The Earth is not a perfect sphere because it is spinning with respect to most of the universe. The Sun and Moon raise tides on this body and its oceans that drag and exert friction on the planet as it rotates, and the Sun and Moon exert torques on the planet too because of the equatorial bulge. Pick the consequences that:. a. The Moon moving farther away from Earth to conserve system total angular momentum.
b. A speeding up of Earth's rotation.
c. A lengthening of the day by a second every few years.
d. The direction of Earth's axis precessing around the plane of its orbit.

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.

Researchers conducted an experiment to identify the effects of three different hand sanitizers on the growth of bacteria. the researchers grew one type of bacteria in twenty-four identical covered petri dishes. then, they opened eighteen petri dishes and applied the three hand sanitizers to six petri dishes each. they left the remaining six petri dishes closed as a control group. when the researchers measured the growth of bacteria two days later, the six dishes that had no hand sanitizer showed the least amount of bacterial growth. the researchers concluded that not using any hand sanitizer would lead to the least bacterial growth. which statement best explains why the researchers’ conclusion was not justified? the experiment tested too many variables. the control group was not treated the same as the experimental group. the sample size of twenty-four petri dishes is not large enough. the single type of bacteria is not adequate to make any conclusions.

Thermal radiation gets its name because