Questions

The first oil well was dug in 1859. The oil production has since declined but it retains its name for high grade oil

The Quality Factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. higher the Q, the lower are the losses.

the quality factor is measurement of efficiency (or effectiveness) of a device or circuitry. In literal sense quality factor means qualitative performance of a device.

The process which involves absorption of heat is endothermic.

Here given all the options are involving in absorption of heat. Hence, all the above are endithermic.

China has built an 'artificial sun' that reaches 100million °C, 6 times temperature of Sun’s core.

Delhi state police has launched e-learning portal 'Nipun' for training all its police officers to give up to date information through specialized courses designed by experts.

We know that the circulatory system of our body is a loop. The Heart is the pump, the arteries and their smaller branches (arterioles) carry oxygen rich blood all through your body tissues from the heart and the veins and their smaller branches (venules) carry oxygen depleted blood and waste products back to the heart from all the body parts.