# Posts by nikita

Total # Posts: 148

**Physics**

Work done by conservative forces change only A)PE of the system B)KE of the system C) ME of the system D)None of these

*December 24, 2016*

**Physics**

A simple pendulum is oscillating with an angular amplitude 60°.If mass of bob is 50 gram the tension in the string at mean position is(g=10m/s2)

*December 24, 2016*

**physics**

A boat of mass 40 kg is at rest.A dog of mass 4 kg moves in the boat with a velocity of 10 m/s.what is the velocity of the boat?

*December 24, 2016*

**maths**

pole A is twice as long as pole B. pole C is 260 cm shorter than pole A. pole C is 1040 cm long, what is the total length of the three poles

*September 27, 2016*

**Phyics**

Force of 18000N is gerenated by the engine of traine having is wages of mass 1000kg each and 2000N is lost against.Calcute accelration $ force impaned on each wages.

*September 26, 2016*

**ENGLISH**

SPPECH ABOUT TRADITIONAL HEALERS SHOULD BE ALLOWED TO PRACTISE AND PRESCRIBE MEDICINE IN HOSPITALS AND CLINICS

*April 20, 2016*

**life orientation**

They affect peoples emotions

*April 18, 2016*

**geometry**

Points $F$, $E$, and $D$ are on the sides $\overline{AB}$, $\overline{AC}$, and $\overline{BC}$, respectively, of right $\triangle ABC$ such that $AFDE$ is a square. If $AB = 12$ and $AC = 8$, then what is $AF$?

*March 13, 2016*

**science**

a solution containing 4.2g KOHand Ca(OH) 2 is neutralized by an acid. it consumes 0.1 equivalent of acid, calculate the percentage composition of the sample

*February 11, 2016*

**Chemistry**

if it was 1.1 then its Nitrogen fam my bad.

*April 14, 2015*

**Math**

I don't understand how to do this problem if someone can please help me to figure it out thank you. A survey about the student government program at a school finds that of 245 students: -218 students like the program -27 students think the program is uncessary If a circle ...

*March 31, 2015*

**Math**

Thank you

*March 31, 2015*

**Math**

Which of the following types of information is NOT suited for display on a scatter plot? A. Relationship between age and number of books read in a year. B. Relationship between height and shoe size. C. Relationship between calories sonsumed and body weight. D. Relationship ...

*March 31, 2015*

**Math**

I redid it is the answer B? Thank you

*March 31, 2015*

**Math**

But the number of girls biking is 3.

*March 31, 2015*

**Math**

What percentage of the students who chose biking were girls? Chart Walking Boys= 3 Girls=6 Biking Boys=5 Girls=3 Skateboarding Boys=2 Girls=1 A. 30% B. 37.5% C. 40% D. none of these Is the answer D? Thank you

*March 31, 2015*

**Math**

Thank you for your help.

*March 31, 2015*

**Math**

Oh Im sorry its 0.15 , My book said to do 30%/20 that why I thought 30% was the answers because it came to 0.015. So is D the answer.

*March 31, 2015*

**Math**

What percentage of the boys chose walking? Chart Walking Boys= 3 Girls=6 Biking Boys=5 Girls=3 Skateboarding Boys=2 Girls=1 A. 30% B. 45% C. 25% D. None of these Is the answer A? Thank you

*March 31, 2015*

**Math**

Thank you Ms. Sue

*March 31, 2015*

**Math**

What percentage of the total students chose skateboarding? Chart Walking Boys= 3 Girls=6 Biking Boys=5 Girls=3 Skateboarding Boys=2 Girls=1 A. 10% B. 20% C. 30% D. None of these Is the answer D? Thank you

*March 31, 2015*

**Math**

Math

*March 4, 2015*

**Math**

When finding the perimeter of the figure on a grid why do you not count the space inside the grid

*January 10, 2015*

**math**

One day,20% of the 950 students at West Junior High were absent. How many students were absent? Is this right? 20/100 950/5 equals 190

*December 19, 2014*

**Math**

1. Benny is setting up fish tanks at the pet store. He has 8 angel fish, 12 tiger barbs , and 24 guppies. If he wants to have the same number of each kind of fish in every tank, what is the greatest number of tanks he can set up?

*September 18, 2014*

**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*

**Trig**

(sinA/cosA)/ sinA = 1/cosA = secA

*March 24, 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*

**maths**

Which set or sets 1/9 belongs to

*February 8, 2013*

**maths**

-3cm*4cm*scm

*November 30, 2012*

**statistics**

c

*November 11, 2012*

**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*

**maths**

tanA secA + tanA + tanA secA – tanA / (secA-1)( secA+1) = 2 tanA secA / sec2A -1 = 2 tanA secA / tan2A = 2 secA/ tanA = 2 cosA/ sinA * cosA = 2 / sinA = 2 cosecA

*August 3, 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 didn't 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*