Tamsen and vera imagine visiting another planet, planet x, whose gravitational acceleration, gx, is different from that of earth's. they envision a pendulum, whose period on earth is 2.243 s, that is set in motion on planet x, and the period is measured to be 1.510 s. what is the ratio of gx/gearth? neglect any effects caused by air resistance. (gx/ge= if the average density of planet x is equal to earthes average density, pe, what is the ratio of rx/re, where re is the mean radius of earth? (assume both planets are spherical. recall that p= m/v and vsphere= 4/3 pi r^3.) (rx/re= ? )

explanation: magnetic pole, region at each end of a magnet where the external magnetic field is strongest. the south-seeking pole, or any pole similar to it, is called a south magnetic pole. unlike poles of different magnets attract each other; like poles repel each other.

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me