Why does rain make me feel safe?

Why does rain make me feel safe? Studies have found that when rain sounds enters people’s brain, brain unconsciously relaxes and produces alpha waves, which are very close to the state of brain when human sleeps. Rain sound is generally between 0 and 20 kHz. It is not upsetting. On the contrary, this sound makes […]

Does helium go bad?

Does helium go bad? No, helium does not expire. You must close the valve tightly or helium will leak over time. Are Balloon Time tanks recyclable? What weight can helium lift? Helium atoms weigh less than the oxygen and nitrogen atoms in the air. Helium has a lifting force of about one gram per litre. […]

Does drag force increase as velocity increases?

Does drag force increase as velocity increases? The downward force of gravity remains constant regardless of the velocity at which the person is moving. However, as the person’s velocity increases, the magnitude of the drag force increases until the magnitude of the drag force is equal to the gravitational force, thus producing a net force […]

Which mineral test is shown in the image 2 points image showing minerals that have been rubbed against a white board leaving different colored lines on the board?

Which mineral test is shown in the image 2 points image showing minerals that have been rubbed against a white board leaving different colored lines on the board? Streak test is a method to determine what color would the mineral had if it’s being transformed into a powdered form. This test is being done by […]

What frequency makes you smarter?

What frequency makes you smarter? The highest frequency brain waves are apparently called gamma waves. These waves can have a frequency of anywhere between 25 and 100 Hz. People whose brains produce more gamma waves are said to have greater ability to concentrate, focus and experience higher levels of cognition. Will reading increase IQ? It […]

What is the purpose of a spectrograph?

What is the purpose of a spectrograph? A spectrograph is an instrument that separates incoming light by its wavelength or frequency and records the resulting spectrum in some kind of multichannel detector, like a photographic plate. Many astronomical observations use telescopes as, essentially, spectrographs. What are spectral features of an image? Spectral features of images, […]

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