A lightbulb illuminates a surface distance of 1.00 meters away with an illuminance of 1800 lux. What would be the illuminance on a surface 0.50 meters away if illuminated by the same bulb?

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?