**Answer:**

The tension in the rod as the ball moves through the bottom circle is 9.8 N

**Explanation:**

When the ball is released from rest, the centripetal force equals the weight of the ball. So mv²/r = mg where m = mass of ball = 0.5 kg, v = speed of ball, r = radius of vertical circle = length of rod = 0.5 m and g = acceleration due to gravity = 9.8 m/s²

v = √gr = √9.8 m/s² × 0.5 m = √4.9 = 2.21 m/s

Now at the bottom of the circle T - mg = mv²/r where T = tension in the rod

T = m(g + v²/r)

= m(g + (√gr)²/r)

= m(g+ gr/r)

= m(g + g)

= 2mg

= 2 × 0.5 kg × 9.8 m/s²

= 9.8 N

So, the tension in the rod as the ball moves through the bottom circle is 9.8 N

**Answer:**

The law of multiple proportions states that when two elements can combine in different ratios to form different compounds, the masses of the element combining with the fixed mass of another element result in whole number ratios. This shows that the law of multiple proportions is followed

**Explanation:**

Force, it is force because to be able to move anything you must use force.

**Answer:**

Both the Technician A and Technician B are correct

**Explanation:**

According to Technician A, an ammeter measures current flow which is correct.

An ammeter is a device which measures the rate of flow of electrons constituting electric current that flows in a circuit.

According to Technician B, Ammeter must be connected in series in an electric circuit which is also correct.

In a circuit with parallel connections, voltage across each branch is same and current is distributed and is different in each branch.

In a series connected circuit, the potential drop, i.e., voltage across each connected element is different while the current in series is the same.

So, in order to measure the correct value of current flowing in the circuit, ammeter must be connected in series in the circuit.

<span>1. capable of being dissolved in a liquid= Soluble

</span><span>

2. not capable of being dissolved in a liquid= Insoluble

</span><span>3. to break up in unit parts to form a solution= Dissolve

</span>

<span>4. the substance that is dissolved in the solution= Solute

</span>

<span>5. the substance that does the dissolving= Solvent

please be more clear in the way you word you questions from now on. I had a hard time understanding what you meant. I hope this helps.

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