Akid is on a stationary sled, on snowy ground with us=0.125. it takes 71.2n of force to get the sled moving. how much normal force is acting?

Which statement correctly describes the relationship between frequency and wavelength?

Atotal charge of –6.50 µc is uniformly distributed within a sphere that has a radius of 0.150 m. what is the magnitude and direction of the electric field at 0.300 m from the surface of the sphere? a) 2.89 × 105 n/c, radially inward b) 6.49 × 105 n/c, radially outward c) 4.69 × 105 n/c, radially inward d) 9.38 × 105 n/c, radially outward e) 1.30 × 106 n/c, radially inward

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.