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Subject: Earth & Life Sciences (Grade 11 (SHS))
Question: How minerals can be used as indicators of specific environmental parameters? Justify your answer. (3 sentences only.)
How does the Shoot System and Root System of a plant shows interconnection?
If a given quantity of electricity liberates 0.65g of Zn2+, what amount of Hg2+ would be liberated by the same quantity of current?
[Zn = 65, Hg = 201]
A. 1.00g
B. 2.10g
C. 4.02g
D. 8.04g
Please show working
A furniture manufacturer makes two products - tables and chair. Processing of these products is done on two types of machine A and B. A chair requires 2 hours on machine type A and 6 hours on machine type B. A table requires 5 hours on machine type A and no hours on machie type B. There are 16 hours/day available on machine typeA and 30 hours /day on machine type B. Profits gained by manufacturer from chair and table are birr 2 and birr 10 respectively.
A what should be daily production of each of the two products?
B use graphical method of LPP to find the solution
What is the final pressure inside a scuba tank after it cools from 25°C to -10°C? The initial pressure in the
tank is 130 atm.
- Three lamps are rated 100 W, 50 W, and 10 W If each lamp is connected to a 220-V source, calculate the (a) current through each lamp and (b) resistance through each lamp.
- The resistance of a bulb is 50Ω. What is the current produced by a 24-V battery in the bulb? How many electrons does this current represent?
mathematics written work are normally distributed with a mean of 23 and standard deviation of 9. describe the sampling distribution of 15 students who are normally from this population
List all possible
samples and their
corresponding
means.
Samples of size 2 (4) Mean (4)
Calculate the entropy change when graphite burns insufficient supply of oxygen as to graphite has 5.7J/molK, O2 has 205J/molK and CO2 has 213.6J/molK
Balance the following equations.
1. Fe + O2 → Fe2O3
2. CS2 + Cl2 → CCl4 + S2Cl2
3. Fe + H2O → Fe3O4 + H2
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