Test ques(on Heat can be transported by A: x radia(on only B: x convec(on only C: x conduc(on only D: v all of the above

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1 Test ques(on Runner Twiddle Dee can complete a 400 meter track in one minute. His twin brother Twiddle Dum can do so in twice the (me. Twiddle Dee s kinec(c energy is a) V Four (mes that of Twiddle Dum b) X Twice that of Twiddle Dum c) X Same as that of Twiddle Dum d) X Half that of Twiddle Dum

2 Test ques(on Humpy climbs 12 meters from the ground to the fourth floor of the King s tower. Dumpy climbs 36 meters from the ground to the 12 th floor. Rela(ve to the ground, poten(al energy gained by Humpy is a) X 12 (mes that of Dumpy b) X 3 (mes that of Dumpy c) X Same as that of Dumpy d) V 1/3 that of Dumpy

3 Test ques(on When a hot air balloon is heated to double its temperature, but to keep its volume, the pressure inside the balloon would A:v double B: x remain the same C: x reduce to half D: x reduce to one quarter

4 Test ques(on Heat can be transported by A: x radia(on only B: x convec(on only C: x conduc(on only D: v all of the above

5 Test ques(on Hydrogen atoms make a transi(on from ground to excited state when they are A: x cool down below 273 K B: x react with oxygen to form water molecules C: x spontaneously over millions of years D: v heated to several thousand degrees

6 TEST QUESTION Most large modern ground-based op(cal telescopes are reflec(ng (rather than refrac(on) telescopes primarily because A: x they provide clearer pictures B: x they are cheaper to build C: x they provide bigger magnifica(on D: v they can be built with less glass so that they are less likely to be distorted by their own weight

7 Test ques(on Space telescopes are useful because A) X They are closer to distant planets and stars B) X Gravity is reduced in space C) V Bypass atmospheric absorp(on of photons in certain wavelength ranges D) X Sky is darker in space

8 Test ques(on Jupiter s distance to the Sun is five (mes that of the Earth. The Sun s intensity seen on Jupiter is A: x five (mes smaller than that on the Earth B: x same as that on the Earth C: x five (mes larger than that on the Earth D: v twenty five (mes smaller than that on the Earth.

9 Test Ques(on 3.5.4: A distant galaxy is moving away from the Earth at half the speed of light. The wavelength of its signature atomic hydrogen lines A: x remains unchanged B: v is double C: x is halved D: x is blueshiced

10 Test ques(on Wavelength of Ca emission lines of a nearby star 51 Peg undergo a small amount of periodic sinusoidal changes once every 4 days. This is due to A) X the varia(on of 51 Peg mass B) V the reflex mo(on of the star due to an orbi(ng planet C) x internal oscilla(on of 51 Peg, and D) X Episodic wind from the surface of 51 Peg

11 Test ques(on Spectral lines from the atmosphere of distant planets provide valuable informa(on on their A: x atmospheric composi(on only, B: x atmospheric temperature only, C: x atmospheric rota(on only, D: v all of the above processes

12 Test ques(on During the transit of a planet COROT 2, (when it moves between its host star and the Earth), astronomers observed some dark lines in its hot star s spectrum. These lines appear dark because: A: v photons in them are absorbed by the planet s atmosphere, B: x they are emission lines from the planet, C: x black is the color associated with these wavelengths, D: x paths of the photons are bend by the planet s gravity

13 Test ques(on Star Vega is bluer than the Sun. Both stars are on the main sequence. In comparison to that of the Sun, Vega has a A) v hofer surface temperature, B) x smaller mass C) x longer life span D) x All the above

14 Test Ques(on Red giant star Betelgeuse has half the temperature and 16 (mes the radius as the Sun, its luminosity is a) V 16 (mes that of the Sun b) X Same as the Sun c) X ¼ that of the Sun d) X 4 (mes that of the Sun