# Questions Asked onMay 2, 2020

1. ## physics

A uniform metal rod of length 80cm and mass 3.2kg is supported horizontally by two vertical springs balances C and D.Balance C is 20cm from one end and while balance D is 30cm from the other end.Find the reading on each balance.

2. ## History

Which best defines the “stab in the back” myth? It is the idea that Jews betrayed Germany by orchestrating its defeat in World War I. It is the belief that the Weimar Republic would betray Germany if allowed to remain in power. It is the idea that

3. ## math

10 teams enter a soccer tournament. In the first round teams paired in 5 pairs to play with each other. Assume that now in each match one of the teams marked as "HOME" and the other "AWAY" and first 5 games need to run one after another. How many different

4. ## Physical Science

How much does it cost to operate a 28-W porch light for 24 h if electric energy costs 8¢/ kWh .

5. ## Math

One of the roots of the equation x^2−6x+q=0 is 4.5. Find the other root and the value of the coefficient q.

6. ## Chemistry

Why isn't iron usually recommended in the construction of steam pipes and boilers?

7. ## chemistry

Determine the [OH−] of a solution that is 0.240 M in HCO3− (Ka1=4.3×10−7). Determine the pH of this solution.

8. ## math

Find the number of the permutations with the letters of the word TRIANGLE.

9. ## chemistry

Determine the [OH−] of a solution that is 0.130 M in CO32− (Kb=1.8×10−4). Determine the pH of a solution that is 0.130 M in CO32− Determine the pOH of a solution that is 0.130 M in CO32−.

10. ## Math

One hat and two shirts cost \$21. Two hats and one shirt cost \$18. Sam has exactly enough money to buy one hat and one shirt. How much money does Sam have?

11. ## Statistics

a) Banting is believed to reduce weight when done for a minimum of 10 days. A random sample of 5 ladies were weighed before and after Banting. The data is displayed on a table below. Person Weight before Weight After 85 96 105 78 90 120 Construct a 95% for

12. ## chemistry

Calculate the concentration of all species in a 0.145 M solution of H2CO3 (Ka1 is 4.3×10−7 and Ka2 is 5.6×10−11). Calculate the concentration of H2CO3. Calculate the concentration of HCO−3. Calculate the concentration of CO2−3. Calculate the

13. ## History

How did the Nile River impact ancient Nubia ?

14. ## Math

Solve the following inequalities, if it is known that function g is decreasing on its domain. 1. g(3x^2−2x)≥g(3x−2), Dg=ℝ 2. g(x^3−4x) 3. g(5−x^2)≤g(3x−5), Dg=(−∞,4) 4. g(x^2−3x)≥g(4x−12), Dg=(−∞,0]

15. ## Biology

Why neuroendocrine cells in the duodenum are the ones responsible for secretion, chemical modification and storage, reuptake, and digestion of a protein?

16. ## Science

Why pars distalis is not a good candidate for transplantation?

17. ## Chemistry

When water and kerosene are mixed in the container , which one forms the upper layer?give reasons

18. ## art

The only way for artists to control movement in their works is to position important objects on the left-to-right path along which viewers naturally read text. True False*

19. ## Physics

there are four individual transformer feeder having connected loads of 250 kva, 300 kva, 350 kva, demand factor of these are 80%, 70%, 75% and 90% respectively diversity factor is 1.6 find the total demand of load and size of transformer required to supply

20. ## math

Frank has 10 different shirts, 4 different pants, and 3 different pairs of shoes. How many different outfits can he create?

21. ## social studies

Which of the following are true about railroad expansion in the late 19th century? Choose all that apply. A. It led to new managerial forms and techniques. B. It accelerated the growth of new territories. C. It was financed by the government. D. It grew

22. ## chemistry

Write chemical equations and corresponding equilibrium expressions for each of the two ionization steps of carbonic acid Write chemical equations for first ionization step of carbonic acid write chemical equations for second ionization step of carbonic

23. ## mathematics

Calculate the total surface area of the solid cone or vertical height 24cm and base diameter 14cm use the value 22/7 for pier

24. ## Mathematics

The first term of an AP is -5 and the fifteenth term is double the third term. Find the eleventh term of the progression.

25. ## Social Studies

How are the economies of South America Different. Please answer me :)

26. ## Chemistry

A sample on analysis shows 50% CaO, what will be the % of calcium carbonate in it?

27. ## Chemistry

The equation for a normal calibration curve for the detection of iron(II) is determined experimentally to be 𝐴 = 12.93 𝑀−1 [𝐹𝑒 2+] + 0.0017 Analysis of a sample with unknown concentration gives an absorbance reading of 0.106. What is the

28. ## Physics

If a man stands on the floor and weight 90kg and the area between his legs is 0.0368 m sq . What is the pressure exerted on the floor if he stands with one leg

29. ## Science

To create animals that have characters of both species, some people have bred buffalo and cattle together. this is an example of a. inbreeding b. hybridization c. genetic engineering d. transformation My answer is hybridization?

30. ## Physics

State the reason why a steel sphere resting on a horizontal surface is said to be in neutral equilibrium.

31. ## Physics

Principle of moments.

32. ## Chemistry

Name two ions which cause temporary hardness of water and two ions which cause permanent hardness.

33. ## Math algebra

an electrician cuts a 17 ft piece of wire into two pieces one piece is 11 ft longer than the other how long are the pieces

34. ## Physics

Pendulum clocks tend to use quite large masses.Why?

35. ## math

A ladder of 8 m is leaning against a wall begins to slide. If its upper end slides down the wall at a rate of 0.25 m/sec, at what rate is the angle between the ladder and the ground changing when the foot of the ladder is 5 m from the wall? I would like

36. ## spanish

Do now: A) Completa la oración con las letras que completan la palabra adecuada. 1. Quiero ir al ___________a a ver diferentes tipos de peces. 2. Un famoso p_____ d__ d_____ es Six Flags. 3. Me gusta ver a los monos (monkeys) jugando cuando voy al

37. ## math

Zip code contains 4 digits. How many zip-codes can be created with digits 0−9 if you can use each digit only once and zip code can not start with 0.

38. ## algebra

Which of the quadratic functions has the narrowest graph? a. y=-x^2 b. y=1/3x^2 c. y=3x^2 d. y=1/5x^2

39. ## geometry

How do you find the slant height of a cone with a height of 12.5 cm and a diameter of 7cm?

40. ## math

Find the Surface area and volume of a cone with a height(not slant height) of 12.5cm and a diameter of 7cm. How do I show work for this?

41. ## Math

Let g(t) be the Glucose concentration in blood stream of a person at time t. g(t) = 1/k(R - (R - k*go)e^(-kt/v)) Where go - initial glucose concentration (at t=0), v - volume of blood in Humana body , R - rate at which glucose is introduced into blood

42. ## chemistry

What volume of a 15.0% by mass NaOH solution, which has a density of 1.116 g/mL, should be used to make 4.95 L of an NaOH solution with a pH of 10.4? Express your answer to three significant figures and include the appropriate units.

43. ## Maths:

As in the diagram,let A,B,C,D be the centers of the 4 balls in the bottom layer,and A',B',C',D' be the center of the 4 balls in the upper layer.then A,B,C,D and A',B',C',D' are the 4 vertice of the squares of length 2cm,respectively, now the circumscribed

44. ## chemistry

Amphetamine (C9H13N) is a weak base with a pKb of 4.2. Part A Calculate the pH of a solution containing an amphetamine concentration of 220 mg/L .

45. ## Mathematics

2+2i, -2-2i, -2√3+2√3i forms an equilateral triangle

46. ## physics

A 6volt battery of internal resistance 0.5ohm is connected to three resistors of value, 3ohm, 4ohm, and 5ohm. Calculate the current in each resistor, but the 4 and 5ohm resistors arein parallel.

47. ## Math

How would u write "\$18 per week plus \$2 for each visit to the event" in y=mx+b form?

48. ## Geometry

As in the diagram,let A,B,C,D be the centers of the 4 balls in the bottom layer,and A',B',C',D' be the center of the 4 balls in the upper layer.then A,B,C,D and A',B',C',D' are the 4 vertice of the squares of length 2cm,respectively, now the circumscribed

49. ## Math

Solve the following inequalities, if it is known that function f is increasing on its domain. 1. f(x^3−4x)≥f(3x^2+6x), Df=ℝ 2. f(x^4−x) 3. f(4x−3)≥f(2−x^2), Df=(−8,4) 4. f(x^2−5x−7)≤f(5−6x), Df=[−1,∞)

50. ## math

(c^2 − a^2 − b^2)^2 − 4a^2b^2.

51. ## Math

(1−1/2^2)(1−1/3^2)(1−1/4^2)...(1−1/99^2)(1−1/100^2).

52. ## Math

(2020^2−2018^2)(2020^2−2017^2)...(2020^2−0^2)/(2019^2−2018^2)(2019^2−2017^2)...(2019^2−0^2)

53. ## Math

From a sequence i have the explicit formula i have to make it to exponential function then find ratio and y intercept is this correct 5× 4^x-1 F(×)= 5 (4)^x-1 Ratio = 4 Y-int = 5

54. ## Chemistry

The regression line from a plot of absorbance vs. concentration yields: 𝐴 = 2.31[𝐶] + 0.002. If the absorbance of an unknown is measured to be 0.124, what is the concentration of the analyte [𝐶]?

55. ## Chemistry

If a sample of hexane with benzene had an absorbance of 0.153 at 256 nm in a cuvette with 1.000-cm path length, find the concentration of benzene in molarity.