Lissa
Most popular questions and responses by Lissa
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!!
asked on December 19, 2010 
satistics
Among a random sample of 500 college students, the mean number of hours worked per week at noncollege 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,
asked on September 15, 2015 
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 moundshaped and only slightly skewed. The students are randomly assigned to freshman
asked on January 25, 2013 
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!
asked on December 19, 2010 
L.O
What is meant by 'Designated subjects'
asked on February 23, 2016 
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
asked on January 9, 2011 
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?
asked on February 16, 2011 
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
asked on September 22, 2014 
Algerbra
The difference between two numbers is 77. Five times the smaller is equal to 7 more than the larger. What are the numbers?
asked on October 28, 2015 
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
asked on September 15, 2015 
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
asked on September 26, 2014 
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
asked on March 2, 2012 
Precal
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)=96t16t^2 projectile formula: s(t)=1/2gt^2+v+t+h g=acceleration due to gravity. V= the initial
asked on December 5, 2017 
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
asked on March 2, 2012 
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:
asked on March 2, 2012 
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:
asked on November 2, 2011 
Geometry
find the measure of each angle of an isosceles trapezoid if two of the angles has measures in the ratio of 2:3.
asked on September 21, 2011 
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?
asked on January 5, 2011 
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
asked on March 2, 2012 
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
asked on October 29, 2011 
Algebra
Factor the polynomial completely x^3+27
asked on October 12, 2011 
Math
LCD 1.1/2 4/x^2
asked on June 6, 2017 
Analyzing Financial Statements
EAT AT MY RESTAURANTCASH FLOW With this case, we review the cash flow of several restaurant companies. The restaurant companies reviewed and the yearend dates are as follows: 1. Yum Brands, Inc. (December 30, 2008; December 30, 2007) "Through the five
asked on April 5, 2012 
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
asked on March 2, 2012 
maths
how do you simplify surds?
asked on November 20, 2011 
physics
what is the temperature of a bunsen burner?
asked on November 13, 2011 
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 –
asked on November 23, 2013 
Phsyics
A 75 kg student stands at the top of a 30 m tall building. How much gravitational potential energy does this student possess?
asked on May 24, 2012 
physics
many vacuum flasks have steel walls instead of glass. how would this effect how gfast some hot coffee cools
asked on November 22, 2011 
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
asked on November 17, 2011 
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)
asked on November 8, 2011 
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
asked on November 4, 2011 
biology
find a drug scandal within a sportig event and write some notes about it.
asked on November 1, 2011 
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.
asked on October 30, 2011 
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
asked on October 28, 2011 
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
asked on September 21, 2011 
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?
asked on March 12, 2011 
Science
Electromagnetics in motors are used to cause __________.
asked on May 19, 2010 
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) =
asked on June 26, 2009 
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.
asked on September 14, 2016 
math
It takes 2/6 of a hour to run one mile. how many miles can you run in 4 hours
asked on September 14, 2016 
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.
asked on February 13, 2016 
physics
many vacuum flasks have steel walls instead of glass. how would this effect how fast some hot coffee cools?
asked on November 22, 2011 
physics
how does a dessert fox's large ears help it keep cool?
asked on November 19, 2011 
maths
what are all the mathethematical terms you need to include in your answer for a question based on circle theorums?
asked on October 29, 2011 
tourism
write 4 ways that this decline in the tourist industry could affect the country.
asked on February 14, 2014 
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
asked on June 11, 2012 
physics
explain why air moving over an object can increase its rate of cooling.
asked on November 22, 2011 
physics
what temperature is bose einstien condensate?
asked on November 15, 2011 
biology
how reliable are tests for drugs in sport?
asked on November 1, 2011 
history
who was Naqia queen of Assyria?
asked on October 29, 2011 
history
what treatments (natrual) would you find at the Asclepion?
asked on October 28, 2011 
history
what did a diet at the asclepion consist of?
asked on October 28, 2011 
PHYSICS
what is the equation for bose einstien condensate?
asked on October 27, 2011 
math
8a+6(a+7)=1
asked on November 9, 2008 
italian
how to say 6:00am in italian
asked on April 1, 2008

Math
Thank you! I didn't rea;;y understand it, but this helped
posted on June 7, 2017 
Chemistry
Can DrBob222 please explain why it is not a pure sample? Thank you in advance.
posted on November 2, 2015 
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 
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 
Social Studies
Which of the following is true of the Industrial Workers of the World (I.W.W.)?
posted on September 16, 2012 
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 
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 
math
1 is greater than negative 1.
posted on October 27, 2011 
Geometry
thank you reiny
posted on September 21, 2011 
Math
the fraction is just 15/43 in simplest terms
posted on January 9, 2011 
Math !!!!ASAP!!!!!
you combine all common factors so 3x53=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 
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 
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