Find the mass m of the counterweight needed to balance a truck with mass M = 1 580 kg truck on an incline of θ = 45°. Assume both pulleys are frictionless and massless.

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

What causes the formation of ocean currents?

Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?