# memo

Most popular questions and responses by memo
1. ## calculus

A searchlight rotates at a rate of 3 revolutions per minute. The beam hits a wall located 7 miles away and produces a dot of light that moves horizontally along the wall. How fast (in miles per hour) is this dot moving when the angle \theta between the

2. ## physics

A novice skier, starting from rest, slides down a frictionless 31.0° incline whose vertical height is 123 m. How fast is she going when she reaches the bottom?

3. ## calculus

A man of height 1.5 meters walk away from a 5-meter lamppost at a speed of 1.8 m/s. Find the rate at which his shadow is increasing in length.

4. ## chemistry

A crucible containing potassium chlorate has a mass is 24.426 g. The crucible is heated according to the lab procedure for this week's experiment and is found to weigh 23.202 g. Write an equation for the reaction and, assuming that all the chlorate

5. ## chemistry

You weigh out 1.70 g of sodium carbonate monohydrate, dissolve it in water and react it with 15.00 mL of 2.00 M HCl. Write an equation for the reaction and calculate the expected mass of carbon dioxide that will be produced.

6. ## calculus

A conical tank has height 3 m and radius 2 m at the top. Water flows in at a rate of 1.4 \text{m}^3\text{/min}. How fast is the water level rising when it is 2.6 m?

7. ## calculus

A hot air balloon rising vertically is tracked by an observer located 4 miles from the lift-off point. At a certain moment, the angle between the observer's line-of-sight and the horizontal is \frac{\pi}{3} , and it is changing at a rate of 0.1 rad/min.

8. ## physics

A projectile is shot at a 37 degree angle from the edge of a cliff h = 305 m above ground level with an initial speed of v0 = 125 m/s how much time will it take to hit the ground

9. ## english

help me to ((write a letter to your year group, inviting students to become part of the team)). In the letter you need to tell them 1)for which activity you are sending a team. 2)what kind of experience or special skills are needed. 3)how members of the

10. ## chemistry 20 MC questions

1- The equipment needed to carry out a titration is: A) hot plate, pipet, and filter paper B) heat source, test tube, and filter paper C) heat source, pipet, and burette D) erlenmeyer flask, pipet, and burette 2- A student correctly predicted that 10.0 g

11. ## home economics

what type of economic activity is predominant in the deserts of north Africa and south Asia?

12. ## calculus

Recall that the volume of a sphere of radius r is V(r) =4\, \pi\, r^3 /3. Find L, the linearisation of V(r) at r=50

13. ## english

hey i corrected this i was wondering if what i did was correct and am still stuck on to of them. Each of the following exercises shows the original source, and then a student’s sentence and/or citation about that source. Each sentence and each citation

14. ## algebra

find the quotient of 2x+1/4x^2+8x+5

15. ## english

hey i really need help in this plzzzzz Each of the following exercises shows the original source, and then a student’s sentence and/or citation about that source. Each sentence and each citation has at least one thing wrong with it (most have more than

16. ## math

a particle M oscillators (that is, moves back and forth) in a straight line along the horizontal axis. the position of M is given by: s(t) = 4 + 2 sin(2t) (1) Find the velocity (v) and acceleration (a) functions. (2) Find the initial position, initial

17. ## science

electrical flow (11 letters)

18. ## physics

whats the acceleration of a car traveling 402 meters in 6 seconds

19. ## science

charges go away from, each other (5 letter word) repel

20. ## calculas

Suppose that the box height is h = 2 in. and that it is constructed using 193 \text{in.}^2 of cardboard (i.e., AB = 193). Which values A and B maximize the volume?

21. ## science

two paths for the charges to follow (8 letters) parallel

22. ## science

circuit is closed and electricity flows (8 letter word) complete

23. ## science

where the current takes an unintended path (12 letter word) short circuit

24. ## science

a circuit that is open and electricity does not flow (a 10 letter word) incomplete

25. ## science

what metal is in the form of a form of a thread or rod Many many metals can be in that form. You might try tungsten (also called wolfram) since that metal is so ductile.

26. ## science

what is a 18 leeter word for flow of charges through the circuit electrical currents ?

27. ## science

bddhsbkkhfdjkfnfnfgl gibberish (9 letters)

28. ## science

circuit is open and electricity does not flow (10 letters)

29. ## science

flow of charges through the circuit (18 letters)

30. ## science

a dry cell or power source (7 letter word) battery?

1. ## Chemisty

The radius of a strontium atom is 215 pm. How many strontium atoms would have to be laid side by side to span a distance of 2.56 mm?

posted on February 1, 2016
2. ## Calculus

recall that the voulme of a sphare of radius r is v(r)=(4pir^3)/3. find l, ther linearisation of v(r) at r=50. A sphare of radius 50 centimeters is covered with a layer of point of thickness 0.31 millimeters. use the linearisation of v at r=50 to estimate

posted on March 25, 2014
3. ## chemistry 20 MC questions

Thanks Dr. Bob for #D this is the question given, there is no lab given!

posted on October 22, 2012
4. ## English (MLA format)

i posted this post in the wrong place sorry

posted on September 26, 2011
5. ## English (MLA format)

ooh yeah and for the following do i use the same citation ? Source C: An article in the Chicago Tribune entitled “Happiness is Contagious, New Study Finds.” It was written by Judith Graham and published in the December 4th edition. No page number is

posted on September 26, 2011
6. ## english

Hi; 4-ok so for the first you added the last name and page number 5- you added page number and the last one its basically in this form Pepin, Ronald E., ed. and trans. Scorn for the world: Bernard of Cluny's De contemptu mundi. East Lansing: Colleagues

posted on September 26, 2011
7. ## english

#6- Toussaint-Samat, Maguelonne. The History of Food. Trans. Anthea Bell. newyork: Barnes and Noble ,2003.

posted on September 26, 2011
8. ## english

#5 my corrected one is In her book The History of Food, Maguelonne Toussaint-Samat claims that the orange tree in California didn’t become a staple until the adventurous spirit of the Gold Rush took over in 1848.(655) i cant seem to underline the title

posted on September 26, 2011
9. ## english

Toussaint-Samat,Mageulonne."The History of Food". Newyork:Barnes,2003.Noble Books.

posted on September 26, 2011
10. ## english

number 6 i corrected it as Toussaint-Samat,Mageulonne."The History of Food." Newyork:Barnes,2003.Noble Books. it was Toussaint-Samat, Maguelonne. The History of Food. Trans. Anthea Bell. Barnes and Noble: New York. 2003 there isn't two number 5s the

posted on September 26, 2011
11. ## english

i didn't correct #4 yet how is it correct 4 is confusing

posted on September 26, 2011
12. ## english

but in 5 In her book The History of Food, Maguelonne Toussaint-Samat claims that the orange tree in California didn’t become a staple until the adventurous spirit of the Gold Rush took over in 1848. it should be In her book "The History of Food,"

posted on September 26, 2011
13. ## english

Orange trees were first planted by a Spanish missionary who reached the West in 1707, although they didn’t really take off as a farm crop until 1848 during the Gold Rush (Bell 665). i don't see anything incorrect in it its hard :(

posted on September 25, 2011
14. ## physics

15 m

posted on September 25, 2011