The Arecibo radio telescope in Puerto Rico is observing the radio spectrum of a distant star. It observes an anomaly at a frequency of 490 MHz. What wavelength of
light does this correspond to in base SI units?

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents