Through radar observations and applying the doppler effect it was found that venus

What is the measurement of how fast an object moves relative to a reference point?

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?