# Lissa

Most popular questions and responses by Lissa
1. ## physics

Four identical masses of 2.7 kg each are located at the corners of a square with 1.4 m sides. What is the net force on any one of the masses? F=((G)(m1)(m2))/r^2 I don't understand why im not getting it right... i need help please!!

2. ## satistics

Among a random sample of 500 college students, the mean number of hours worked per week at non-college related jobs is 14.6. This mean lies 0.4 standard deviations below the mean of the sampling distribution. If a second sample of 500 students is selected,

3. ## Statistics

A college’s data about the incoming freshmen indicates that the mean of their high school GPAs was 3.4, with a standard deviation of 0.35; the distribution was roughly mound-shaped and only slightly skewed. The students are randomly assigned to freshman

4. ## physics

A 70 kg man weighs 686 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 14% of his body weight? i don't even know where to start with this question... i need help!

5. ## L.O

What is meant by 'Designated subjects'

6. ## physics

Two masses are suspended from a pulley as shown in the figure below (the Atwood machine). The pulley itself has a mass of 0.20 kg, a radius of 0.15 m, and a constant torque of 0.35 m·N due to the friction between the rotating pulley and its axle. What is

7. ## physics help pleeeeease!!

A monatomic ideal gas is compressed adiabatically from a pressure of 1.09 105 Pa and volume of 250 L to a volume of 39.0 L. (a) What is the new pressure of the gas? (b) How much work is done on the gas?

8. ## Chemistry

I am having great difficulty with the following questions. Any and all help will be greatly appreciated. I have read the chapter and even looked up online tutorials. I still do not understand it. 2 NO (G) + O2 (G) > 2 NO2 (G) Write the equilibrium constant

9. ## Algerbra

The difference between two numbers is 77. Five times the smaller is equal to 7 more than the larger. What are the numbers?

10. ## Satistics

Jody checked the temperature 12 times on Monday, and the last digit of the temperature was odd six times more than it was even. On Tuesday, she checked it 18 times and the last digit was odd eight times more than it was even. Determine which series is

11. ## Chemistry

My head is spinning from this chapter! I've done most of the questions by myself but I have no idea what formulas I should use for these last two. Can you walk me through them so I can understand what I need to do? 1. What volume of 5.0 M HNO3 is required

12. ## physics

A mass m1 = 18.7 kg on a frictionless ramp is attached to a light string. The string passes over a frictionless pulley and is attached to a hanging mass m2. The ramp is at an angle of θ = 23.7° above the horizontal. m1 moves up the ramp uniformly (at

13. ## Pre-cal

A ball is thrown vertically upward with an initial velocity of 96 feet per second. The distance s (in feet) of the ball from the ground after t seconds is s(t)=96t-16t^2 projectile formula: s(t)=1/2gt^2+v+t+h g=acceleration due to gravity. V= the initial

14. ## physics

A monkey is sitting on a wood plate attached to a rope whose other end is passed over a tree branch, as shown in the figure. The monkey holds the rope and tries to pull it down. The combined mass of the monkey and the wood plate is 117 kg. a) What is the

15. ## physics

A crate of oranges slides down an inclined plane without friction. If it is released from rest and reaches a speed of 4.883 m/s after sliding a distance of 2.01 m, what is the angle of inclination of the plane with respect to the horizontal? Please note:

16. ## chemistry

In 1774 Joseph Priestly conducted one of his most famous experiments which lead to a method for the preparation of oxygen. The experiment involved heating a sample of mercury II oxide with a large lens. The equation for this reaction is shown below:

17. ## Geometry

find the measure of each angle of an isosceles trapezoid if two of the angles has measures in the ratio of 2:3.

18. ## physics help pleease!!

A rope goes over a circular pulley with a radius of 6.3 cm. If the pulley makes four revolutions without the rope slipping, what length of rope passes over the pulley? how can i find distance if the only variable given is radius and revolutions?

19. ## physics

A sky diver of mass 80.9 kg (including outfit and equipment) floats down suspended from her parachute, having reached terminal speed. The drag coefficient is 0.575, and the area of her parachute is 20.27 m2. The density of air is 1.14 kg/m3. What is the

20. ## physics

is the following statements true or false + write a correct version of each false sentance below: 1. usually, the cooler a liquid or gas is, the denser it is. 2. if you only want a small volume of hot water, you should place the immersion heater near the

21. ## Algebra

Factor the polynomial completely x^3+27

22. ## Math

LCD 1.1/2 4/x^2

23. ## Analyzing Financial Statements

EAT AT MY RESTAURANT-CASH FLOW With this case, we review the cash flow of several restaurant companies. The restaurant companies reviewed and the year-end dates are as follows: 1. Yum Brands, Inc. (December 30, 2008; December 30, 2007) "Through the five

24. ## physics

A block of mass m1 = 21.3 kg is at rest on a plane inclined by θ = 30.00 degrees. It is connected via a rope and pulley system to another mass m2 = 24.5 kg, as shown. The coefficients of static and kinetic friction between block 1 and the inclined plane

25. ## maths

how do you simplify surds?

26. ## physics

what is the temperature of a bunsen burner?

27. ## Accounting

Hawkeye Electric Company engaged in the following transactions during July. Journalize the preceding transactions on the books of Hawkeye Electric Company using the perpetual system of inventory. July 2 – Purchased inventory for cash, \$800 July 5 –

28. ## Phsyics

A 75 kg student stands at the top of a 30 m tall building. How much gravitational potential energy does this student possess?

29. ## physics

many vacuum flasks have steel walls instead of glass. how would this effect how gfast some hot coffee cools

30. ## physics

1) A fask has the following features; a plastic stopper glass walls with silver coating on both sides vacuume between walls plasic spacer Which features of the flask reduce energy transfer by: a) radiation b) conduction c) convection 2) Many vacuume flasks

31. ## physics

water is being heated in a large beaker. there is a bunsen under it. if a second bunsen was added bellow the largest beaker, what affect would this have? why? (refer to particle behaviour)

32. ## physics

3 beakers are being heated (small, medium and large). consider the first two. both beakers are filled with water and heated for 10 minutes. after about 3 minutes the water in the small beaker the water in the small beaker is boiling; after 8 minutes the

33. ## biology

find a drug scandal within a sportig event and write some notes about it.

34. ## P.E

i need names of famous females who have a careers in sport and their: age, where they live, how many brothers and sisters they have, profession and what they do in their free time.

35. ## maths

A swimming pool has two identical sides in the shape of a trapezium. All other sides are rectangular. The length of the pool is 12m. The width of the pool is 4m. The depth of the pool is 2.1m at the deep end and 1.1m at the shallow end. Rafa fills the pool

36. ## Geometry

Use parallelogram ABCD to answer the following. Diagonals BD and AC bisect at O. 1.measurement of angle BAD = 3y - 5 find angle BCD 2. AC = 12.8 cm find OC

37. ## physics

The mass of a certain neutron star is 2.0 x 1030 kg and its radius is 6,000 m (6 km). What is the acceleration of gravity at the surface of this condensed, burned out star?

38. ## Science

Electromagnetics in motors are used to cause __________.

39. ## Algebra

Today I did a practice SAT problem. If the function ƒ is defined by ƒ(x) = 2x + 3, and if ƒ(a) = 11, what is the value of a? A. 4 B. 7 C. 11 D. 17 E. 25 This is the correct answer and the explanation Here's Why: If the function ƒ is defined by ƒ(x) =

40. ## math

a dog eats 3/4 of dog food for each meal. if he has 7 2/4lbs of food. how many meals can he feed his dog.

41. ## math

It takes 2/6 of a hour to run one mile. how many miles can you run in 4 hours

42. ## math

Mike and Sandra leave the seashore at the same time. Mike drives northward at a rate of 55mph, while Sandra drives west at 65mph. Find how far apart they are after 3 hours to the nearest mile.

43. ## physics

many vacuum flasks have steel walls instead of glass. how would this effect how fast some hot coffee cools?

44. ## physics

how does a dessert fox's large ears help it keep cool?

45. ## maths

what are all the mathethematical terms you need to include in your answer for a question based on circle theorums?

46. ## tourism

write 4 ways that this decline in the tourist industry could affect the country.

47. ## French

I'm having difficulty with these two sentences. There is something wrong with them and I can't figure out what it is. I'm pretty sure it have to do with pluralization but I don't know what I'm doing wrong. Ils avaient un job. Ils travaillaient dans un

48. ## physics

explain why air moving over an object can increase its rate of cooling.

49. ## physics

what temperature is bose- einstien condensate?

50. ## biology

how reliable are tests for drugs in sport?

51. ## history

who was Naqia queen of Assyria?

52. ## history

what treatments (natrual) would you find at the Asclepion?

53. ## history

what did a diet at the asclepion consist of?

54. ## PHYSICS

what is the equation for bose einstien condensate?

-8a+6(a+7)=1

56. ## italian

how to say 6:00am in italian

1. ## Math

Thank you! I didn't rea;;y understand it, but this helped

posted on June 7, 2017
2. ## Chemistry

Can DrBob222 please explain why it is not a pure sample? Thank you in advance.

posted on November 2, 2015
3. ## Chemistry

Okay, I think I have all but the last two figured out but those last two are defeating me. I just don't know what to plug in where. For instance, for the next to last one, I think that I am supposed to add the [NO2] and the [O2] together and then divide by

posted on September 23, 2014
4. ## Creating a Budget -HSM 220

Just cant think of this or get it together right now my mind is so far off. I just need help.

posted on October 13, 2013
5. ## Social Studies

Which of the following is true of the Industrial Workers of the World (I.W.W.)?

posted on September 16, 2012
6. ## French

These are the instructions: Quand ils étaient à l’université, certains étudiants avaient un job et travaillaient. D’autres ne travaillaient pas. Expliquez cela. And Here are the examples: Frédéric (non) Il n’avait pas de job. Il ne travaillait

posted on June 11, 2012
7. ## science

To find out the pressure in this kind of situation simply follow the equation Pressure = height of the column x Density of the filled liquid So, Here Pressure= 15 cmx 13.6 g/cm^3 = 204 gm/cm^2

posted on October 28, 2011
8. ## math

1 is greater than negative 1.

posted on October 27, 2011
9. ## Geometry

thank you reiny

posted on September 21, 2011
10. ## Math

the fraction is just 15/43 in simplest terms

posted on January 9, 2011
11. ## Math !!!!ASAP!!!!!

you combine all common factors so 3x-53=61. then add 53 to both sides to get 3x=114. then divide both sides by 3 to get x=38 :)

posted on January 5, 2011
12. ## math

you have to divide 6/7 by 1/7. to divide fractions you have to flip the second fraction and then multiply them so: 6/7 times 7/1= 42/7= 6 x=6 :)

posted on January 5, 2011
13. ## physics

could try and explain more in depth? like wat does W stand for? his weight? and i don't really get how your solving it..

posted on December 19, 2010