A copper wire is 31.12 cm long and weighs 1.261 g. The density of copper is 8.933 g/cm3 . What is the radius of the wire in millimeters?
What is the diameter of the wire?

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

Select the correct answer. which statement is true about a polarized object? o a. it gains electrons and becomes negatively charged. ob. it gains protons and becomes positively charged. oc. the number of positive and negative charges can be the same. od. it has to be a metal. o e. there is no change in the distribution of the charge in the object. reset next what

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.