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jnimagine
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I have a few questions about my hw...
1. Assume you visit a world where the atmosphere is made up of hydrogen. Your spacecraft can fly Mach 20 on Earth, as measured by sound at 5degreesC. On this planet, what is your Mach number if the speed of sound in hydrogen is 1267m/s?
2. What is the Mach number for a shuttle if it starts re-entry after traveling around Earth in 1.495h at an orbital radius of 6.73 x 10^6m?
Assume that the air temperature is -30degreesC.
3. On a hot summer night (32degreesC) you are listening to a rock group in a stadium 350m away. Your friend is sitting in an air-conditioned room across the country, listening to broadcast radio. If the signal travels 30,000km up to a satellite that retransmits it, who hears the concert first?
4. Determine the depth of water if an echo using sonar returs in 870ms and the speed of sound in water is 5300km/h
I tried to do these questions but i really can't figure it out... T.T
Any help would be appreciated...^^
Thank you
1. Assume you visit a world where the atmosphere is made up of hydrogen. Your spacecraft can fly Mach 20 on Earth, as measured by sound at 5degreesC. On this planet, what is your Mach number if the speed of sound in hydrogen is 1267m/s?
2. What is the Mach number for a shuttle if it starts re-entry after traveling around Earth in 1.495h at an orbital radius of 6.73 x 10^6m?
Assume that the air temperature is -30degreesC.
3. On a hot summer night (32degreesC) you are listening to a rock group in a stadium 350m away. Your friend is sitting in an air-conditioned room across the country, listening to broadcast radio. If the signal travels 30,000km up to a satellite that retransmits it, who hears the concert first?
4. Determine the depth of water if an echo using sonar returs in 870ms and the speed of sound in water is 5300km/h
I tried to do these questions but i really can't figure it out... T.T
Any help would be appreciated...^^
Thank you
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