Is a rolling pin a wheel and axle? Guide them to express these understandings: The rolling pin is a wheel and axle. When you push on the handles (the axle) the wheel turns and flattens out the dough. Challenge students to think of other common machines that have one wheel like the rolling pin. What […]
How can we find Valency of oxygen?
How can we find Valency of oxygen? If its Valence electrons are less than 4, then valency is equal to number of valence electrons and if it is more than 4 then valency is obtained by subtracting number of valence electrons from 8. Atomic Number of oxygen is 8. So, electronic Configuration of oxygen= 2, […]
What are the two limits of temperate zone?
What are the two limits of temperate zone? The north, temperate zone extends from 23.5° north to the Arctic Circle, 66.5° north latitude. In the Southern Hemisphere, it extends from the 23.50S Tropic of Capricorn to 66.5° S Antartica Circle. What are the 3 climatic zones? The Earth has three main climate zones: tropical, temperate, […]
What kind of tectonic boundary do we find near the Pinnacles National Park in Northern California?
What kind of tectonic boundary do we find near the Pinnacles National Park in Northern California? Located near the boundary of the Pacific Plate and the North American Plate, Pinnacles National Park is an excellent example of tectonic plate movement. The Pinnacles Rocks are believed to have originated in the Neenach Volcano, near present-day Lancaster, […]
What is molecule and its types?
What is molecule and its types? A molecule is defined as two or more atoms of the same element different element that are bound together. A molecule may be homonuclear, which means, it consists of atoms of one chemical element, as with oxygen (O2); or it may be heteronuclear, a chemical compound composed of more […]
How can your ear determine where sound is coming from?
How can your ear determine where sound is coming from? Humans use two important cues to help determine where a sound is coming from. These cues are: (1) which ear the sound hits first (known as interaural time differences), and (2) how loud the sound is when it reaches each ear (known as interaural intensity […]
Which among the following have a mutually beneficial relationship?
Which among the following have a mutually beneficial relationship? Answer: Symbiosis is the mutually beneficial relationship between two living organisms. What do we call a mutually beneficial reaction? A mutually beneficial relationship between two different organisms for nutrition is called as. Hint: Mutualism is a relationship in biology where there is mutual benefit to any […]
Is paper positive or negative charge?
Is paper positive or negative charge? The bits of paper are electrically neutral, but when you bring the rod close to them, even though paper is not a conductor, that is, the charges within it are not free to move about as a current, the negative charges have enough mobility that they are repelled by […]
What will happen when the rubber duck is pushed underwater and then released?
How do you keep intensity constant?
How do you keep intensity constant? Intensity = Power/Area = (Energy/time)/Area. Given that the energy of each photon is greater with a higher frequency of light, there must be fewer photons hitting the metal surface per unit time in order to keep the intensity constant. How do you increase intensity with the same weight? To […]