What is the approximate uncertainty in the area of a circle of radius 4.7×104cm?

A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit:

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?