Question

what type of substance can be placed directly on the pan of an electronic balance? select one:
○ solid objects and powders
○ solid objects and liquids
○ solid objects only
○ powders and liquids

Explanation:

To determine what can be placed directly on an electronic balance pan:

• Powders can contaminate the pan, so they shouldn't be placed directly.
• Liquids can spill and damage the balance, so they also shouldn't be placed directly.
• Solid objects (that are clean and won't damage the pan) can be placed directly. So the correct option is the one with solid objects only.

Answer:

C. solid objects only (assuming the third option is labeled C; if the original options had labels like A, B, C, D with the third being "solid objects only", then the answer is the option corresponding to "solid objects only", e.g., if the third option is C, then C. solid objects only)