Year: 2021

Why were pea plants used by Mendel? Mendel studied inheritance in peas (Pisum sativum). He chose peas because they had been used for similar studies, are easy to grow and can be sown each year. Pea flowers contain both male and female parts, called stamen and stigma, and usually self-pollinate. What will happen when round […]

How do you calculate the energy content of fuel? where H = heat energy absorbed (in J), ∆t = change in temperature (in °C), m = mass (in g), and Cp = specific heat capacity (4.18 J/g°C for water). Dividing the resulting energy value by grams of food burned gives the energy content (in J/g). […]

Do smaller cars go faster? What’s clear is that a lighter car will accelerate more or require less force to accelerate like a heavier car. As the acceleration is slower with a heavier car of the same power, you have to accelerate for longer (more time) to cover the same distance so you use more […]

What are the two formulas for mechanical advantage? (b) The ideal mechanical advantage equals the length of the effort arm divided by the length of the resistance arm of a lever. In general, the IMA = the resistance force, Fr, divided by the effort force, Fe. IMA also equals the distance over which the effort […]

What is an example of humans adapting to the environment? The human body readily responds to changing environmental stresses in a variety of biological and cultural ways. We can acclimatize to a wide range of temperature and humidity. When traveling to high altitudes, our bodies adjust so that our cells still receive sufficient oxygen. When […]

What are the 5 properties of light? The primary properties of visible light are intensity, propagation-direction, frequency or wavelength spectrum and polarization, while its speed in a vacuum, 299 792 458 m/s, is one of the fundamental constants of nature. What are the 5 properties of light grade 4? Light & Sound Light & Sound […]

How long do wheel hub bearings last? 136,000 to 160,000 km Do I need to replace the hub assembly or just the bearing? A major difference between the two is how they are assembled. Wheel bearings can be taken apart, lubricated and reassembled to be used again. Hub bearings are pre-packed at the manufacturer’s factory […]

Can we travel between galaxies? The technology required to travel between galaxies is far beyond humanity’s present capabilities, and currently only the subject of speculation, hypothesis, and science fiction. However, theoretically speaking, there is nothing to conclusively indicate that intergalactic travel is impossible. Why is the universe infinite? If the universe is infinite, it has […]

What type of radiation is harmful? Gamma rays Which is the most Ionising radiation? Alpha What is a everyday example of radiation? Some common examples of Radiation are Ultraviolet light from the sun, heat from a stove burner, visible light from a candle, x-rays from an x-ray machine. All life on Earth depends on the […]

Which star has the greatest Blueshift? Greatest blueshift? Star I-450 has the greatest redshift. Star A-171 has the greatest blue shift. How do you tell if a star is moving toward or away from Earth? Here’s the game: if a star is coming towards you, its Fraunhofer lines will move toward the blue end of […]