A corona is the outermost layer of the solar atmosphere mainly visible during a solar eclipse. It can reach up to 1 million degrees Celsius. But the sun is 6000 degrees Celsius. How can heat flow from a cooler body to a hotter body. This goes against the laws of thermodynamics

An implanted pacemaker supplies the heart with 72 pulses per minute, each pulse providing 6.0 v for 0.65 ms. the resistance of the heart muscle between the pacemaker’s electrodes is 550 ω. find (a) the current that flows during a pulse, (b) the energy delivered in one pulse, and (c) the average power supplied by the pacemaker.

The summit of chimborazo, in ecuador, which is at a distance of about 6,384 km from the earth’s center. the bottom of the mariana trench, in the western pacific ocean, which is nearly 6,370 km from the center of the earth. on the surface of earth on the equator line.

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.