A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle. (a) How much force is required to hold a d_1-cm-diameter hose delivering Q through a d_2-cm-diameter nozzle

The air that we breath is made mostly of which gaseous molecule

The government has declared that a hurricane is likely to hit the east coast. which government division is part of acf and provides guidance to citizens? a. job opportunities for low-income individuals b. office of human services emergency preparedness and response c. assets for independence d. low-income home energy assistance program

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.