Deaths due to lifestyle diseases have declined since the early 1900s.

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What type of light does this light bulb produce most (i.e. at what wavelength does the spectrum have maximum intensity)?

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?

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?