Saturday
August 23, 2014

Posts by Nikita


Total # Posts: 117

science
I need help finding a PowerPoint with the importance of installation of actuator blocks on CH-47F aircraft or MH47 aircraft please.
February 13, 2014

EARTH SCIENCE
You guys should really do your own work cause how do we know what these people are saying is true not trying to be a rab
January 7, 2014

Psy/355
I need help with my research paper please. 700- to 1,050-word paper in which you examine the concept of motivation. „h Address the following items: o Define motivation. o Identify at least two sources of motivation. o Explain the relationship between motivation and ...
November 20, 2013

Psychology
I need help on collecting information for my research paper. Thanks in advance. Prepare a 1,400- to 1,750-word paper in which you explain the interaction between hormones and behavior, and how these interactions affect the determination of gender identity. Address the ...
November 10, 2013

math
by what percent os a 100- watt light bulb brighter than a 60 watt light bulb
May 18, 2013

English
I think is B
May 5, 2013

English
In these four sentences, the word that’s most obviously a loaded word is? 1. Netta and Jim argued over their views of free trade. 2. Netta and Jim had different views on free trade. 3. Netta and Jim were sharply split over the issue of free trade. 4. Netta and Jim refused...
May 5, 2013

English
adrift like a paper boat
May 4, 2013

English
Why u disagree....8line line a paper boat.
May 4, 2013

English
This question is based on the following excerpt from a short story. Inside the bus, in his summer Class-A uniform with its brass glitter and infantry-blue shoulder cordon, Jamie Sabin was going home. Fort Benning would be a fading dream; Preston, Virginia, a place unknown, his...
May 4, 2013

English
This question is based on the following excerpt from a short story. Inside the bus, in his summer Class-A uniform with its brass glitter and infantry-blue shoulder cordon, Jamie Sabin was going home. Fort Benning would be a fading dream; Preston, Virginia, a place unknown, his...
May 4, 2013

English
This question is based on the following poem: Seasons are celebrations. A year's a Ferris wheel. Both honor our world's habit of spinning 'round a star. 7. Which one of the following sentences best expresses the main idea of this poem? A. The world has a habit of ...
May 4, 2013

English
This question is based on the following poem: Seasons are celebrations. A year's a Ferris wheel. Both honor our world's habit of spinning 'round a star. 7. Which one of the following sentences best expresses the main idea of this poem? A. The world has a habit of ...
March 26, 2013

calculus
Construct a sign chart for the derivative. Then determine the relative and absolute extrema for y = -4x2 + 4 on the interval [-3,3].
February 27, 2013

spanish
Weather report in Spanish. Help!!!
October 29, 2012

english
i want the inanimate poem "the wind"
June 24, 2012

AP CHEMISTRY
I don't understand how to do the first one. I really don't know how to do reactions
February 15, 2012

AP CHEMISTRY
Phosphoric acid is triprotic acid (three ionizable hydrogens). The values of its stepwise ionization constants are Ka1= 7.5E-5, Ka2= 6.2E-8, and Ka3= 4.2E-13 1) Write the chemical equation for the first ionization reaction of phosphoric acid with water 2)Write the equilibrium ...
February 15, 2012

Human and Social Biology
A calorimeter was used to oxidise completely 2g of a food sample,causing a temperature rise of 5degrees C in 100cm3 of water(this figure includes the water equivalent of the apparatus). How much energy was present in the food sample(in joule per g)?
January 8, 2012

ECE405
Identify and describe at least two ways you can structure and design the classroom environment to enhance anti-bias education and culturally relevant learning
January 5, 2012

chemistry
What is the minimum volume of 2.6 required to completely dissolve 20.0 of potassium metal?
November 26, 2011

economics
What two kinds of changes in the capital stock can improve labor productivity? How can each type be illustrated with a per-worker production function? What determines the slope of the per-worker production function?

14-) (Rules of the Game) How do “...
October 18, 2011

physics
An airplane travels 2800 km at a speed of 700 km/h, decreases its speed to 500 km/h for the next 1500 km and travels the last 1000 km at a speed of 400 km/hr. Find the average speed of the plane for the trip.
September 13, 2011

math
78
May 16, 2011

Chemistry
In the reaction between H2O2 and I-, 15 mL of 0.30M KI, 65. mL of 0.10M H2O2 and 19 mL of 0.020M Na2S2O3 were mixed in a flask containing starch and buffer and the total volume was made up to 500mL with distilled water. The solution turned blue (indicating the presence of I2...
March 22, 2011

Chemistry
In this exercise, you need to spike 0.5 L of river water with 1,000 g/L of phosphate. Starting from a stock solution containing 1,000 mg/L of phosphate, calculate and explain in detail how exactly you will conduct this spiking experiment
March 22, 2011

science
a sliver coin and a gold coin each have a mass of exactly 6.6 grams the specific heat of sliver is 0.235j/g.degrees celcius and the specific heat of gold his 0.130j/g. degrees celcius what coin requires more heat to raise its tempreature by 40 degrees celcius
March 1, 2011

science
a plastic container witha mass of 30 grams gains 1,140 joules of heat if the tempreature of the container increases 20 degrees celcius what is the specific heat of the plastic in the container
March 1, 2011

science
gold has a specific heat of 0.130j/g. degrees celcuis if 195 joules of heat are added to 15 grans of gold homw much does the tempreature of the gold change
March 1, 2011

science
tori wants to increase the tempreature of 500 grams of water from 20 degrees celcius to 100 degrees celecius if the specific heat of water is 4.18j/g. degrees celcius how much heat is needed ?
March 1, 2011

science
the specific heat of sliver is 0.235j /g.c. how much heat is neeeded to raise the tempreature of an 8 gram sliver ring be 50 degrees celecius
March 1, 2011

Chemistry
Calculate the final temperature of a mixture of 350g of ice cubes at -18 degrees C and 237 g of water at 100 degrees C
January 25, 2011

Chemistry
Assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at -14.5 degrees celcius ? The freezing point for pure water is 0.0 degrees celcius and Kf is equal to 1.86 degrees celcius/m. If the 3.90 m...
January 16, 2011

PHYSICS
Leg traction is applied to a patient's leg as shown in the figure below. If the physician has requested a 33 N force to be applied to the leg, and the angle is θ = 60 degrees. what mass m must be used for the object hanging from the massless cable? Image of traction: ...
October 14, 2010

ap chemistry
girlll u needa stop stressin! jus chill erythang gon b okay.
June 14, 2010

math
2,4,8,16,32,64 64 is the 6th number
April 15, 2010

12th grade.physics
three equal and similar charges each of 'q' units are placed at the corners of the square of side 'a' .find the electric field strength at the fourth corner?
April 10, 2010

College chemistry
A buffered solution is made by adding 50.0 g NH4Cl to 1.00 L of a 0.70 M solution of NH3. Calculate the pH of the final solution. (Assume no volume change.)
March 10, 2010

Physics
An object is attached to a horizontal spring. It is initially displaced by distance Δx from the equilibrium position and then released from rest. When the object passes the equilibrium position, its speed will be: a)v = 0 m/s b)v proportional to Δx (the speed is ...
December 2, 2009

Physics
Bernoulli's equation is an expression of: the conservation of mass the conservation of total energy the conservation of kinetic energy the conservation of momentum the conservation of velocity My ans: the equation states that it should be a constant when there is a ...
December 2, 2009

Physics
Use the following two viscosity values for liquid water: η = 1.8 x 10-3 Ns/m2 at 0 o C η = 2.8 x 10-4 Ns/m2 at 100 o C At what temperature do you need a lesser force to pull a given glass slide with a given speed v though the water?
December 2, 2009

Physics
If I double the density of a fluid, the buoyant force on a given piece of material fully immersed in the fluid will?
November 25, 2009

Physics
The zeppelin Hindenburg exploded on May 6, 1937, in Lakehurst, New Jersey. The accident was due to this type of dirigible using hydrogen (density of H2, M = 2g/mol) as a gas. It carried up to 70 passengers and crew. Estimate how many passengers and crew the Hindenburg could ...
November 24, 2009

Physics
wow I still don't understand how to do this problem. Are there any equations i need to use?
November 22, 2009

Physics
The zeppelin Hindenburg exploded on May 6, 1937, in Lakehurst, New Jersey. The accident was due to this type of dirigible using hydrogen (density of H2, M = 2g/mol) as a gas. It carried up to 70 passengers and crew. Estimate how many passengers and crew the Hindenburg could ...
November 22, 2009

Physics
so its d right
November 21, 2009

Physics
We study water of 1.0 g/cm3 density in an open container with its surface exposed to the atmosphere. If we measure the pressure first at a depth d and find the value p1, and then at twice that depth to find p2, the two results are related in this form: a) p1> p2 b) p1=p2 c...
November 21, 2009

Physics
A 0.535 kg wood block is firmly attached to a very light horizontal spring (k = 175 N/m. It is noted that the block-spring system, when compressed 5.0 cm and released, stretches out 2.3 cm beyond the equilibrium position before stopping and turning back. What is the ...
November 18, 2009

Physics
Ok the above diagram didnt turn out the way i expected it to. But I hope you can still understand with the description. Please help, I tried it two times but I am not getting the correct answer.
November 17, 2009

Physics
A massless string runs around two massless, frictionless pulleys, where one pulley is attached to the ceiling, and the other is suspended with a mass m. An object with mass m = 17 kg hangs from one pulley. A force F is exerted on the free end of the string to lift the object ...
November 17, 2009

Physics
An object of mass m = 2.7 kg moves with initial speed vinitial = 2.2 m/s, then interacts with its environment, releasing 4.4 J of work. What is the speed of the object after the interaction is completed? My ans: I found KE initially and then subtracted 4.4J and with the new ...
November 17, 2009

Physics
Ok I got -W Because I used g=-9.8m/s^2 because it is acting in the opposite direction relative to the vertical y-axis. Is this correct? What does -W mean though?
November 17, 2009

Physics
Determine the work done by a person when lowering an object of mass 2.6 kg by a distance of 2.4 m. The person applies a force Fext such that the object moves with constant speed, i.e., without acceleration? My ans: W=F*d F = ma But it's saying constant speed so a=0 However...
November 17, 2009

Physics
W = F * d and F = ma but a = 0 so i was confused
November 17, 2009

Physics
Determine the work done by a person when lowering an object of mass 2.6 kg by a distance of 2.4 m. The person applies a force Fext such that the object moves with constant speed, i.e., without acceleration,
November 17, 2009

Physics
An object of mass 0.7 kg is thrown vertically upwards at a speed of 23 m/s. What is the gravitational potential energy of the object at the highest point of its trajectory?
November 17, 2009

Physics
In a mechanical experiment with an isolated object, only Ekin and Epot of the object change. If the object accelerates from 5 m/s to 10 m/s, its potential energy has? My ans: Potential energy has decreased by a factor of 2 because kinetic energy has increased by a factor of 2?
November 17, 2009

Calculus
Find a) lim (ln x)^1/x x->infinity b) lim (x-1)^lnx x->1+
November 11, 2009

Calculus
What is lim (t^3 + 1)/(t lnt) x->infinity
November 11, 2009

Calculus
Using L'Hopital's rule find the limit if exists of; lim x->1 (cosx)/(pi-2x) I got (sinx)/2 but i am not sure about this> Can anyone help me out
November 11, 2009

Physics
Which of the following forces does NOT have a zero work done on the object: a)The normal force on a box that slides across a horizontal level floor. b)The weight on a box that slides across a horizontal level floor. c)The normal force on a box that slides down an inclined ...
November 10, 2009

Physics
A force of 5 N causes the displacement of an object by 3 m in the direction in which the force acts. What work did the object do/has been done on the object? My ans: Work = F * Displacement =+15 J positive because it acts in the direction of the object?
November 10, 2009

Calculus
What is implicit differentiation...as in what would be the steps in solving it. I read my textbook but it seems very confusing. 1) Differentiate both sides with respect to x 2) Realize that y is a function of x 3) Solve for y Plus the d/dx notation made it even more confusing...
November 4, 2009

Physics
Calculate the acceleration due to the rotation of the Earth of a person in a location 26° northern geographical latitude. Use REarth = 3,686 km for the value of the radius of the Earth.
November 3, 2009

Physics
In a physics experiment with an inclined air track, what do you predict about the following: a) Position graph b) Velocity c) Acceleration My ans: For a i predicted there would be a curve and i didn't know why b) velocity will decrease with time but why? c) acceleration is...
October 27, 2009

Physics
So in an experiment with an inclined air track (with air blower - like ramp of air hockey) and glider, why does the velocity decrease with time? I know that acceleration remains constant because og gravity, but why does velocity decrease? shouldn't it increase? What would ...
October 27, 2009

Physics
A roller coaster ride includes a circular loop with radius R = 13.3 m. What minimum speed must the car have at the top to stay in contact with the tracks?
October 26, 2009

Physics
A satellite orbits at an average altitude of h = 409 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 10^24 kg
October 26, 2009

Physics
How long would it take for the Earth to complete a full turn if a person at 49.2° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,385 km for the radius of Earth.
October 26, 2009

Physics
How long would it take for the Earth to complete a full turn if a person at 49.2° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,385 km for the radius of Earth
October 26, 2009

Physics
A roller coaster ride includes a circular loop with radius R = 11.6 m. What minimum speed must the car have at the top to stay in contact with the tracks? How would I go around solving this, as in what formula would I need?
October 26, 2009

Calculus
How do you find factors of this with long division? 2x^3 - 3x^2 + 3x -1 = 0 I just don't know how to do it because there is a coefficient in front of first term.
October 26, 2009

Calculus
find the derivative of f, when f(x)=1/sqrt(x) ok so i tried simplifying it by multiplying top and bottom by conjugate radical, the top simplified to h but the bottom was a mess.
October 25, 2009

Calculus
We aren't allowed graphing calculators, plus it a rational function
October 25, 2009

Calculus
Ok so I have to find a vertical asymptote with denominator 3x^3-x-1. So then the denominator must not equal zero. But i just can't solve the cubic function i tried long division! but it didnt work
October 25, 2009

Calculus
Is f(x)=1/sqrt(x-5) continious at x=2? I know it is discontinuous at x=5 but then I got confused with the three rules. Because function is continuous if f(a) a is in the domain, limit exits, and also lim x->a f(x) = f(a)?
October 25, 2009

Physics
An object of mass M rests on a horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m. There is static friction between the horizontal surface and mass M. The coefficient of static friction is 0.75 and M=15. ...
October 22, 2009

Physics
A bicycle and rider of total weight 815 N travel at a speed of 40.0 km/h. The rider hits the breaks and the bicycle slides to a full stop in a distance of 8.5 m. Ignore air resistance and use g=9.8 m/s2. What is the coefficient of kinetic friction between the tires (rubber) ...
October 22, 2009

Physics
So I am guessing kinetic friction forces is the same as friction problem before, so the answer would be greater than zero and less than 90 N?
October 22, 2009

Physics
I haven't gotten to the chapter on friction yet, so I am totally clueless...I am still on kinematics and biomechanics right now.
October 22, 2009

Physics
An object slides down a inclined surface in the presence of kinetic friction forces. At the given inclination the kinetic friction force is found to be of magnitude 90 N. Now, the angle that the surface makes with respect to the horizontal is increased and the object continues...
October 22, 2009

Physics
costheta decreases so the answer is B? right
October 22, 2009

Physics
but isn't costheta periodic?
October 22, 2009

Physics
An object rests on an inclined surface thanks to the presence of static friction forces between the object and the surface. The magnitude of the friction force that prevents the object from sliding is found to be 30 N. Now, the angle that the surface makes with respect to the ...
October 22, 2009

Challenging a Grade?
I think you are on the wrong website
October 22, 2009

Physics
An object rests on an inclined surface thanks to the presence of static friction forces between the object and the surface. The magnitude of the friction force that prevents the object from sliding is found to be 30 N. Now, the angle that the surface makes with respect to the...
October 22, 2009

Physics
To treat fractures of the humerus shaft, a cast and traction device is used; such that the cast of the upper arm is bent by 100 degrees to 110 degrees at the elbow joint. The traction device is an object of mass M that is hung at the elbow, it keeps the upper arm under tension...
October 19, 2009

Physics
Hairs on the arms are tilted upward when a person gets goose bumps. The contracting muscle is called arrector pili and connects to the epidermis and the root sheath. Can you identify an action-reaction pair of forces that is involved in its action? My ans: I think the ...
October 19, 2009

Physics
Two forces F1 and F2 act on ab object. It accelerates in a particular direction. Under what circumstances can you predict the direction of force F1 regardless of the specific value of Force F2? My ans: When F2 is weight but I am not sure
October 19, 2009

Physics
a) Why do athletes in jumping or throwing disciplines use an approaching run as part of their acceleration? b) Neglecting air resistance and aerodynamics, what would be the best angle of release in discus throwing? My ans: a) To increase horizontal velocity? Since acceleration...
October 18, 2009

Physics
Thanks andre
October 18, 2009

Physics
An object is thrown upward by a person on a train that moves with constant velocity. a) Describe the path of the object as seen by the person throwing it b) Describe the path of the object as seen by a stationary observer outside the train?
October 18, 2009

Physics
Is there any point along the path of a projectile where its velocity and acceleration vectors are; a) perpendicular to each other b) parallel to each other? My ans: a) I thought its perpendicular at the peak but I didnt know how to explain it b) I thought they would be ...
October 18, 2009

Physics
An object is thrown upward by a person on a train that moves with constant velocity. a) Describe the path of the object as seen by the person throwing it b) Describe the path of the object as seen by a stationary observer outside the train?
October 18, 2009

Physics
An object is thrown vertically upward. a) What are its velocity and acceleration when it reaches its highest altitude? b) What is its acceleration on its way downward half a meter above the ground? My ans: a) velocity is zero and acceleration is 9.8 m/s^2 b) i am not sure but ...
October 18, 2009

Physics
An object is thrown upward by a person on a train that moves with constant velocity. a) Describe the path of the object as seen by the person throwing it b) Describe the path of the object as seen by a stationary observer outside the train?
October 17, 2009

Physics =(
a) Can an object accelerate if its SPEED is constant? b) Can ab object accelerate if its VELOCITY is constant?
October 17, 2009

Physics
An object is thrown vertically upward. a) What are its velocity and acceleration when it reaches its highest altitude? b) What is its acceleration on its way downward half a meter above the ground? My ans: a) velocity is zero and acceleration is 9.8 m/s^2 b) i am not sure but ...
October 17, 2009

science
About 24% of the ordinary matter in the universe is thought to be helium produced in the Big Bang. Big bang theory supports this number...one of its major triumphs.
October 17, 2009

Physics
Can the instantaneous velocity of an object at a given time instant be greater than the average velocity over a time interval that includes the given time instant? Can it be less?
October 17, 2009

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