Which planet is very hot because of an extreme greenhouse effect?

a) Mars
b) Earth
c) Venus
d) Mercury
e) Jupiter


Ans: c) Venus

Physics & Space Science

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A segment of wire carries a current of 25 A along the x axis from x = ?2.0 m to x = 0 and then along the z axis from z = 0 to z = 3.0 m. In this region of space, the magnetic field is equal to 40 mT in the positive z direction. What is the magnitude of the force on this segment of wire?

a. 1.0 N b. 5.0 N c. 2.0 N d. 3.6 N e. 3.0 N

Physics & Space Science

In vacuum, the components of an EM wave are and 0. In what direction is this wave moving?

A. positive x-direction B. negative x-direction C. positive y-direction D. negative y-direction E. positive or negative z-direction

Physics & Space Science

Why can't the carbon dioxide cycle easily correct for the increasing amounts of carbon dioxide introduced into our atmosphere by industrialization?

A) it operates far too slowly to correct for any short-term changes B) pollution has stopped the carbon dioxide cycle from operating C) the carbon dioxide cycle only influences carbon dioxide produced by natural sources D) it operates far too quickly to correct for any short-term changes

Physics & Space Science

The ______________ effect provides evidence of motions within other planetary systems

Fill in the blank(s) with correct word

Physics & Space Science