What happens when you shine a green light on a red object? When white light falls on an object the body absorbs all colors of light and reflects some colors of light which we see the object to be. For eg. A red ball reflects red color and absorbs the rest colors.So,if I throw green […]
What is the value of inquiry based learning?
What is the value of inquiry based learning? The Value of Inquiry is a process of learning that involves a number of important activities for students, including asking their own questions, investigating multiple sources of information for a purpose, thinking critically to make sense of information they’ve found, and establishing and communicating new … How […]
What is the process of fractional crystallization?
What is the process of fractional crystallization? In chemistry, fractional crystallization is a method of refining substances based on differences in their solubility. It fractionates via differences in crystallization (forming of crystals). If the solubility products are very similar, a cascade process will be needed to effectuate a complete separation. How does decompression melting occur? […]
What is precision of a measurement?
What is precision of a measurement? Precision is defined as ‘the quality of being exact’ and refers to how close two or more measurements are to each other, regardless of whether those measurements are accurate or not. It is possible for precision measurements to not be accurate. What percent error is accurate? In some cases, […]
Who is Yorker King?
Does the sunrise change?
Does the sunrise change? This non-circularity of the orbit and the tilt of the Earth’s axis of rotation both contribute to the uneven changes in the times of sunrise and sunset. For example, as you noticed, the Sun rises only a little earlier each day in January, but sets noticeably later each day. How many […]
Can people be treacherous?
Can people be treacherous? Treacherous means either not trusted or dangerous. A treacherous road might be icy or otherwise likely to cause a car accident. A treacherous friend will betray you. Treachery refers to harmful acts you might do to someone who trusts you. What does treachery mean in English? violation of allegiance or of […]
What is the difference between a positive current and a negative current?
What is the difference between a positive current and a negative current? The positive sign for current corresponds to the direction a positive charge would move. In metal wires, current is carried by negatively charged electrons, so the positive current arrow points in the opposite direction the electrons move. Which side of a battery symbol […]
When a ball hits a wall is momentum conserved?
When a ball hits a wall is momentum conserved? When it hits a vertical wall it rebounds with a horizontal velocity v to the left. Since momentum is mass times velocity there would be a tendency to say momentum has been conserved. But momentum has changed from +mv to −mv. Is momentum conserved when a […]
Why does the position of a shadow change?
Why does the position of a shadow change? A shape of an object always determines the shape of its shadow. However, the size and shape of the shadow can change. These changes are caused by the position of the light source. As the Earth’s axial rotation spins our planet towards the light of the Sun, […]