In Niels Bohr's 1913 model of the atom, the electron is in a circular orbit around a nucleus. An electron is 5.70 x 10-11 m from a nucleus traveling in a circular orbit with a speed of 2.15 x 106 m/s. What is the magnitude of the magnetic moment due to the electron's motion?

A rod and two balloons A very thin glass rod 4 meters long is rubbed all over with silk cloth. It gains a uniformly distributed charge 1.2 x 10-6 C. Two small spherical rubber balloons of radius 1.2 cm are rubbed all over with wool. They each gain a uniformly distributed charge of -4 x 10-8 C. The balloons are near the midpoint of the glass rod, with their centers 3 cm from the rod. The balloons are 2 cm apart (4.4 cm between centers). Length 4 m (drawing not to scale) 2 cm 3 cm Radius 1.2 cm 0,6 cm (a) Find the net electric field at the location marked by the x, 0.6 cm to the right of the center of the left balloon. Things to think about: Which objects make nonzero contributions to E at this location? What are the correct distances from sources to the observation location? What is the direction ofE due to the rod? (The drawing is not to scale; read the problem statement carefully. Assume the +x axis is to the right, the +y axis is up, and the +z axis is out.) N/C What approximations…

Copper is a typical face-centered-cubic metal. In its pure state, it has extremely high electrical conductivity. Oxygen in copper causes a major reduction of conductivity. To investigate this issue further, I want to you to tell me whether oxygen atoms substitute for copper atoms, or if they enter interstitial sites.

العنوان не 100 kN 45 50 kN/m 2 1 m 1 m 3 m Figure 6.20 Example 6.5. ۲/۱ سهرة Find the reaction about point a and b