Amachinist bores a hole of diameter 1.360 cm in a steel plate that is at 24.2 ∘c. what is the cross-sectional area of the hole when the temperature of the plate is increased to 156∘c? give an answer in cm2 with 3 significant figures. assume that the coefficient of linear expansion remains constant over this temperature range.

Copper has free electrons per cubic meter. a 71.0-cm length of 12-gauge copper wire that is 2.05 mm in diameter carries 4.85 a of current. (a) how much time does it take for an electron to travel the length of the wire? (b) repeat part (a) for 6-gauge copper wire (diameter 4.12 mm) of the same length that carries the same current. (c) generally speaking, how does changing the diameter of a wire that carries a given amount of current affect the drift velocity of the electrons in the wire?

Observations show that interstellar clouds can have almost any shape and

What are the similarities & differences between a thermistor and a light dependent resistor in physics?