Answer:
C. 22N
Explanation: Note that we are considering a uniform beam XY which implies that it will be evenly divided. That is the weight will be in between.
One of the laws of equilibrium states that the sum forces across the clockwise moment = sum of forces across the anticlockwise moment
Hence from the diagram we have
(8×50)+(4×10) = 20 × X
400+40 = 20X
440 = 20X
X = 440/20
X = 22N
Hence the answer is option C which is 22N
This relationship is called commensalism.
Answer:
Velocity after collision will be 5.56 m/sec
So option (a) will be correct answer
Explanation:
Mass of steel ball 
Speed of steel ball before collision 
Mass of large ball 
Velocity of large ball 
According to conservation of momentum
So velocity after collision will be 5.56 m/sec
So option (a) will be correct answer
All you need to know for this question is Ohm’s Law:
V=IR
I=V/R
R=V/I
So, the answer is (3) Resistance, since it is inversely proportional to Current (I=V/R)
Concept: Dynamic Equilibrium: At dynamic equilibrium, the rate of reactants and the rate of products are almost equal. This means the reactants are converted into products and products are converted to reactants at an equal and constant rate. The equilibrium always tells the state of equal, opposite rates, not equal concentrations. So, it will seem like nothing is happening. Dynamic equilibrium can only happen in a closed system at a constant temperature.
Explanation: As per Le Chatelier's Principle, when we open the nozzle of the right tank, the amount of water in the right tank decreases because both the tanks are connected by a pipe. To counter this change water flows in from the left tank so the dynamic equilibrium will be established.
