Ascientist in a lab would like to determine if an object conducts electricity. which of the following experiments would test this? a. place the object on a source of heat, and measure the time it take to heat up. b. float the object in water. c. include the object in a circuit, and check to see if the circuit still works. d. weight the object before and after refrigeration.

A scientist in a lab would like to determine if an object conducts electricity. How could he test this ?

A. Place the object on a source of heat, and measure the time it take to heat up.  No.  This would  tell him how well the object conducts heat, but not electricity.

B. Float the object in water.  No.  This would tell him the object's density, and also maybe how well it can absorb water, but nothing about conducting electricity.

C. Include the object in a circuit, and check to see if the circuit still works.  YES !  If the circuit still works, then the object conducts electricity.  If it doesn't then it doesn't.

D. Weight the object before and after refrigeration.  No.  This doesn't tell him much of anything ... there's no reason why the object should weigh more or weigh less when it's warm or cold.

the area between the graph and the t axis

+15-35=-20

going in opposite directions