Use of English 9 Choose the correct answers. 3 The Inuit people! in northern Canada, Alaska, Greenland, and in the north of Russia. Here the temperature is very? - it can go down to -50°C. The Inuit usually modern clothes, like jeans, T-shirts and jumpers. But because it's the first day of spring. Many of the Inuit people 5 traditional clothes, such as coats made of animal skins. They've got animal-skin 6 on their feet, too. Some of the women have got beautiful belts of many colours. What ? in cold weather in today is 4 7 your country? c lives c small C wear c special 1 a live 2 a high 3 a wears 4 a artificial 5 a are wearing 5 a boots a dark a are you wearing b is living blow b are wearing b ordinary b wear b leggings b patterned b do you wear C Wears c trousers c plain C you wear

Asmall blob of putty of mass m falls from the ceiling and lands on the outer rim of a turntable of radius r and moment of inertia i0 that is rotating freely with angular speed ω0 about its vertical fixed-symmetry axis. (use any variable or symbol stated above as necessary.)

In a vernier instrument the main scale is in 1/2 mm divisions .vernier is made by redividing 19 such divisions into 20 equal parts. calculate the least count of the instrument.

Some material consisting of a collection of microscopic objects is kept at a high temperature. a photon detector capable of detecting photon energies from infrared through ultraviolet observes photons emitted with energies of 0.3 ev, 0.5 ev, 0.8 ev, 2.0ev, 2.5ev, and 2.8ev. these are the only photon energies observed. (a) draw and label a possible energy-level diagram for one of the microscopic objects, which has four bound states. on the diagram, indicate the transitions corresponding to the emitted photons. explain briefly. (b) would a spring–mass model be a good model for these microscopic objects? why or why not? (c) the material is now cooled down to a very low temperature, and the photon detector stops detecting photon emissions. next, a beam of light with a continuous range of energies from infrared through ultraviolet shines on the material, and the photon detector observes the beam of light after it passes through the material. what photon energies in this beam of light are observed to be significantly reduced in intensity (“dark absorption lines”)? explain briefly.