The emission of longwave radiation by the atmosphere towards the Earth's surface is termed
What will be an ideal response?
counter radiation
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For uniformly accelerated motion, which of the following quantities must be zero?
a. the initial acceleration b. the initial velocity c. the initial displacement d. the time rate of change of the acceleration e. the time rate of change of the velocity f. the time rate of change of the displacement
The equilibrium interatomic separation between two atoms is determined by setting the derivative of the interatomic pair potential with respect to separation equal to ______________.
Fill in the blank(s) with the appropriate word(s).
Electrons in an x-ray machine are accelerated from rest through a potential difference of 80,000 V. What is the kinetic energy of each of these electrons in eV?
a. 128 eV c. 80 eV b. 40 eV d. 80 keV
A conducting rod (length = 80 cm) rotates at a constant angular rate of 15 revolutions per second about a pivot at one end. A uniform field (B = 60 mT) is directed perpendicularly to the plane of rotation. What is the magnitude of the emf induced between the ends of the rod?
a. 2.7 V b. 2.1 V c. 2.4 V d. 1.8 V e. 3.3 V