Practice Homework 1 - practice 01 ALIBHAI ZAHID Latest...

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practice 01 – ALIBHAI, ZAHID 1 Latest unpenalized work: Jan 22 2007 Mon- day 04:00 (after this date you can not make a perfect score). Work cutoff: Jan 21 2007, 4:00 am. Question 1 part 1 of 1 10 points A newly discovered giant planet has an av- erage radius 19 times that of the Earth and a mass 201 times that of the Earth. Calculate the ratio of the new planet’s den- sity to the Earth’s density. Answer in units of . Question 2 part 1 of 1 10 points A sphere of metal has a radius of 6 . 3 cm and a density of 6 . 88 g / cm 3 . What is the mass of the sphere? Answer in units of g. Question 3 part 1 of 1 10 points A cylinder, 16 cm long and 8 cm in radius, is made of two different metals bonded end- to-end to make a single bar. The densities are 4 . 6 g / cm 3 and 6 . 1 g / cm 3 . 16 cm 8 cm What length of the lighter metal is needed if the total mass is 17741 g? Answer in units of cm. Question 4 part 1 of 4 10 points Consider the following accepted constants: Radius of the moon=1 . 74 × 10 6 m. Radius of the sun=6 . 96 × 10 8 m. Average moon-earth distance=3 . 84 × 10 8 m. Average sun-earth distance=1 . 496 × 10 11 m. a) What is the apparent angle the diameter of the moon subtends, as seen from the earth, in radians? Answer in units of rad. Question 5 part 2 of 4 10 points b) What will the result be in degrees? Answer in units of . Question 6 part 3 of 4 10 points c) What is the apparent angle the diameter of the sun subtends, as seen from the earth, in radians? Answer in units of rad. Question 7 part 4 of 4 10 points d) What will the result be in degrees? Answer in units of . Question 8 part 1 of 2 10 points A glacier advances at 7 . 8 × 10 6 cm / s. How far will it move in 56000 s? Answer in units of cm. Question 9 part 2 of 2 10 points How far will it move in 5 . 8 years?
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