Beta emission is occurring in the given nuclear reaction.
Answer: Option B
<u>Explanation:</u>
In this equation, the reactant is the Thorium atom, which is reduced to palladium. As the atomic number get decreased by one, so an electron will be emitted. This process of emission of electrons by radiation or decaying the reactant nuclei to form a new product nuclei is termed as beta emission.
So, the electrons are generally termed as beta particles while the positrons are termed as positive beta particles. So this is a kind of radioactive reactions where the reactant changes to new element by releasing an electron and thus there is a change in the atomic number of the product by one.
There are 6 atoms of oxygen in Ca (NO3)2.
Answer:
17. h = l − l cos θ
18. 1.40 m
Explanation:
Let's call d the height of the triangle. We can then say:
h = l − d
Using trig, we can write d in terms of l and θ:
d = l cos θ
h = l − l cos θ
If l = 6 m and l cos θ = 40°:
h = 6 − 6 cos 40
h ≈ 1.40
Yes, D is the correct answer. The ammeter reads 9 Amps, and that current is flowing down, away from the intersection.
The reason is simple, and I'm sure you must have learned it somewhere along the way:. The sum total of all the currents INto any point in a circuit is equal to the total of the current OUT of the same point. In other words: The sum total of the current building up at any point in a circuit is ZERO.
Why ? Current is a river of electrons. If there's more current arriving at a point or leaving it, then you need something there that can create new electrons, store them, destroy them, or eat them.
The picture shows 5+7=12A arriving at the intersection, so you need 12A leaving that point. 3A + the ammeter reading = 12A.
Got it now ?
Answer:
COP = 4.25
Explanation:
It is given that,
Cooling temperature, 
Heating temperature, 
We need to find the coefficient of performance. It is given by :
COP = 4.25
So, the best coefficient of performance of a refrigerator is 4.45 Hence, this is the required solution.
