Um aluno colocou 50g de agua pura no congelador. Depois retirou o cubo de gelo do congelador e colocou-o num gobele, que se encontrava no laboratorio a temperatura de 20 graus C Indica, justificando, a temperatura de mistura do gelo e da agua durante a fusao

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

Hydrogen atoms are excited by a laser to the =4n=4 state and then allowed to emit. what is the maximum number of distinct emission spectral lines (lines of different wavelengths) that can be observed from this system? 8 6 2 7 4 5 1 3 calculate the wavelength of the 4⟶14⟶1 transition. =λ=

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination. at the turning point, how far is the second student from the destination?