# Questions Asked onJuly 2, 2020

1. ## Science

The influent flow (dwf) is 30,000 m3/day and the influent BOD concentration is 300 mg BOD/l. The suspended solid concentration in the influent is 150 mg/l of which 40% is removed in the primary clarifier, which agrees with about 20% BOD removal. The sludge

2. ## chemistry

I collected questions from my book which I don't understand plz help me I am stuck plzz.!!!!!!!! Three different solutions containing the same solute at the same temperature are made to be saturated. Beaker 1 has 200.0 mL, beaker 2 has 500.0 mL and beaker

3. ## Mathematics

A sector of a circle of radius 8cm is bent to form a cone.find the radius of the cone and its vertical angle if the angle subtended at the centre by the sector is 280

4. ## chemistry

chem help!! have to make a graph. need help plzz.. thank you!!!! fastttt!!. Make sure to label axes and title the graph. its A heating curve? Temperature measurements were taken every minute for 35 minutes. Table 1. Heating of Substance Y. Time(min)

5. ## science

The maximum lung capacity of an average adult is about 4-6 L. A scuba diver takes a breath of about 2.1 L of air at a depth of 30 m where the pressure is 405 kPa. If the diver holds his/her breath while rising to the surface, where the pressure is 102 kPa,

6. ## Maths

In a test Freya scores 25% more marks than Eva. Eva scores 50% more marks than Dominic. In total the three children score 140 marks. The test if out of 80. What percentage does Dominic score in the test?​

7. ## Physical Science

Consider three objects: A, B, and C. If A is positively charged, B repels A, and C is attracted by A, what can you say about the charge on B and C? A. B is positively charged and C is negatively charged. B. B is negatively charged and C is positively

8. ## Applied Maths

The odds against a volleyball team winning a game are 5:3. What is the probability, as a reduced fraction, that they will win the game?

9. ## physics

A 28 g bullet is traveling at 414 m/s when it strikes a block of wood. If the block of wood exerts a force of 50,000 N opposing the motion of the bullet, how far will the bullet penetrate the block of wood?

10. ## mathematics

Draw a flow chart to show what happens when you visit a library

11. ## mathematics

The sum of three consecutive numbers is 108.

12. ## Mathematics

Aldo can choose Plan A or Plan B for his long distance charges. For each plan, cost (in dollars) depends on minutes used (per month) as shown below. (I'll try to see if I can post the graph.) 1. If Aldo makes 60 minutes of long distance calls for the

13. ## algebra

an aircraft factory manufactures airplane engines. The unit cost c (the cost in dollars to make each airplane engine) depends on the number of engines made. If x engines are made, then the unit cost is given by the function c(x)=0.3x2- 96x+26,919. How many

14. ## physics

A mass of ideal gas of volume 400 cm3 at a temperature of 27 ˚C expands adiabatically until its volume is 500 cm3. Calculate the new temperature. The gas is then compressed isothermally until its pressure returns to the original value. Calculate the final

15. ## physics

Combining the statement written in question 19 with the mathematical statement of the 1st law of thermodynamics, show in not more than 6 steps that; du pdv T ds  1 

16. ## chemistry

From XNH3+YO2=ZNO+QH2O. find the value of Z?

17. ## English

what is the conflict in the book human touch by mitch album.

18. ## Mathematics

The mean height of 15 boys in a class is 162cm and the mean height of 10 girls is 152cm. Find the height of the 25 pupils.

19. ## Maths

Write the 1st 3 terms of the sequence whose n^th term is given by 2^n+1.

20. ## Applied Maths

Joseph is taking his driver’s test. The odds he will pass are 8 : 3. What are the odds against passing? A. 3 : 8 B. 8 : 11 C. 5 : 3 D. 3 : 11

21. ## mathematics

Calculate the sum of 7, 5, 3, 7, 6, 8 using a flow chart

22. ## Calculus

Determine the value(s) of k such that the angle between the vectors a= (1,1,k) and b=(1,0,1) is 45 degrees.

23. ## Calculus

Determine the value(s) of x such that the area of the parallelogram formed by the vectors a=(x+1, 1, -2) and b=(x,3,0) is the square root of 41.

24. ## Calculus

Chris pulled a sled 153 m by exerting a constant force of 225N at a constant angle of 65 degrees to the level ground. Find the work done in pulling the sled.

25. ## Algebra

Sorry to post the same question again, but I haven't gotten any answers on the last time I asked which was roughly 9 hours ago. Here's the question: We let g(x) = ⌊x⌊x⌋⌋ for x >= 0. Find the number of possible values of g(x) for 0

26. ## geometry

What is the equation of the line: * parallel to the line y = -¼x + 5 and * passing through the point (2, -1) y = -¼x + 4 y = ¼x + 2 y = ¼x - 1 y = -¼x - 1/2

27. ## geometry

What is the equation that is perpendicular to the line y=2x-3 and passes through the point (-6,5)? Show all of your work. y = 2x + 17 y = 1/2x + 8 y = -2x - 7 y = -1/2x + 2

28. ## English

WRITE CHARACTERSTICS OF HORSE PRESENT IN THE POEM SWIFT THINGS ARE BEAUTIFUL

29. ## physics

why an ice cube at 0 ˚C is more effective in cooling a drink than the same mass of water also at 0 ˚C

30. ## physics

A water vapour thermometer is calibrated at the ice and steam points and the saturation vapour pressures (s.v.p) are measured. The saturation vapour pressure Pθ is given by P  P01   2 , where P0 is the s.v.p at the ice point,

31. ## physics

The density of a gas of relative molecular mass 28 at a certain temperature is 0.90 kgm-3. The root mean square speed of the gas molecules at that temperature is 602 ms-1. Assuming2 that the rate of diffusion of a gas is inversely proportional to the

32. ## Math

Everything on set

33. ## mathematics

Find x, y, and z such that x³+y³+z³=k, for each k from 1 to 100.

34. ## Maths

Olivia has a deck of well-shuffled playing cards. What are the odds: a) in favour of drawing a red face card? b) against drawing a black card?

35. ## Physics

A man of mass 50kg ascends a flight of stairs 5m high in 5seconds. If acceleration due to gravity is 10ms -2, the power of the man is?

36. ## History

In which world regions or countries was the Seven Years’ War fought? a.)Australia, South America, China b.)North America, Western Europe, India c.)North Africa, Mexico, Japan d.)Scandinavia, Middle East, Afghanistan I think it is B

37. ## Applied Maths

The probability of getting an ‘A’ in English class test is 72%. a. What are the odds of getting an A? ( 2 marks) b. What is the probability, as a decimal to the nearest hundredth, of getting an A in three consecutive tests?

38. ## physics

Why is an object immersed in a liquid lighter than the same object in the air.

39. ## Geometry

ray hf is an angle bisector of

40. ## chemistry

Charles law If the relationship between temperature and volume of a gas at a constant pressure is linear, explain why the volume of a gas doesn’t double when its temperature doubles from 10.0°C to 20.0°C.

41. ## physics

A woman is unhappy with the rate at which eggs cook in a saucepan of boiling water. State in 2 words only, the method she could use to get the eggs to cook fastest.

42. ## physics

Write a mathematical statement for the change in entropy, ds, for the case where no work is done irrespective of the path.

43. ## physics

Under what condition (if any) does a moving body experience no energy even though there is a net force acting on it?

44. ## Chemistry

Vitamin c,which may or may not be affective in preventing cold,is an organic compound containing carbon,hydrogen and oxygen.analysis of a carefully purified sample give c=40.9%,h=4.58%,o=5.45%.from another experiement to be 180.from these

45. ## Applied Maths

A man at a fair plays a game with shells in which he uses 4 shells, one of which has a prize under it. What are the odds against winning the prize?

46. ## maths

The 10th term of an arithmetic sequence is 42 more than the 7th term.If the 1st term is -14,find the second term of the sequence

47. ## Applied Maths

A survey was conducted at a fast food outlet. It was determined that the probability of a customer ordering a food item was 43 % and the probability of ordering a beverage was 64%. There is a 35% probability of a customer ordering a beverage and a food

48. ## Calculus

A box weighing 415 N is hanging from two chains attached to an overhead bean at angles of 56 degrees and 49 degree. Find the magnitude of the tension in each chain algebraically.

49. ## mathematics

Translate this word problem into numerical expressions: If a certain number is doubled and 7 subtracted, the result is 23.