Please take your time to these PCS211 questions carefully! Please don't forget to do the last part of question 1

1. [-/2 Points] DETAILS SERPSE10 1.1.P.001. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Calculate the average density of the following astronomical body: Mars. PMars kg/m 3 Where does the value fit among those listed in the table below? Look up the density of a typical rock, such as granite in another source and compare the density of Mars to it. This answer has not been graded yet. Table: Densities of Some Common Substances at Standard Temperature (0.C) and Pressure (Atmospheric) Substance p (kg/m3) Substance p (kg/m3) Air 1.29 Ice 0.917 x 103 Aluminum 2.70 x 103 Iron 7.86 x 103 Benzene 0.879 x 103 Lead 11.3 x 103 Copper 8.92 x 103 Mercury 13.6 x 103 Ethyl Alcohol 0.806 x 103 Oak 0.710 x 103 Fresh Water 1.00 x 103 Oxygen gas 1.43 Glycerin 1.26 x 103 Pine 0.373 x 103 Gold 19.3 x 103 Platinum 21.4 x 103 Helium gas 1.79 x 10- 1 Sea Water 1.03 x 103 Hydrogen gas 8.99 x 10-2 Silver 10.5 x 1034. [-/2 Points] DETAILS SERPSE10 1.3.P.009. MY NOTES ASK YOUR TEACHER Which of the following equations are dimensionally correct? (a ) VF = vi + ax O This equation is dimensionally correct. O This equation is not dimensionally correct. (b) y = (2 m) cos(kx), where k = 2 m-1 O This equation is dimensionally correct. O This equation is not dimensionally correct. Need Help? Read It9. [0/2 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A rectangular plate has a length of (19.0 + 0.2) cm and a width of (8.0 + 0.1) cm. Calculate the area of the plate, including its uncertainty. 152.0 X Check the number of significant figures. + 4.0 0.02 x cm2 More Information.10. [-/4 Points] DETAILS SERPSE10 1.6.P.020. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER How many significant figures are in the following numbers? (a) 190.0 + 0.1 (b) 7.00 x 107 (c) 4.35 x 10-9 (d) 0.0060 Need Help? Read It Watch It