What is meant by visual angle? Visual angle is the angle a viewed object subtends at the eye, usually stated in degrees of arc. It also is called the object’s angular size. The diagram on the right shows an observer’s eye looking at a frontal extent (the vertical arrow) that has a linear size , […]
What happens if you burn sugar?
What happens if you burn sugar? Sugar is made of carbon, hydrogen and oxygen atoms. When heated over a candle, these elements react with the fire to turn into a liquid. The heat causes the sugar’s atoms to combine with the oxygen in the air, forming new groups of atoms. Energy is released in this […]
What is the acceleration in a straight line?
Who proposed dynamo theory?
Who proposed dynamo theory? Walter M. Elsasser What evidence supports the dynamo theory? Earth’s crust core contains a large amount of iron and nickel is the evidence of the dynamo theory. What is meant by dynamo effect? Dynamo Effect. The dynamo effect is a geophysical theory that explains the origin of the Earth’s main magnetic […]
What is the coefficient of volume expansion?
What is the coefficient of volume expansion? An object of volume V expands to V+ΔV when temperature is increased by ΔT, then volume expansion coefficient αv is given by. αv = (ΔV/V) / ΔT. What is a coefficient of thermal expansion? THE COEFFICIENT OF LINEAR thermal expansion (CTE, a, or a1) is a material property […]
How long should you hold your stretch for?
How long should you hold your stretch for? For optimal results, you should spend a total of 60 seconds on each stretching exercise. So, if you can hold a particular stretch for 15 seconds, repeating it three more times would be ideal. If you can hold the stretch for 20 seconds, two more repetitions would […]
Does bulb have electromagnet?
Does bulb have electromagnet? the core of an electromagnet must be a metal that can allow current to flow and can produce necessary magnetic field. What type of light does this light bulb produce most? continuous light Does a compass use electromagnets? The needle of a compass is itself a permanent magnet and the north […]
Why do sea breezes occur in the day but not at night?
What do you do when a student refuses to participate?
What do you do when a student refuses to participate? If a student is outwardly refusing to do work in the classroom, there is always a reason….If they are in the classroom, keep teaching them! Give wait time. When a student refuses work at first, sometimes all they need is a little wait time. Ignore […]
Is the supply curve positive or negative?
Is the supply curve positive or negative? Market Supply: The market supply curve is an upward sloping curve depicting the positive relationship between price and quantity supplied. The market supply curve is derived by summing the quantity suppliers are willing to produce when the product can be sold for a given price. What is the […]