Why does some friction occur with seemingly smooth surfaces?
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Answer: Static electricity will help in seed dispersal in cone bearing seeds.
Explanation:
Static electricity is the stationary electric charge produced by the friction. The static electricity can be produced by the turbulence or air currents in the storm clouds. This is responsible for the cause of lightening phenomena.
The cone bearing seeds exhibit cones that are hard and woody in nature. The static electricity due to the effect of lightening generate electrical shock which breaks open the cone and disperse the seeds. Thus the static electricity is important for seed dispersal in cone bearing trees.
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Answer: Option (b) is correct.
Explanation:
Frost wedging occurs at extremely cold weather where continuously water seeps into the cracks, freezes and expands causing a break into the rock.
Mass wasting is the downward movement of sand, soil, and rocks due to the force of gravity. Mass wasting occurs because the gravitational force acting on the slope becomes greater than its resisting force.
Aeolian bands are related to the wind force because of which the sand and other particles move form one place to another.
Glaciation is the process of occurrence of glaciers and the formation of shape of the landscape around them.
Thus, it can be concluded that mass wasting is caused by gravity.
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B)2,1,1,2
C)3,2,1,4
D)1,2,2,1
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The numbers to be added to the blanks to balance this chemical equation are 2, 1 , 1 and 2
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
Thus in the reactants, there are 2 atoms of hydrogen , 1 atom of oxygen and 4 atoms of flourine.Thus there will be atoms of hydrogen , 1 atom of oxygen and 4 atoms of flourine in the product as well.
Learn more about conservation of mass
3. what type of ion is
magnesium?
4. what type of ion is silicone?
5. what type of ion is carbonate?
6. what type of ion is nitrate?
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Answer:
1. Univalent negative ion (Cl-)
2. Divalent negative ion (O2-)
3. Divalent positive ion (Mg2+)
4. Divalent negative ion (S2-)
5. Divalent negative ion (CO3)^2-
6. Univalent negative ion (NO3) ^-