The half-life is simply the amount of time it takes for half of the isotope to decay into something else.
<span>After 1 half-life, half of the original sample remains. After a second half-life, half of that part remains or 1/4 of the original....after 3 half-lives, 1/8 remains and so on. </span>
<span>In your example, ut started with 8 billion atoms. After one half-life, there was 4 billion. After a second half-life, there was 2 billion and after 3, one billion remain.</span>
Answer: The one that fell on its feet.
Explanation: The sinking of the two cows will depend on the pressure exert on the mud.
Pressure is the ratio of force to area.
The one which fell on its side would exert lower pressure because of its larger side of area. While the one that fell on its feet will exert greater pressure because of small area of its feet.
Therefore, the one that fell on its feet will sink furthest into the mud because of the ratio of the force to area of its feet ( pressure) is higher.
Its an example of weathering
Answer:
Explanation:
Find the acceleration reached by each of the two objects shown in Figure P4.49 if the coefficient of kinetic friction between the 7.00 kg object and the plane is 0.270.
The weight of the 12.00 kg object = 12.00 * 9.8 = 117.6 N
This force is accelerating the 7.00 kg object up the incline, and accelerating the 12.00 kg object straight down.
The weight of the 7.00 kg object = 7.00 * 9.8 = 68.6 N
This force has causes the 7.00 kg object to accelerate down the incline, and produces a force perpendicular to the surface of the incline.
The force perpendicular to the surface of the incline produces the Friction force that resists motion down the incline.
Force parallel = mass * g * sin θ = 7.00 * 9.8 * sin 37º = 68.6 * sin 37º
Force perpendicular = mass * g * cos θ
Friction force = μ * mass * g * cos θ = 0.270 * 7.00 * 9.8 * cos 37º
Friction force = 18.522 * cos 37º
Force caused by weight of 12.00 kg object = 117.6 N
