We can learn a lot about the properties of a star by studying its spectrum. all of the following statements are true except one. which one? a. we can look at doppler shifts of spectral lines to determine the star's speed toward or away from us.
b. the peak of the star's thermal emission tells us its temperature: hotter stars peak at shorter (bluer) wavelengths.
c. the total amount of light in the spectrum tells us the star's radius.
d. we can identify chemical elements present in the star by recognizing patterns of spectral lines that correspond to particular chemicals.

Name the river that forms a natural border between new york and new jersey and is the site where a passenger jet made a miraculous landing on january 15

The great scientist alfred wegener proposed that continents have moved, while other scientists such as t. c.chamberlin argued against wegener. wegener's ideas eventually won, and are now widely accepted, because: a) wegener's ideas were more beautiful, and so were favored by the intellectual elite. b) wegener's ideas did a better job of predicting the results of new observations and experiments. c) wegener's ideas appealed to dead white european males, whereas chamberlin's didn't. d) wegener's ideas appalled dead white european males, and we all know that in this politically correct era, dead white european males cannot get a fair shake. e) wegener won the nobel prize.

After railroads, the next revolution of transportation came with the development of (a) automobile (b) telegraph (c) steam engine