Reflection and absorption by the atmosphere prevent some ____ from reaching earth's surface.

Regarding size radio waves have the _________ wavelength compared to the other types of ems.

Organisms that are poikilothermic _______.

The blueness of the daytime sky is due mostly to light _______.

Polycythemia results in _______.

The cosmic rays deflected most by earth's magnetic field are above the _________.

Two parallel wires are placed at a distance of 10 cm apart. The length of each of these wires is 5 m and they carry equal currents along the same direction. Find the current through the conductors, if they experience a mutually attractive force of 4.9 x104 N.

Which of the following options is the correct frequency band for FM broadcast in India?

Consider that a sample of 238U92 is undergoing o—decay. Its half-life is 4.5 x109 years. Find the activity 0f 1 g sample of 238U92.

What is the approximate energy associated with big bang?

Which of the following statements correctly states the Law of Conservation of Mechanical Energy?