Un rapper ha comprato un gioiello d'oro di forma sferica con diametro 8 mm. Una volta a casa misura la sua massa con una bilancia di precisione e ottiene 2,8 g. ► Quale sarebbe la massa del gioiello se fosse d'oro puro?

▸ Cosa puoi dedurre sul gioiello che ha comprato il rapper?

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.)

Hydrogen and helium are both members of?

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.