Cho 2,8 gam hỗn hợp CuO , MgO , Fe2O3 tác dụng vừa đủ với 50ml dung dịch H2SO4 1M . Cô cạn dung dịch sau phản ứng thu được m gam muối . Tính giá trị của m

How do scientists think that gravity affected the formation of our solar system?

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma