An infrared lamp operating at a wavelength of 8.95 x10-7 m is used to heat up 2.50 ⋅ 102 g of water from 20.0°C to 90.0°C. Calculate the number of photons needed to do so, assuming that all of the infrared energy is converted into thermal energy.

A6.10 m nacl can be made by adding [x]g of nacl to a container and making the volume of water up to the 1.00 l line

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

Which of these is a physical property