Category: Physics

What is buffer solution give example? Buffer solutions resist a change in pH when small amounts of a strong acid or a strong base are added (Figure 1). A solution of acetic acid and sodium acetate (CH3COOH + CH3COONa) is an example of a buffer that consists of a weak acid and its salt. What […]

What is easier rolling or sliding? When an object rolls over the surface of another object ,the resistance to its motion is called rolling friction. It is always easier to roll than to slide an object over another object.So rolling friction is much less than the sliding friction. Why is sliding faster than rolling? 25ex2 […]

Why is the crater important? The Planetary Deep Past Impact craters allow scientists to study a planet’s geological history—even when the records are buried beneath the surface. Rocks ejected by impacts contain minerals that formed in the presence of liquid water; some craters also show signs of ancient lakes. What is the biggest crater on […]

How much of the ice cube will be submerged below the surface of this liquid? 90% Why do you float more easily in the ocean than in fresh water? When salt is dissolved in water, as it is in ocean water, that dissolved salt adds to the mass of the water and makes the water […]

Why did Islam spread so quickly quizlet? Islam spread quickly because its leaders conquered surrounding territories. As Muhammad and the Muslim leaders that came after him conquered lands in the Middle East and beyond they spread the teachings of Islam. Islam spread quickly because its lands were well governed and orderly. How did Islam spread […]

What does G pair with in DNA? The rules of base pairing (or nucleotide pairing) are: A with T: the purine adenine (A) always pairs with the pyrimidine thymine (T) C with G: the pyrimidine cytosine (C) always pairs with the purine guanine (G) Is DNA base 2 or base 4? DNA is more 2-based […]

Are cathodes positive? The anode is the electrode where electricity moves into. The cathode is the electrode where electricity is given out or flows out of. The anode is usually the positive side. A cathode is a negative side. Is cathode positive or negative in battery? The electrode of a battery that releases electrons during […]

What periodic trend is most important for determining metal reactivity? Metallic and Non-metallic Character Within a compound, metal atoms have relatively low attraction for electrons, as indicated by their low electronegativities. By following the trend summary in the figure below, you can see that the most reactive metals would reside in the lower left portion […]

What happens if thrust is greater than drag? If thrust is greater than drag, the aircraft will speed up, and subsequently, if drag is greater than the thrust, you’ll slow down. Lift is the force that counteracts the weight of an object in order to keep it in the air. What are 4 things that […]

What is the principle of electric iron? An electric iron is based on the principle of heating effect of current that heat is produced in the nichrome wire used in the iron due to the current flowing through it. Which coating is best for iron? Which soleplate is best for ironing? Stainless steel soleplates have […]