Please help me I need help I don't know how to do these
...
Answers: 2
Physics, 22.06.2019 12:30
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 4βΆ14βΆ1 transition. =Ξ»=
Answers: 2
Physics, 22.06.2019 14:30
Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.
Answers: 2
Physics, 22.06.2019 14:30
Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.
Answers: 2
Physics, 22.06.2019 18:00
Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above
Answers: 1
English, 30.07.2019 20:00
Mathematics, 30.07.2019 20:00
Mathematics, 30.07.2019 20:00
Mathematics, 30.07.2019 20:00
Chemistry, 30.07.2019 20:00
Mathematics, 30.07.2019 20:00
Chemistry, 30.07.2019 20:00
Biology, 30.07.2019 20:00