Determine the half life of a nuclide that loses 38.0% of its mass in 427 hour

Clouds form when water vapor to form small droplets. a. humidifies b. condenses c. evaporates d. precipitates

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.