Planet-x has a mass of 3.23x 1024 kg and a radius of 8980 km. what is the first cosmic speed i. e. the speed of a satellite on a low lying circular orbit around this planet? (planet-x doesn't have any atmosphere.) 4.90 km/s you are correct. your receipt no. is 154-7248 previous tries what is the second cosmic speed i. e. the minimum speed required for a satellite in order to break free permanently from the planet? 6.93 km/s you are correct. your receipt no. is 154-3204 previous tries if the period of rotation of the planet is 14.9 hours, then what is the radius of the synchronous orbit of a satellite?

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin.answer in one word.part bfind e(r), the magnitude of the electric field at distance r from the point charge q.express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q.express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r