You turn right on a red light if you are in the right-most lane, you're turning into the left-most lane on the cross road, and no nearby sign prohibits the turn. a. may b. may not c. must d. should

What would the difference of spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 cm on earth, be observed at 21.1 centimeters?

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages