to interpreting their emotions may also lie somewhere else: in the curve of their majestic, bushy tails. Why […]
Why are room modes bad?
Why are room modes bad? Why are room modes bad? Room modes accentuate specific frequencies. When the neighbor is listening to music, and you always hear some bass notes louder than the rest of the music, it might be caused by room modes in your or your neighbors apartment. How do you calculate room mode? […]
What is the use of Sulphuric acid?
What is the use of Sulphuric acid? Sulfuric acid is also a key substance in the chemical industry. It is most commonly used in fertilizer manufacture, but is also important in mineral processing, oil refining, wastewater processing, and chemical synthesis. What are three uses of sulfuric acid? The major use of sulfuric acid is in […]
What is a spring balance Class 8?
What is a spring balance Class 8? Spring balance is a device used to measure the weight of small bodies. As the weigths are hung to the spring it stretches the the pointer indicates the weight hung or the force applied on the spring. The working principle of spring balance is Hook’s law. What is […]
What are the difference between renewable and nonrenewable?
What are the difference between renewable and nonrenewable? Nonrenewable energy resources, like coal, nuclear, oil, and natural gas, are available in limited supplies. Renewable resources are replenished naturally and over relatively short periods of time. The five major renewable energy resources are solar, wind, water (hydro), biomass, and geothermal. What is the difference between renewable […]
Why are the first 3 years of life important?
Why are the first 3 years of life important? Recent research confirms that the first five years are particularly important for the development of the child’s brain, and the first three years are the most critical in shaping the child’s brain architecture. They have a direct impact on how children develop learning skills as well […]
Does volume change in space?
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?
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 […]