A20-kg cart travels at 20 m/s in a circle with a radius of 20 m. what is the centripetal force?

20n

1n

400n

Along, straight wire with 3.0 a current flowing through it produces magnetic field strength 1.0 t at its surface. if the wire has a radius r, where within the wire is the field strength equal to 36.0% of the field strength at the surface of the wire? assume that the current density is uniform throughout the wire

There are weak or strong attractive forces between atoms of liquids with a high viscosity

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults