The current required to stimulate the heart during ventricular fibrillation is about 110ma (1000ma = 1a). assuming that a conducting gel is used in conjunction with a defibrillator to overcome skin resistance, so that the main resistance of the body to an applied voltage is solely due to the internal resistance of the body, which is roughly around 300 ohms, what voltage is required for defibrillation? (note, the actual value used is 10-100 times this since the skin's large resistance cannot necessarily be neglected.)

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

This is the substance(s) formed in a chemical reaction.

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?