un tren desde el punto A con una velocidad de 30km/h , Hora y media mas tarde sale otro coche con velocidad 50 km/h¿cuando y donde el segundo tren alcanzara al primero?

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.