An office worker uses an immersion heater to warm 237 g of water in a light, covered, insulated cup from 20°c to 100°c in 6.00 minutes. the heater is a nichrome resistance wire connected to a 120-v power supply. assume that the wire is at 100°c throughout the 6.00-min time interval. (a) calculate the average power required to warm the water to 100°c in 6.00 min. (the specific heat of water is 4186 j/kg · °c.)

You are driving to the grocery store at 20 m/s. you are 110m from an intersection when the traffic light turns red. assume that your reaction time is 0.50s and that your car brakes with constant acceleration. how far are you from the intersection when you begin to apply the brakes? what acceleration will bring you to rest right at the intersection? how long does it take you to stop after the light changes? the known values: vi=20m/s xi=110m t=.50s vf=0m/s xf=0m a=?