What affects long-term climate change?
a. changes in the Sun’s brightness
b. changes in Earth’s reflectivity
c. change in the tilt of Earth’s axis
d. changes in greenhouse gas abundance
e. all of the above
Ans: e. all of the above
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In Earth's interior, does temperature increase or decrease with depth?
What will be an ideal response?
Two objects push on each other. The first object has a mass 30.0 kg and it accelerates at 2.00 m/s2 toward the east
The second object has a mass 7.00 kg. If no other forces are acting on the objects, what is the acceleration of the second object? A) 4.67 m/s2 west B) 1.14 m/s2 east C) 2.00 m/s2 west D) 8.57 m/s2 west E) 4.67 m/s2 east
According to quantum field theory, electrons
A) are the quanta of a matter field. B) are the quanta of the electromagnetic field. C) interact by exchanging quarks. D) always come in pairs. E) None of the above.
Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C After the 1 kg block of ice melts, the amount of heat required to raise its temperature to 10 °C is
a. 2,000 J. b. 4,000 J. c. 20,000 J. d. 40,000 J. e. 334,000 J.