Cell membranes contain channels that allow ions to cross the phospholipid bilayer. suppose that a particular potassium channel carries a current of 2.0 pa. how many potassium ions (k ) pass through it in 1.0 ms

Ascientist is tracking an object orbiting the sun that is found between mars and jupiter. in order to classify the object as an asteroid, it must be at least

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a. true or b. false