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Ostrovityanka [42]

3 years ago

14

James decides to walk home from school today. He lives 3 miles from school and can walk home in 45 minutes. At what rate is Jame

s traveling?
A) 1 mile/10 minutes
B) 1 mile/15 minutes
C) 1 mile/20 minutes
D) 1 mile/30 minutes

1 answer:

Kaylis [27]3 years ago

3 0

B 1 mile/15 minutes is the right one

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What is a likely consequence of continued human population growth

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Answer:

Rapid human population growth has a number of consequences. Population grows fastest in the world's poorest countries. High fertility rates have historically had a strong relation with poverty, and high childhood mortality rates

Explanation:

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A gamma ray photon has an energy of 0.91 GeV. (1 GeV = 109 eV.) What is the wavelength of the gamma ray in fm? (1 fm = 10-15 m)?

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$\lambda=1.37 fm$

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A) 8.11 m/s

For a satellite orbiting around an asteroid, the centripetal force is provided by the gravitational attraction between the satellite and the asteroid:

$m\frac{v^2}{(R+h)}=\frac{GMm}{(R+h)^2}$

where

m is the satellite's mass

v is the speed

R is the radius of the asteroide

h is the altitude of the satellite

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M is the mass of the asteroid

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B) 11.47 m/s

The escape speed of an object from the surface of a planet/asteroid is given by

$v=\sqrt{\frac{2GM}{R+h}}$

where:

$G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2}$

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