Hai điện tích q1 = 2. 10 – 9 C, q 2 = - 8.10 – 9C đặt tại hai điểm A, B trong chân không cách nhau một khoảng AB = 10 cm. Hãy xác định cường độ điện trường tại điểm a) C với CA = 2 cm, CB = 8 cm.
b) D với DA = 2 cm, DB = 12 cm.
c) M với MA = 6 cm, MB = 8 cnm.
d) N với NA = NB = 10 cm.

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents

Awheel of mass 48 kg is lifted to a height of 0.8 m. how much gravitational potential energy is added to the wheel? acceleration due to gravity is g = 9.8 m/s2. a. 30.4 j b. 3.1 j c. 297.9 j d. 11,321 j

Lightning is an example of what phenomenon? a release of a large amount of energyan absorption of a large amount of energya natural electric circuita natural electric current