A car is sitting at a stoplight. When the light changes, the car accelerates at a rate of 11.8 m/s2 until it reaches the speed limit of 30 mph. The car maintains this speed for 4.9 s, at which time the driver sees the next stoplight turn red and immediately begins to decelerate steadily, coming to rest 7.0 s later. What is the distance between these successive stoplights

The “death throes” of stars are amongst the most complex phenomena in all of astronomy, and the “corpses” of stars amongst the most energetic and exotic objects in existence. beginning at the end of the core helium fusion stage in a star’s life, describe in detail the post-main sequence development of both (a) a 1.0 solar mass star, and (b) a 25.0 solar mass star. in what significant ways do they differ? what role does each of these types of stars play in the "star-gas-star" cycle and the evolution of chemical elements in our galaxy?

If gases like carbon dioxide and methane make up less than 1% of the total atmosphere, why is it important for scientists to monitor changes in percentages of these gases?

Who was the first scientist to measure speed as distance over time?