Hai điện tích q1 = 6.10-6C và q2 = - 4.10-6C đặt cách nhau 20 cm trong không khí. Hai điện tích này sẽ:

Awave travels at a speed of 5.2 m/s. if the distance between crests is 0.40 m, what is the frequency of the wave? use f=v/wavelength a. 13 hz b. 2.1 hz c. 0.077 hz d. 5.6 hz

Which levels of government establish and implement educational requirements for minors

The vapour pressure of benzene is 53.3 kpa at 60.6 °c, but it fell to 51.5 kpa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. calculate the molar mass of the compound.