Questions Asked on
April 14, 2018

Chemistry
copper(II) nitrate and barium sulfide Express your answer as a complete ionic equation and a net ionic equation.
asked by Leslie 
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
asked by Meghan 
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
asked by Pickles 
Precalc
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.†
asked by Ri 
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
asked by joy 
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.
asked by k 
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
asked by Meghan 
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?
asked by David 
Statistics
Suppose flights at a large metropolitan airport are ontime 68% of the time and late 32% of the time. We want to use a table of random digits to simulate flight status (ontime or late), so we'll assign 01, 02, … , 68 to represent ontime flights, and
asked by Anonymous 
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?
asked by Emmanuel 
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.
asked by Doris 
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?
asked by rfvv 
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 walkathon but continued to collect pledges three weeks afterward.
asked by Julie 
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
asked by Sarah 
Precalc
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
asked by Ri 
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
asked by Alex 
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.
asked by kud 
math
Find the reciprocal of 0.342. Hence evaluate:(√0.0625/0.342)
asked by k 
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
asked by elaine 
Math..mathematical induction
Prove by mathematical induction that 1+3+5+7+....+(2n1)=n²
asked by Wisdom 
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
asked by Lily 
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?
asked by Alex 
math
Find the lengths of each side give the following right triangle: Base=x hypotenuse=x+6 last side=x+3 thank you!
asked by Jonah 
English
What does rhetoric have to do with democracy? How did the influence of rhetoric spread throughout the world?
asked by Anonymous 
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?
asked by Gunner 
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
asked by rfvv 
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
asked by rfvv 
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?]
asked by rfvv 
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.
asked by yan 
Maths .. Binomial theorem
Use the binomial theorem to expand (21/4X)⁴
asked by Wisdom 
Antennas
The GSM900 (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?
asked by Arnau EC 
Finance Math
Oprah Winfrey has closed on a 42acre 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?
asked by Heyhi 
Social Studies
why might Myanmar have difficulty attracting foreign investments? I studied my book but I understand nothing of it.
asked by Evalyn Carver 
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
asked by Meghan 
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.
asked by Diya 
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?
asked by Shiv 
English
Can someone give my examples of famous speeches with repetition in them? for example? "I have a dream" by Martin Luther King. Thanks! ~
asked by Anonymous 
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
asked by k 
math
The angle which the tangent to the curve at the point (2, 5) makes with the horizontal
asked by k 
Calculus
The position vector of an object that is moving in the xyplane is (t+cost, t^375t) 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.
asked by Anonymous 
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
asked by Nada 
Calculus
An object moves in the xyplane so that its velocity vector for 0
asked by Anonymous 
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
asked by Huseen 
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.
asked by k 
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(d25)^2 +60 where h is the height of the flare in meters when its horizontal distance from where it was propelled is d meters.
asked by George 
Physics
A hiker in a canyon calls out “Hello” and hears his echo 2 s later. How far away are the canyon walls?
asked by Faoruk 
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
asked by Faoruk 
Calculus
Find the terminal point given the vector and an initial point of (6,10).
asked by Anonymous 
Physics
In order to stay in phase, do two waves need to have the same frequency? The same amplitude?
asked by Akhmed 
math
The length and breadth of a rectangular paper were measured to be the nearest centimeter and found to be 18 cm and 12 cm respectively. Find the percentage error in its perimeter
asked by kud