Answer:
An electromagnetic wave is a wave that can travel through empty space and through matter.
Explanation:
Answer:
The correct answer would be = t = 2.112 billion years
Explanation:
Given:
The number of crystal of uranium = 275 billion
The number of crystal of lead = 1925 billion
The half-life for 235U = 704 million years
Formula using :
N = N0e−λt
where,
no. of daughter atoms = N
at time t= 0, No. of parent atoms = N0.
Time = T
Half life = 0.693/λ
Decay constant = λ
Solution:
by putting value in the formula of the half-life
λ = 0.693/0.704
λ = 0.9844
Now, putting value in the formula for the age of granite.
275 = (275+1925)e^-0.9844 t
1/8= e^-0.9844 t
e^0.9844 t = 8
taking log
0.9844t = 2.07944
t = 2.112 billion years
Answer:
<em>The correct option is C.</em>
Explanation:
The structure mentioned in the question is cell membrane. The cell membrane can be described as a semi-permeable membrane which regulates the export and import of particles across the cell membrane. Some molecules move inside the cell along the concentration gradient by passive transport while other molecules move inside through active transport i.e against the concentration gradient.
The cell membrane is made up of phosphate head and fatty acid tails.
Flowers are essential for sexual, not asexual, plant reproduction. Flowers have co-evolved with pollinators so as to attract them from one plant;s sexual apparati to another's, thereby transporting plant male reproductive cells (gametes) from one plant to another.
The right answer is d. sugar molecules move outside of the membrane.
The simple diffusion is the diffusion through the plasma membrane (in the direction of the strong concentrations towards the weak concentrations, until equilibrium concentrations on both sides of the membrane). In the case that we have, the most concentrated compartment in glucose (that is inside the cell) will let it escape and go to the extracellular compartments until reaching equal concentrations between the two compartments.