Astraight rod consists of a 1.2-cm-long piece of aluminum attached to a 2.0-cm-long piece of steel. part a by how much will the length of this rod change if its temperature is increased from 20∘c to 40∘c?

Okay now the answer Mastering accepted was 0.0010 cm, if you actually calculate it which is the same as your 1.0 E^-5 except that answer was in m not centimeters, so you multiply it by 100cm/m.

You might want to check to make sure you used the right alpha levels (23 E^-6 for aluminum and 12 E^-6 for steel)

Hope this helps!

the focus of lesson 1 is newton's first law of motion - sometimes referred to as the law of inertia. newton's first law of motion is often stated as. an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

explanation:

because growing process had stoped after 4-5 year