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 […]

Are all projectiles parabolic?

Are all projectiles parabolic? Projectile motion is parabolic because the vertical position of the object is influenced only by a constant acceleration, (if constant drag etc. is also assumed) and also because horizontal velocity is generally constant. Why are parabolas important in real life? The parabola has many important applications, from the design of automobile […]

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 […]

What is the unique features of water transport?

What is the unique features of water transport? The three main characteristics of water transport are that it is slow, that it can carry large loads, and that it is relatively cheap. Modern ships can carry huge loads of cargo without using very much fuel per unit of cargo. This makes this type of transport […]

What happens when a diver gets the bends?

What happens when a diver gets the bends? Decompression sickness: Often called “the bends,” decompression sickness happens when a scuba diver ascends too quickly. Divers breathe compressed air that contains nitrogen. At higher pressure under water, the nitrogen gas goes into the body’s tissues. Will the bends go away on its own? In some cases, […]

Does cruise control use more gas?

Does cruise control use more gas? Absolutely. If you’re cruising along a mostly level highway, electronics generally are far better at avoiding the little speed-up/slow-down events that are inevitably caused by a weary accelerator ankle or an inattentive mind. Is Cruise Control really necessary? In the long run, like on long highway journeys, cruise control […]

Why can you not fart in space?

Why can you not fart in space? The lack of gravity in space means the air in astronauts’ stomachs doesn’t separate from ingested food, so burping could expel more than just gas. Spaceflight missions also avoid serving high-flatulence foods, like Brussels sprouts and cabbage, to avoid “flammable butt gas” that’s hazardous in pressurized cabins. What […]

How do I refine a Google search?

How do I refine a Google search? Refine image searches Go to Advanced Image Search. Use filters like region or file type to narrow your results. At the bottom, click Advanced Search. How do you search smartly on Google? Here are some tips to search smarter so you can find what you’re really looking for. […]

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