The mass lost in the reaction is 0.227 × 
Kg
The energy that is released during a nuclear reaction can be related to the mass lost using the Einstein equation.
E = m
by Einstein demonstrates that matter and energy are only two different manifestations of the same thing. It also demonstrates how much energy (E) can fit into a relatively small mass (m) of matter. Nuclear processes convert matter into energy, yet the combined amount of mass and energy remains constant.
Given that;
E = Δ
Δm = 
Δm = 2. 05 × 10^11 J/( 3 × 10^8)^2
Δm = 0.227 × Kg
Learn more about Einstein's equation:
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Answer:
The acceleration of the cart is 283.54g
Explanation:
It is given that,
Initial speed of the car, u = 35 km/h = 9.72 m/s
Finally, it stops, v = 0
Diameter of the dime, d = 1.7 cm
Let a is the acceleration of the car. Using third equation of motion to find it as :
So, the acceleration of the car is 
and it is decelerating.
Since, 
So, 
So, the acceleration of the cart is 283.54g. Hence, this is the required solution.
Answer:
Mg (atomic number 12)
K (atomic number 19)
Explanation:
The size of an atom is estimated in terms of its atomic radius.
The atomic radius is taken as half of the inter-nuclear distance between two covalently bonded atoms of non-metallic elements or half of the distance (d) between two nuclei in the solid - state of metals.
- Across a period, atomic radii decrease progressively from left to right.
- This is due to the progressive increase in the nuclear charge without increase in the number of electronic shells.
- Down a group, atomic radii increase progressively due to the successive shells of electrons being added which have been compensated for by the increase in nuclear charge.
Cl is further right of Mg in the third period
K is below Na in the first group
Answer:
Explanation:
We can use kinematics equation 
to solve this problem. Since 
in the vertical direction is 
, we have:
(freefall equation)
Plugging in values, we get:
(one significant figure).
*The horizontal velocity is irrelevant in this question. It only affects the horizontal displacement of the object (where the object lands), not how long it takes for the object to hit the ground.
