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1.A cloud of neutral hydrogen is moving towards us at a speed of 70 kilometers per second. At what wavelength would one observe the radio spectral line characteristic of neutral hydrogen? 2. The filament in a regular incandescent light bulb reaches a temperature of 2900 k when it's on. a...

why does your hand not feel the radiant heat energy from a fireplace if you place it behind a sheet of glass, even though you can see the fire very easily?

What is limiting reagent

In the preparation of acetanilide why is it that zinc dust is used?

What is the formula for calculating the speed of thought? Also the speed of a thought sent and received from a human brain?

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please help me to understand moment of inertia