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.

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

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.

An object is at a certain height above the ground. If the object's mass is 15 kg and its potential energy is 540 J. then at what height the object is with respect to the ground. (Consider the value of g =10 m/sz.)

A raindrop falls from a height of1 km. If the mass of this drop is 1.00 g and it hits the ground with a speed of 60 m/s. then what is the work done by the unknown resistive forces?

Consider that three charges -4 x10‘9C. +6 x10‘9C, and -8 x10‘9C are placed at the vertices of an equilateral triangle XYZ. The sides of the triangle are 40 cm each. If X1, Y1, 21 are the mid points of the sides of the triangle. then what is the work done in shifting the charges X. Y and Z to X1. Y1. 21. respectively?

Organisms that are poikilothermic _______.

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

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

Recycled energy is mainly _______.

Programs such as ____ support energy conservation for electronic devices.