Diameter of a penny = 20 mm = 0.02 m
Thickness of a penny = 1.52mm = 1.52e-3 m
Effective volume occupied = 0.02*0.02*1.52e-3 m^3
number of Pennie = volume of box/volume of a penny
= 0.3048^3/[0.02*0.02*1.52e-3]
= 46573 = about 5*10^3
option c is correct
14) Estimate the number of pennies that would fit in a box one foot long by...
GOAL Estimate the number of stacked objects required to reach a given helght. PROBLEM How many one-dollar bills, stacked one on top of the other, would reach the Moon? STRATEGY The distance to the Moon is about 400,000 km. Guess at the number of dollar bills in a millimeter, and multiply the distance by this number, after converting to consistent units SOLUTION 10 bills 103 mm 1 mm 1 nm 103 m 1 km We estimate that ten stacked bills...
Need Help?Read Rand It 19.09 points SerCP9 1.CQ.005 (a) Estimate the number of times your heart beats in a month. O 102 O 104 O 106 e 108 (b) Estimate the number of human heart beats in an average lifetime. 105 107 109 1011 Need Help? Read Talk to a Tutor PREMIUM SOUND
How long does it take, in seconds, to electrolyze 1 mole of water in acidic solution at a current of 10 amperes? Given: O2 (g) + 4 H+ + 4 e- → 2 H2O 2 H+ + 2 e- → H2 (g) A. 3.9 x 104 B. 1.9 x 104 C. 7.7 x 104 D. 4.8 x 103 E. 9.7 x 103
How long would it take NASA to retrieve images from a satellite near Jupiter if Jupiter is 9.68 X 10 8 km from Earth? A. 3.2 x 103 s B. 1.0 x 108 s C. 2.1 x 102 s D. 6.1 x 1011 s
Just need the answer to this one 1. How much heat is released at constant pressure if a 20.0-L tank containing 59.0 atm of hydrogen sulfide gas condenses at its boiling point of -60.0°C? The enthalpy of vaporization of hydrogen sulfide is 18.7 kJ/mol at-60.00. (R A) 4.48 x 106 J B) 2.77 x 102 C) 7.81 x 101 D) 1.26 x 106 J E) 1.87×104 J 0.0821 L·atm/(K·mol))
32. Work this dilution problem, solve for the number of colony forming units (cfu) in one mL of the E. coli sample. ml 1 ml. 1ml. 1ml. 1m. 1 ml A 2 a. 6.3 x 10 b. 6.3 x 10 c. 4.43 x 106 9 ml. 9 ml. d. 4.43 x 103 9mL Sample of E. coll 443 63 colonies colonles
Below are the Kcat and Km values for 5 hypothetical enzymes. Which enzyme would have the largest specificity constant? Enzyme A - Kcat = 2.6 x 103 , Km = 4 x 10-4 Enzyme B - Kcat = 9 x 102 , Km = 6.1 x 10-6 Enzyme C - Kcat = 1.7 x 10-3 , Km = 3.2 x 105 Enzyme D - Kcat = 2.6 x 10-7 , Km = 4 x 104 Enzyme E - Kcat =...
Due Sunday. Apr 14 All answers will be saved automatically pm PDT All Question1 A high school teacher is interested to compare the average time for students to complete a standardized test for three different classes of students The teacher coll classes and the dataset is provided below. lects random data for time to complete the standardized test (in minutes) for students in three different The teacher is interested to know if the average time to complete the standardized test...
12. A slab on grade measures 120 long x 60" wide x 2' 6" thick. What is the cost to form the slab if formwork costs S1 per square foot of contact area? A. $72 B.S90 C.S162 D.S180 13. A place concrete' activity requires the placement of 2,080 cubic yards. If the individual production rate is 2 cubic yards per workhour per person, with a 10-person crew and 8-hour workday, how many days are needed to complete this activity? A....
Hildreth Company uses a job order cost system. The following data summarize the operations related to production for April, the first month of operations: a. Materials purchased on account, $3,290. b. Materials requisitioned and factory labor used: Job No. 101 102 103 104 105 106 $1,860 2,270 1,510 S,100 3,240 2,360 $3,240 4,370 2,140 8,040 6,120 3,890 4,800 For general factory use c. Factory overhead costs incurred on account, $3,550. d. Depreciation of machinery and equipment, $2,300. e. The factory...