Can a laser pointer cause fire?

Can a laser pointer cause fire? Whereas, for a laser pointer all of the light from it can reach your eye in one go if you were to stare into a laser beam. This can be dangerous because all of the energy from the laser beam is depositing on your eye in one go. But […]

How far away can the siren be heard?

How far away can the siren be heard? The physics of sound will reduce the volume of the siren as the distance from the siren increases. With today’s modern vehicles, the effective range of the siren at a 90-degree intersection is often no more than 80 feet. Does pitch change with distance? Sound waves that […]

Is burning 300 calories a day good?

Is burning 300 calories a day good? The participants who exercised for 30 minutes a day, burning 300 calories, lost an average of 7 pounds. It doesn’t seem to make mathematical sense, but neither do your hunger habits. Researchers found that participants in the 600-calorie category were eating more in each meal and snack. How […]

Will Dust Bowl happen again?

Will Dust Bowl happen again? More than eight decades later, the summer of 1936 remains the hottest summer on record in the U.S. However, new research finds that the heat waves that powered the Dust Bowl are now 2.5 times more likely to happen again in our modern climate due to another type of manmade […]

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