Trong chân không có 2 điện tích điểm q1=3.10^-6C và q2=-6.10^-C đặt tại vị trí A và B tương ứng cách nhau 100cm. Tính lực điện thành phần và tổng hợp do q1, q2 tạo thành

Starting with only the balmer series light (visible light), how could we ensure that the solar panels generate a current that mark can use for his power station? a)by gradually increasing the brightness (amount) of light that we shine on it. b)by gradually increasing the frequency of the light we shine on it. c)by gradually increasing the wavelength of the light that we shine on it.

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

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=?