Why are chemical changes considered "unseen?"

2 answers:

6 0

Chemical changes are considered unseen because they occur at the atomic level, changing the actual structure of the thing. This is in comparison to a physical change, which is visible.

Andrej [43]2 years ago

5 0

Chemical changes are considered unseen because they occur at the atomic level, changing the actual structure of the thing.

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Select the correct answer.

faltersainse [42]

The SI unit of time in seconds

4 0

3 years ago

- Nitinol is an alloy of *

Aleks04 [339]

Answer:

Nickel and Titanium

Explanation:

Nitinol is an alloy of Nickel and Titanium. It posesses two properties such that,

The shape memory effect
Super elasticity

Shape memory is the ability of nitinol to undergo deformation at one temperature, stay in its deformed shape when the external force is removed.

Superelasticity is the ability for the metal to undergo large deformations and immediately return to its undeformed shape upon removal of the external load.

Hence, the correct option is (b) "Nickel and Titanium".

7 0

3 years ago

How do scientists test their ideas

-Dominant- [34]

I think it’s B not rlly sure

5 0

2 years ago

What energy does a rock resting on a hilltop store?

Hunter-Best [27]

Answer:

gravitational energy

Explanation:

It is gravitational (potential) energy because of the place that the rock holds in the gravitational field. It has potential to move downward, because of gravity.

7 0

3 years ago

2 reasons why recycling aluminium is a good idea

Mazyrski [523]

Answer:

Recycling aluminium saves around 95% of the energy needed to make the metal from raw materials. Along with the energy savings, recycling aluminium saves around 95% of the greenhouse gas emissions compared to the 'primary' production process.

Explanation:

7 0

3 years ago

Read 2 more answers