What is the outside temperature if 4000 kcal of heat is lost through a 4.0 m 2 pane of 0.30 cm thick glass (k = 2.0 × 10 -4 kcal/s∙m∙ in one hour from a house kept at 20°C?

f is prop to m1xm2 double m1 double force

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.