Why are most meteorites found in Antarctica?
What will be an ideal response?
Meteorites are generally very dark and stand out against the bright icy surface of the Antarctic. There is no vegetation to hide them and snow is rare, so they are remain visible for a long time. Further, glaciers tend to funnel rocks on their surface into a small area, increasing the concentration of meteorites in certain areas.
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A charged particle is traveling through a uniform magnetic field. Which of the following statements are true of the magnetic field? There may be more than one correct statement
1.It exerts a force on the particle parallel to the field. 2.It exerts a force on the particle along the direction of its motion. 3.It increases the kinetic energy of the particle. 4.It exerts a force that is perpendicular to the direction of motion. 5.It does not change the magnitude of the momentum of the particle.
A truck is using a hook to tow a car whose mass is one quarter that of the truck. If the force exerted by the truck on the car is 6000 N, then the force exerted by the car on the truck is
A) 12000 N. B) 24000 N. C) 1500 N. D) 6000 N. E) We need to know if the car is accelerating to answer this question.
In Brazil, the longest period of daylight occurs during the month of
a. December. c. September. b. March. d. June.
which of the following is true about science
a) In science knowledge is advanced by experiments which must be repeatable by competent observers b) In science once something is proven as a fact, it is a fact forever as science does not change in time c) A theory in science is just a guess about what is going on