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
As Myra needs to measure the gravitational force on the apple, a triple beam balance would be ideal to measure it.
The measure of the gravitational force on or near the Earth’s surface is its weight. This is the force of gravitation exerted by any object on Earth. Mass of an object determines its gravitational force. The force of gravitation or the measure of the weight is numerically equal to the product of mass of the object and the acceleration due to gravity on Earth which is constant having a value of 9.8 m/s^2.
Answer: 17
The atomic number is the number of protons, neutrons, or electrons a cell has in its original form
Answer:
D. Increased sunlight and increased nutrients will increase phytoplankton populations.
Explanation:
Both sunlight and nutrients are required by phytoplankton communities. We know that <u>phytoplanktons</u> are <u>primary producers</u> and they produce food via <u>photosynthetic activities</u>. To carry out photosynthesis, <u>presence of (inorganic) nutrients and sunlight is highly important</u>. In this process, energy is fixed in energy rich molecules such as glucose and organism multiply and/or gain biomass. A decrease in any of them will result into reduced photosynthesis and hence reduced phytoplankton population growth.
Answer:
"You have to believe the exercise works before you try it" would be the pseudoscientific claim.
