You intend to move a rectangular loop of wire into a region of uniform magnetic field at a given speed so as to induce an emf in the loop. The plane of the loop must remain perpendicular to the magnetic field lines. In which orientation should you hold the loop while you move it into the region with the magnetic field to generate the largest emf?
1.with the long dimension of the loop parallel to the velocity vector
2.with the short dimension of the loop parallel to the velocity vector
3.Either way because the emf is the same regardless of orientation.
2
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Determine the temperature at the four nodes shown in the sketch. Assume steady conditions and two-dimensional heat conduction. The four faces of the square shape are each at different temperatures as shown.
GIVEN
Square shape with four different face temperatures
FIND
Temperature at four interior nodes
SKETCH
Venus and Earth started out with roughly the same amount of water. While Earth still has water in abundance, all of Venus' was lost. Where did it go?
A) It chemically combined with CO2 to form H2CO3.
B) Ultraviolet rays split the hydrogen from the oxygen components, and the hydrogen escaped into space.
C) It all evaporated into space due to the intense daytime heat of 470°C.
D) Scientists are still trying to determine this.
Which is not a fundamental particle?
A) photon B) nucleus C) lepton D) up quark E) electron
Draw a diagram showing how temperature varies with altitude in a generic planetary atmosphere. Label each of the major layers (i.e., thermosphere, stratosphere, troposphere)
What will be an ideal response?