Which of these factors make hydrogen fuel cells a better option than burning fossil fuels? -Hydrogen fuel cells have a higher energy efficiency.
-Hydrogen fuel cells create less pollution.
-Burning fossil fuels relies on outdated devices and technology.
-Hydrogen is the most abundant element in the universe.
-Hydrogen fuel cells are more expensive than fossil fuels.

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )