Your friend wants to go ice skating but is afraid she'll fall. You decide to gently push her with a force of 45N a distance of 9m. What kind of work is being done by the pushing force?

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge