Question
What do these two changes have in common? sanding a piece of wood knitting yarn into a scarf Select all that apply. Both are changes of state. Both are only physical changes. Both conserve mass. Both are caused by cooling.
Solution
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(200 Votos)
Moisés
Elite · Tutor por 8 anos
Resposta
The commonalities between sanding a piece of wood and knitting yarn into a scarf are that both are only physical changes and both conserve mass.
Explicação
## Step 1The problem presents two changes: sanding a piece of wood and knitting yarn into a scarf. We need to identify the commonalities between these two changes.## Step 2The first option states that both are changes of state. However, neither sanding a piece of wood nor knitting yarn into a scarf involves a change of state. A change of state refers to a transformation from one state of matter to another, such as from solid to liquid or gas. Neither sanding nor knitting involves such a transformation.## Step 3The second option suggests that both are only physical changes. This is true. Sanding a piece of wood and knitting yarn into a scarf are both physical changes. They do not alter the chemical composition of the materials involved. Sanding simply changes the shape and texture of the wood, while knitting changes the arrangement of the yarn but not its chemical structure.## Step 4The third option states that both conserve mass. This is also true. According to the law of conservation of mass, mass is neither created nor destroyed in a closed system. In both sanding and knitting, the total mass of the materials remains constant, even though their form changes.## Step 5The fourth option suggests that both are caused by cooling. This is not true. Neither sanding a piece of wood nor knitting yarn into a scarf is a process that is caused by cooling. Sanding is a mechanical process, and knitting is a method of creating fabric, neither of which inherently involves cooling.