blue charge, Q = 7.9 C with mass M = 3.8 kg,  hangs from a red string of length 1.5 m as shown below.  With the mass stationary, the string makes an angle of θ = 41 degrees with respect to the horizontal when a red charge q1 is brought a horizontal distance 1.2 m away.  Determine the charge q1, in nC, necessary to do this

The figure below shows two charged particles separated by a distance of d = 1.50 cm. The charges are ₁ = -15.5 nC and 92 = 26.5 nC. Point B is at the midpoint between the two charges, and point A is at the peak of an equilateral triangle, with each side of length d, as shown. (Assume the zero of electric potential is at infinity.) d d A 60.0⁰ B d (a) What is the electric potential (in kV) at point A? kV (b) What is the electric potential (in kV) at point B? kV

In Niels Bohr's 1913 model of the hydrogen atom, an electron circles the proton at a distance of 5.29 x 1011 m with a speed of 2.19 x 10° m/s. Compute the magnitude of the magnetic field this motion produces at the location of the proton. T

Find V, in the circuit in Fig. 4 60,00 € ΦΩ 1:2 + Figure .4 8 Ω Το Τ ΖΩ 8 Ω