A certain metal has a coefficient of linear expansion of 2.00 ...

[charchew]

A certain metal has a coefficient of linear expansion of 2.00  10-5 K-1. It has been kept in a laboratory oven at 325C for a long time. It is now removed from the oven and placed in a freezer at -145C.
 
  After it has reached freezer temperature, the percent change in its density during this process is closest to
  A) +2.90.
  B) -2.90.
  C) +2.74.
  D) -2.74.
  E) It is not possible to tell without knowing the mass and original volume of the metal.

Question 2

The coefficient of volume expansion of olive oil is 0.68  10-3 K-1. A 1.00-L glass beaker is filled to the brim with olive oil at room temperature.
 
  The beaker is placed on a range and the temperature of the oil and beaker increases by 25C. As a result, 0.0167 L of olive oil spill over the top of the beaker. What is the coefficient of linear expansion of the glass?
  A) 1.0  10-6 K-1
  B) 4.0  10-6 K-1
  C) 1.0  10-5 K-1
  D) 2.0  10-5 K-1
  E) 3.0  10-5 K-1

[mistyjohnson]

Answer to Question 1

Answer: A

Answer to Question 2

Answer: B

[charchew]

Thank you!

[mistyjohnson]

Always glad to help...