Observations of radio waves from astronomical objects suffer from poorer resolution than visible observations with the same size dish (or mirror) because Observations of radio waves from astronomical objects suffer from poorer resolution than visible observations with the same size dish (or mirror) because radio telescopes don't use solid mirrors. it is very difficult to detect radio waves. the signals are so weak in the radio region. radio telescopes are generally much smaller in diameter than optical telescopes. the wavelength of radio waves is much longer than the wavelengths of visible light.

Which of the following is not am example of a polymer? protein nylon kevlar concreta

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?