Answer:
B is correct.
Explanation:
Given the equation
According to alpha emission
Alpha emission is a radioactive decay in which the atomic nucleus emit the alpha particle and formed a new nucleus whose mass number reduced by four and atomic number reduced by two.
Therefore,
Po is the new nucleus.
Where, Rn = Radon
Po= polonium
Answer:
Explanation:
Given:
<em>For the condition of no slip the force of static friction must be greater than the applied force so that there is no skidding between the contact surfaces at the contact point.</em>
where:
= static frictional force
The correct answer of this question is : 10.2 Kg.
EXPLANATION :
As per the question, the ball is attached to the cable.
The tension produced in the cable when the ball is hanged from it, is equal to the weight of the ball. It is so because the cable maintains its equilibrium.
Hence, tension in the cable = weight of the ball.
The tension produced in the cable is given as T = 100 N.
The weight of the ball is equal to the product of mass with acceleration due to gravity.
Let the mass of the ball is m.
Hence, weight of the ball W = mg
Here, g is known as acceleration due to gravity, and its value is g = .
From above, we know that W = T
⇒ mg = 100 N
⇒ m = Kg
=
= 10.2 Kg. [ans]