The escape speed from the Earth is 1.12 × 10 4 m/s, so that a gas molecule travelling away from Earth near the outer boundary of the Earth’s atmosphere would, at this speed, be able to escape from the Earth’s gravitational field and be lost to the atmosphere. At what temperature is the average speed of ( a ) oxygen molecules, and ( b ) helium atoms equal to 1.12 × 10 4 m/s? ( c ) Can you explain why our atmosphere contains oxygen but not helium?
The escape speed from the Earth is 1.12 × 10 4 m/s, so that a gas molecule travelling away from Earth near the outer boundary of the Earth’s atmosphere would, at this speed, be able to escape from the Earth’s gravitational field and be lost to the atmosphere. At what temperature is the average speed of ( a ) oxygen molecules, and ( b ) helium atoms equal to 1.12 × 10 4 m/s? ( c ) Can you explain why our atmosphere contains oxygen but not helium?
The escape speed from the Earth is 1.12 × 104 m/s, so that a gas molecule travelling away from Earth near the outer boundary of the Earth’s atmosphere would, at this speed, be able to escape from the Earth’s gravitational field and be lost to the atmosphere. At what temperature is the average speed of (a) oxygen molecules, and (b) helium atoms equal to 1.12 × 104 m/s? (c) Can you explain why our atmosphere contains oxygen but not helium?
13.
After a gust of wind, an orb weaver spider with a mass of 35 g, hanging on a strand of web of length L = .420 m, undergoes simple harmonic motion (SHO) with an amplitude A and period T.
If the spider climbs 12.0 cm up the web without perturbing the oscillation otherwise, what is the period of oscillation, in Hz to three significant figures?
15.
An object of mass m = 8.10 kg is attached to an ideal spring and allowed to hang in the earth's gravitational field. The spring stretches 23.10 cm before it reaches its equilibrium position. The mass then undergoes simple harmonic motion with an amplitude of 10.5 cm.
Calculate the velocity of the mass in m/s at a time t= 1.00s to three significant figures.
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