Question

1. which demonstrates physical observations in a metal?

• ball and ring demo
• the copper sample
• heat treating
• conductometer

1. in the heat treating lab, which item was our source of high carbon steel?

• bobby pin
• paper clip
• copper wire
• the pliers

1. brass is a combination of copper with which other metal?

• copper
• tin
• zinc
• lead

Explanation:

Question 63 (assuming the first question is about determining a device for measuring something in a metal, likely related to heat or conductivity, but let's check the options. Wait, maybe it's a typo, but let's handle each:

Question 63 (assuming the question is about a device for measuring, but the options: "Conductometer" is a device to measure conductivity, so if the question is about measuring electrical conductivity in a metal, Conductometer is the answer. But let's confirm. Alternatively, if it's about heat treatment, but the options include Conductometer. Let's proceed with the best guess.

Question 64: In heat treating lab, high carbon steel source. Pliers (the pliers) are often made of high carbon steel for hardness. Bobby pin, paper clip (low carbon or other), copper wire (copper, not steel). So the answer is "The pliers".

Question 65: Brass is copper + zinc. So the answer is "Zinc".

Let's handle each with Answer-Explanation Format (Natural Science, subfield: Engineering or Chemistry)

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Question 63 (assuming the question is "Which instrument measures electrical conductivity in a metal?")

Conductometer is an instrument used to measure electrical conductivity. The other options (ball and ring device for thermal expansion, copper staple is a material, heat treating is a process) don't measure conductivity.

Pliers are typically made of high - carbon steel for strength and hardness. Bobby pins and paper clips are usually low - carbon or other alloys, and copper wire is copper (not steel).

Brass is an alloy composed of copper and zinc. Copper is the base metal, tin is in bronze, lead is in some alloys but not brass, and zinc is the correct metal combined with copper to make brass.

Answer:

Conductometer (the option with "Conductometer")

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Question 64: In the heat treating lab, which item was our source of high carbon steel?