Cho hai điện tích q1=q2=8.10^-7 C đặt cách nhau 5cm. Xác định cường độ điện trường tại điểm: a. Cách q1=2cm, q2=3cm
b. Cách q1=5cm, q2=10cm
c. Cách q1=5cm, q2=5cm
d. Cách q1=4cm, q2=3cm

1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?