Which of the following is true of compasses ? A. compass magnets can be deflected by Earth's magnetic field or other permanent magnets .
B. compasses detect fluctuations in convection in the mantle.
C. compasses always point toward geographic north.
D. compass magnets can only be deflected by electromagnets such as Earth's magnetic field.​

A-of 75 cm by cm by 17.5 cm up. of is 2 kg a , in ,if it is in , kg/?

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.

What is the main difference between the atmospheres of jupiter and neptune? a. neptune does not have hydrogen and helium. b. jupiter does not have hydrogen and helium. c. jupiter has methane clouds. d. neptune has methane clouds.