If wire XY of resistance = 2 ohms is replaced by another wire AB of the same material. Wire AB has double the cross-section area and half the length of that of XY. Calculate the resistance of wire AB

If a hiker that weighs 600 newtons climbs a 50 meter hill, how much gravitational potential energy has the hiker gained?

The gravitational force between pluto and charon is 3.61 × 1018 n. pluto has a mass of 1.3 × 1022 kg, which is only slightly greater than charon’s mass of 1.6 × 1021 kg. how far apart are pluto and charon? 2.0 × 107 m 2.4 × 1012 m 3.8 × 1014 m 5.8 × 1024 m

The earth orbits a start called the