Aluminum has a coefficient of linear expansion of 2.4x10^-5 c^-1 and a coefficient of volume expansion of 7.2x10^-5 c^-1. an aluminum wire at 20 degrees c has a length of 10 m and a cross-sectional area of 1 cm^2. it is then heated to 100 degrees c. what is the new length of the wire?

An electric current is flowing through the cord below.what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?