What if Earth had a 90 degree tilt? If the earth was tilted by 90 degrees the seasonal changes would be at the most extreme. The Earth’s pole would point directly at the sun at a point on the track around the sun. This would produce very hot temperatures at one pole while at the […]
Why is crystallization done class 11?
Why is crystallization done class 11? Crystallisation of the filtrate This is done to ensure uniform evaporation and to prevent formation of a solid crust. When the volume of the solution is reduced to one half, dip one end of a glass rod in the concentrated solution and cool the drop by blowing on it. […]
What are three uses for Convex mirrors?
What are three uses for Convex mirrors? Convex mirrors are used inside the buildings, They are also used in making lenses of sunglasses, They are used in the magnifying glass, They are used in securities and they are used in telescopes. What lens is thicker in the middle than at the edges? A single piece […]
What is gamma decay stopped by?
What is gamma decay stopped by? Gamma radiation is the most penetrating. It can penetrate air, paper or thin metal. It may only be stopped by many centimetres of lead or many metres of concrete. What is the strongest ionizing radiation? Alpha particles What is the most dangerous type of ionizing radiation? Gamma rays are […]
What does refractive index indicate?
What does refractive index indicate? Refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another. Refractive index is also equal to the velocity of light c of a given wavelength in empty space divided by its velocity v in a substance, or […]
Which perspective considers the relationship between individuals?
Which perspective considers the relationship between individuals? Contextual perspective considers the relationship between individuals and their physical, cognitive personality, and social words. Contextual perspective is one of the modern psychological perspectives. The psychodynamic perspective is based on Sigmund Freud thought. What are some current issues in lifespan development? Four important issues in lifespan development are […]
Why do bulbs in a series circuit get dimmer?
What is biodiversity Why is it important for human life?
What is biodiversity Why is it important for human life? Biodiversity is important to humans for ecological life support, biodiversity gives a functioning ecosystem that provides oxygen, clear air and water, plant pollutions, pest control, wastewater treatment and lots of ecosystem services. How does biodiversity loss affect humans? More… 2.1 Biodiversity loss has negative effects […]
Which atom will never form a double bond?
Which atom will never form a double bond? The double bond rule states that chemical elements with a principal quantum number greater than 2 for their valence electrons (period 3 elements and lower) tend not to form multiple bonds (e.g. double bonds and triple bonds) with themselves or with other elements. Can carbon form a […]
Can you have a negative mechanical energy?
Can you have a negative mechanical energy? Yes mechanical energy can be negative. Mechanical energy is the sum of potential as well as kinetic energy. Can energy of a body be negative? The kinetic energy of a body cannot be negative because the mass cannot be negative and the square of the speed gives a […]