Astudent carries a glass cube whose length of the edge (l) is 4.425 cm. the density of the glass is 3.755 g/cm3 . she drops the cube, and a piece having a mass of 19.40 g breaks off. to repair the cube, student adds plastic having a density of 2.355 g/cm3 and reshapes the cube to its original shape and size. (a) what is the volume of the plastic part? (b) what is the volume of the composite object? (c) calculate the volume of the glass. (e) calculate the mass of the glass. (f) what is the mass of the composite cube? (g) calculate the density of the new composite cube.

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

The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.

How much energy will be transferred to your eardrum while listening to this sound for 1.0 min?