Answer:
<h3>2139 Million years</h3>
Explanation:
Half life of a material is the time required for the material to decay into half of initial amount.
initially there is 26 grams of uranium-235, and the final amount is 3.25 gram
ratio between initial and final amount = 
now it is clear that the material have halved 3 times from initial condition
number of half lives passed = 3
number of half lives passed can also be found using the equation
no of half lives = 
where 
is the initial amount of material and R is the final amount
∵ Number of half lives = 
= 3
So, age of rock = half-life X number of half-lives passed
=713000000 X 3
= 2139000000
=2139 Million Years
Answer:
Thermocline.
Explanation:
The sunlight does not reaches deep inside the water called as the deep layer in which the temperature of water is low and it is cold. These two layers are separated by the middle layer called as the thermocline, which is warm at the top and cold at the bottom.
Answer:
Option B
Explanation:
A gaseous, highly reactive non-metal
Answer:
T = 120.3 N
Explanation:
Since, the tension in the rope is acting against both the centripetal force and the weight of the stone. As both act downward towards center of the circle and tension acts towards point of support that is upward. So, tension will be equal to the sum of centripetal force and weight of the stone:
Tension = Centripetal Force + Weight of Stone
T = mv²/r + mg
where,
m = mass of stone = 5.31 kg
r = radius of circle = length of string = 2.99 m
g = 9.8 m/s²
Therefore,
T = (5.31 kg)(6.2 m/s)²/(2.99 m) + (5.31 kg)(9.8 m/s²)
T = 68.27 N + 52.03 N
<u>T = 120.3 N</u>
I think Physical science because basic wouldn't or applied or biology
