# Questions Asked onApril 14, 2018

1. ## Chemistry

copper(II) nitrate and barium sulfide Express your answer as a complete ionic equation and a net ionic equation.

2. ## Calculus

The base of a triangle is shrinking at a rate of 1 cm/min and the height of the triangle is increasing at a rate of 6 cm/min. Find the rate (in cm2/min) at which the area of the triangle changes when the height is 38 cm and the base is 36 cm. I just want

3. ## Chemistry

Ba(NO3)2(aq) + Na2SO4(aq) → BaSO4(s) + 2NaNO3(aq) An experiment was begun with 75.00 g of Ba(NO3)2 and an excess of Na2SO4. After collecting and drying the product, 64.45 g of BaSO4 was obtained. Calculate the theoretical yield and percentage yield of

4. ## Pre-calc

Radhanath Sikdar, a mathematician and surveyor from India, calculated the height of Mount Qomolangma (Mount Everest) in 1852. While standing a distance of 240 kilometers from the peak, he determined that the height of the mountain was 8839 meters.†

5. ## physics

A solid cylinder of mass m and radius R rolls down a parabolic path PQR from height without slipping (assume R ≪ H) as shown in the figure below. Path PQ is rough (and so the cylinder will roll on that path), whereas path QR is smooth, or frictionless

6. ## math

An Artisan has 63 kg of metal of density 7,000kg/m3. He intends to use make a rectangular pipe with external dimensions 12 cm by 15 cm and internal dimensions 10 cm by 12 cm. Calculate the length of the pipe in meters.

7. ## Calculus

A road running north to south crosses a road going east to west at the point P. Car A is driving north along the first road, and an airplane is flying east above the second road. At a particular time the car is 15 kilometers to the north of P and traveling

8. ## Calculus

Find dy/dt at x = 1 and y = x2 + 3 if dx/dt = 4 I'm not sure how to set up this type of equation. Do you use the pythagorem theorem for this? Then take the derivative, and then plug in?

9. ## Statistics

Suppose flights at a large metropolitan airport are on-time 68% of the time and late 32% of the time. We want to use a table of random digits to simulate flight status (on-time or late), so we'll assign 01, 02, … , 68 to represent on-time flights, and

10. ## Chemistry

How many grams of commercial C2H4O2 (97% pure by mass) must be allowed to react with an excess of PCl3 to produce 75.0g of C2H3OCL if the reaction has a 78.2% yield?

11. ## Maths

Y varies partly as X and partly as the square root of inverse of X. If Y=11 where X=9 and Y=20 where X=9 calculate Y when X=12.

12. ## English

What do you do in the evening? 1. I do house chores from time to time. 2. I do household chores from time to time. 3. I do chores from time to time. 4. I do some chores from time to time. 5. I do housework from time to time. [Are they all grammatical?

13. ## English/writing

Can someone tell me if this sentence is ok? Or give suggestions on how I can make it better? The students not only raised money during the walk-a-thon but continued to collect pledges three weeks afterward.

14. ## History

What conflict resolution does Malala Yousafzai follow? Competition, Collaboration, Compromise, Accommodation, Avoidance _______________________________________________________________________ I am actually not sure. I used the conflict with Malala and

15. ## Pre-calc

The Blue Angels, the Navy's elite flying squadron, have performed for more than 427 million fans since their inception in 1946. Suppose the two Blue Angel jets at points P and A in the diagram have elevations of 1555 feet and 1000 feet, respectively. Both

16. ## Java

The way event driven programming works in Java is that a handler object fires an event, and a source object processes the event. True or False

17. ## math

Shopping centers X, Y and Z are such that Y is 12 km south of X and Z is 15 km from X. Z is on a bearing of 330° from Y.

18. ## math

Find the reciprocal of 0.342. Hence evaluate:(√0.0625/0.342)

19. ## Math

The front door of a house is 80 inches tall. What is the volume of the door? Top is 2 in. the length is 36 in. What is the volume of the door? A bedroom door in the house has the same dimensions as the front door, but the length is 30 inches rather than 36

20. ## Math..mathematical induction

Prove by mathematical induction that 1+3+5+7+....+(2n-1)=n²

21. ## Math

A 6 ft tall person walks away from a 10 ft lamppost at a constant rate of 5 ft/s. What is the rate (in ft/s) that the tip of the shadow moves away from the pole when the person is 10 ft away from the pole? I have drawn out the picture, but I am not sure

22. ## AP Chemistry

What is the reaction that would occur in a galvanic cell between solutions of Al3+ and Pb2, where would oxidation and reduction take place, and what would the cell potentials be?

23. ## math

Find the lengths of each side give the following right triangle: Base=x hypotenuse=x+6 last side=x+3 thank you!

24. ## English

What does rhetoric have to do with democracy? How did the influence of rhetoric spread throughout the world?

25. ## Chemistry

What is the correct answer for balancing 3NO2+ H20 --> HNO3+2NO ? I have worked through this and got 6NO+H20 -->H3NO3+2NO is the correct answer?

26. ## English

1. He has cereal and milk for breakfast. 2. He has cereal with milk for breakfast. [Which one do we have to use? Are both okay? When we pour milk into a bowl of cereal, which expression do we use?] 3. I have rice, kimchi, some vegetable side dishes for

27. ## English

1. I put on a gym uniform for PE classes. 2. I put on a jogging suit for PE classes. 3. I put on a uniform for PE classes. 4. I wear a sports uniform for PE classes. 5. I wear sports clothes for PE classes. ================================ What is a common

28. ## English

1. I don't like chocolate. 2. I don't like chocolates. [Can we use both singular and plural forms; chocolate and chocolates? What is the difference between them?]

29. ## math

hypothesis testing , this is the example, The company has enjoyed success, and has grown to the current staff of 26 people. There is a perception/rumor in the company that the average pay rate for males is different than the average pay rate for females.

30. ## Maths .. Binomial theorem

Use the binomial theorem to expand (2-1/4X)⁴

31. ## Antennas

The GSM-900 (900MHz band) link budget allows a maximum isotropic path loss of 143 dB (the antenna gains are not included). Which is the corresponding maximum cell radius for undistributed free space propagation?

32. ## Finance Math

Oprah Winfrey has closed on a 42-acre estate near Santa Barbara, California, for \$50,000,000. If Oprah puts 20% down and finances at 7% for 30 years, what would her monthly payment be?

33. ## Social Studies

why might Myanmar have difficulty attracting foreign investments? I studied my book but I understand nothing of it.

34. ## Calculus

A 18 ft ladder is leaning against a wall. If the top of the ladder slides down the wall at a rate of 3 ft/s, how fast (in ft/s) is the bottom moving along the ground when the bottom of the ladder is 9 ft from the wall? Also, this one. I have done the

35. ## math

An isosceles trapezoid ABCD has bases AD = 17 cm, BC = 5cm, and leg AB = 10cm. A line is drawn through vertex B so that it bisects diagonal AC and intersects AD at point M. Find the area of ΔBDM.

36. ## math

What ordered pair of positive integers (r, s) satisfies the equation 5r + 6s = 47, such that r > s? What is the integer for r ? What is the integer for s?

37. ## English

Can someone give my examples of famous speeches with repetition in them? for example? "I have a dream" by Martin Luther King. Thanks! ~

38. ## Math

The Position of two A and B on the earth’s surface are (36°N, 49°E) and (36°N, 131°W ) respectively. (a) The difference in long between town A and town B (2 marks) (b)) Given that the radius of the earth is 6370, calculate the distance town A and

39. ## math

The angle which the tangent to the curve at the point (2, 5) makes with the horizontal

40. ## Calculus

The position vector of an object that is moving in the xy-plane is (t+cost, t^3-75t) for t on [0, 2pi]. At which value of y does the object's path have a horizontal tangent? I think this is the value at which dy/dt=0, or at t=5. At t=5, y= -250.

41. ## Physics

A construction company uses a crane to lift a wrecking ball2000kg the crane can cause the wrecking ball to speed up from rest to 0.1m/s in 0.2 second what is the acceleration of the wrecking ball during this time

42. ## Calculus

An object moves in the xy-plane so that its velocity vector for 0

43. ## physics

A 10 cm long, 2cm wide wooden wedge is pushed into a soft wood block.calculate: a) the velocity ratio of the wedge b) the load on the soft wood if the effort applied is 30N

44. ## math

Manyatta Village is 74 km North West of Nyangata Village. Chamwe village is 42 km west of Nyangata. By using an appropriate scale drawing, find the bearing of Chamwe from Manyatta.

45. ## math 11

A pilot of a downed airplane fires the emergency flare into the sky. The path of the flare is modelled by the equation h=-0.096(d-25)^2 +60 where h is the height of the flare in meters when its horizontal distance from where it was propelled is d meters.

46. ## Physics

A hiker in a canyon calls out “Hello” and hears his echo 2 s later. How far away are the canyon walls?

47. ## Physics

If two sound waves undergo complete destructive interference, what must be true? A. They have the same amplitude. B. They have the same frequency. C. They are 180° out of phase. D. all of the above

48. ## Calculus

Find the terminal point given the vector and an initial point of (-6,10).