# Posts by sam

Total # Posts: 5,203

**Science**

oomploompa is correct I promise

**Physics**

i have a question on thin lens equation how do i know when di is positive or negative? also i have an example: A convex lens has a focal length of 60 cm. A candle is placed 50 cm from the lens. What type of image is formed and how far is the image from the lens? (Is my answer ...

**intro to computers**

A user calls the help desk and says she cannot install a Windows application on her Windows 8 computer because she is being denied. What is the most likely reason?

**Physics**

A 50kg mass and a 85kg mass are hung over a frictionless pulley what is the acceleration of the system

**social studies**

Thank you MS. Sue. There were 4 answers with 1 being incorrect and the other 3 checked out correct but I wasn't 100% sure of this one

**social studies**

Was the city of Constantinople named after the greek city Byzantium? Or was it just built on that former site with a new name?

**ELA**

is

**ELA**

Thank you for always helping

**ELA**

would it be true? voice is a noun right ?

**ELA**

That's what I thought. Thank you. In this sentence The Gecko is the only lizard with a true voice. Would the subject be Gecko and verb only ?

**ELA**

In the sentence Some only have two legs and some are legless. What would the subject and verb be ?

**Physics**

Calculate the equilibrium position of a third charge of 6.79 x 10^-9 C that is positioned between an 8 x 10^-9 C charge and a 12 x 10^-9 c charge.

**physics**

Calculate the gravity on a planet using a pendulum that has a period of 2.45 s having a length of 1.25 m.

**English**

What's a good introduction on this topic? Should the Canadian health-care system be privatized?

**math**

That's wrong

**irsc**

Complete the table to determine the balance A for $12,000 invested at rate r for t years, compounded continuously. (Round your answers to the nearest cent.) r = 1.5% find T1-1.2 T10-2.9 T20-8.4 T30-24.3 T40-70.4 T50-203.9

**Math**

In triangle RST, angle S is a right angle and cdc R=13/12. What is Tan T? answers: 13/5, 12/13, 12/5, 5/12

**Algebra 1**

-2x-2y=4 2y=-2x-4 Identify the solution

**physics**

I was able to do part 1 and part 2. I am stuck on Now you perform an X=(0110) measurement on the qubit at time 0. What is the expected value of your measurement? What if you perform the above measurement at time t=4π3 instead? What is the expected value of your measurement?

**physics**

Consider the observable M that corresponds to a measurement in the sign basis where the measurement value is 3 if the outcome is + and −2 if the outcome is −. Write M in the standard basis. If M is the Hamiltonian acting on a qubit which is in the state |ψ(0...

**math**

Valerie plays a game using the spinner shown. During the game she will spin a total of 36 times. Which is the best prediction for the number of times she will get either "lose a turn" or "back 3" on the spinner?

**math**

Which is the best prediction for the number of times the spinner will stop on white?

**math**

The table shows the results of a spinner with four colored sections. Use the table to answer the question. The spinner is spun 50 more times. Which is the best prediction for the number of times the spinner will stop on white?

**math**

Three out of 200 machine parts were found to be defective. About how many parts would be expected to be defective out of 2500 parts?

**math**

Sheila drew single marbles from a bag, recorded the outcome, and replaced the marble. In 50 draws, Sheila drew 20 white marbles and 30 black marbles. What is the experimental probability that the next marble will be black?

**math/probability**

a deck of cards contains 6 blue, 7 yellow cards, three red cards, and 5 green cards. what is the theoretical probability of drawing a blue card replacing it and drawing a yellow card?

**math**

Thank you very much MS. SUE

**math**

is it 380/0.5 =760

**math**

The fastest car on earth a Thrust SSC would win every NASCAR race in America. If it takes 0.5 hours to travel 380 miles, what is its speed?

**grammar**

Have you seen my sister Karla around here today?

**calculus**

Determine whether the given series converges or diverges, and find the sum if it converges. I don't understand, help!! Thnx! 1) 20+5+(5/4)+(5/16)+...

**physics**

The gravitational field strength at 35700km above earth is .225N/kg. what is the tangental velocity of a 100000kg communication satellite? mass of earth = 5.98E24kg and radius of earth = 6.37E6m

**physics**

a 2000kg car approaches a 1000m radius curve. If the amount of friction is 1800 N and it have velocity of 30m/sec will the car be able to make the turn?

**physics**

how fast must a .11kg toy car travel at the top of a loop in toy track not to fall off if the radius of the loop is .15m?

**science**

Why can an array of smaller interferometers have a better angular resolution than one large interferometer?

**Chem**

The mass of a golf ball is 45.9g g . If it leaves the tee with a speed of 70.0m/s m/s , what is its corresponding wavelength?

**Trigonometric Functions**

Given the equation y=3sin(3x-180)-2 state the domain, range, amplitude, period, and phase shift of the cycle.

**Trigonometric Functions**

The average depth of the water in a port on a tidal river is 4m. At low tide, the depth of the water is 2m. One cycle is completed approximately every 12h. a)Find an equation of the depth, d(t)metres, with respect to the average depth, as a function of the time, t hours, after...

**science**

b

**physics**

A climber stands on a ledge on one side of a valley. He claps his hands and hears an echo from the opposite side of the valley 1.6 s later. How wide is the valley?

**trig**

On a typical day at an ocean port, the water has a maximum depth of 18m at 6:00 am. The minimum depth of 9m occurs 6.8 hours later. Write an equation to describe the relationship between the depth and time.

**algebra**

x5−8x4+28x3−56x2+64x−32=0

**Math**

A six sided die is tossed. What is the probability that it shows a prime number if you know the following? a. It shows an even number. b. It shows a number less than 5. c. It does not show a 6. d. It shows 1 or 2/ e. It shows an even number less than 4. f. It shows a number ...

**Physics**

Please explain to me how to do this question!!!!!!! A beam consists of singly ionised neon-20 atoms all travelling at the same speed, 3*10^5 m/s, through a vacuum. As the beam passes through the magnetic field it follows a circular path of radius 0.125m. The force on each of ...

**physics**

The planet Jupiter has a satellite, Io, which travels in an orbit of radius 4.220×108 m with a period of 1.77 days. Calculate the mass of Jupiter from this information.

**Probability**

It should be <= 319.9955

**Probability**

It should be 319

**math**

Reggie knows the length and width of a rectangle. How can he find the perimeter of the rectangle

**Probability**

b=0.471

**Chemistry-need help ASAP**

again don't know where to start, really just want a step by step so I can do the rest of my homework

**Chemistry-need help ASAP**

15 ml of 3.0 M NaOH are added to the following: 500.0 ml of pure water 500.0 ml of 0.1 M formic acid 500.0 ml of 0.1 M formate of potassium 500.0 ml of a solution containing 0.1 M formic acid and 0.1 M formate of potassium. Calculate the difference of pH resulting from the ...

**Chemistry**

i don't even know where to start, I'm really confused on this topic in chemistry, I just want to see at step by step way to solvethis problem.

**Chemistry**

Titration of 50.0 ml of acetic acid reaches equivalence after delivery of 22.5 ml of standardized NaOH 0.21 M. What is the initial concentration of acetic acid and what is the pH of the solution? What is the pH at equivalence? What is the pH after addition of 20.0 ml of NaOH? ...

**physics**

A staging that weighs 210 N supports two painters, one 310 N and the other 440 N. The reading in the left scale is Fℓ = 320 N. What is the reading Fr in the right hand scale? Answer in units of N

**English III**

Could you post the answers you got after turning in the assignment

**physics**

these are the choices for the answer: Consider the rotational motion of two compact discs (CD). Disc A undergoes a rotation of 540 degrees in 1.50 secs, and disc B undergoes a rotation of π radians in 3.00 secs. a) Angular speed (A) = 4π radians/sec Angular speed (B...

**Probability**

4b. ((1-p)*(5*p-1))/(4*p)

**reading**

what general statement you make about Babe Didrikson and women athletes?

**physics113**

Heat can be defined as in phy113

**phy113**

What mass of ice is needed to cool 60g of water from 43oC to 20oC

**phy113**

An ungraduated mercury thermometer attached to a millimeter scale reads 22.8 mm in ice and 242mm in steam at standard pressure. What will the millimeter read when the temperature is. 20oC?

**chemistry**

Quinine is a natural product extracted from the bark of the cinchona tree, which is native to South America. Quinine is used as an antimalarial agent. When 2.50 g of quinine is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 6.43 °C. ...

**math**

CALCULATE if 1/3of the candles are pink 3/8 are yellow and 1/4 is blue remaining 2 are white

**Physics**

A doubly charged ion is accelerated to an energy of 33.0 keV by the electric field between two parallel conducting plates separated by 1.70 cm. What is the electric field strength between the plates?

**Physics**

Two parallel conducting plates are separated by 10.0 cm, and one of them is taken to be at zero volts. (a) What is the electric field strength between them, if the potential 8.50 cm from the zero volt plate (and 1.50 cm from the other) is 540 V? (b) What is the voltage between...

**Science**updated asnwers****

Ms.Sue I know I am not part of this but I hope you know that there are a lot of kids on this site and I don't think you should be saying you have been using drugs. This is not a good influence on younger kids.

**PHysiscs**

Four acrobats of mass 83.5 kg, 68.0 kg, 62.0 kg, and 55.0 kg form a human tower, with each acrobat standing on the shoulders of another acrobat. The 83.5-kg acrobat is at the bottom of the tower. (a) What is the normal force acting on the 83.5-kg acrobat?

**Algebra**

1. (1,3) 2. maximum 3. 42 feet 4. 11, -11 5. -7, -1 6. -6, 4 7. 0, 5/2 8. 3.33 I got 8/8 with this

**Physics**

A truck with 0.100 m radius tires travels at 24.0 m/s. At how many radians per second are the tires rotating? What is this in rpm?

**Physics**

An automobile with 0.310 m radius tires travels 85,000 km before wearing them out. How many revolutions do the tires make, neglecting any backing up and any change in radius due to wear?

**Physics**

In lacrosse, a ball is thrown from a net on the end of a stick by rotating the stick and forearm about the elbow. If the angular velocity of the ball about the elbow joint is 30.0 rad/s and the ball is 1.05 m from the elbow joint, what is the velocity of the ball?

**Physics**

A basketball player is running at 5.00 m/s directly toward the basket when he jumps into the air to dunk the ball. He maintains his horizontal velocity. (a) What vertical velocity does he need to rise 0.750 meters above the floor? (b) How far from the basket (measured in the ...

**Physics**

An archer shoots an arrow at a 78.0 m distant target, the bull's-eye of which is at same height as the release height of the arrow. (a) At what angle must the arrow be released to hit the bull's-eye if its initial speed is 34.0 m/s? (Although neglected here, the ...

**math**

S0rry i meant to say idid this befofe i asked for help. It didn't seem right to me but now the way you did it , i get it

**math**

THANK YOU . Idid 2000 * 29 / 100 =580

**math**

In a recent poll of 2000 households, 29% had pets. How many households did not have pets?

**math**

Thanks i got the same answer in a different way

**math**

Fabric costs14.00 per yard. If you buy 5 yards or more ,you can get 20% off. how much would 5 yards cost on sale?

**Spelling**

iam helping my 4th graders with spelling/reading

**math**

how do you do 33 1/3% of 200.oo? the 1/3 is throwing me off. Thank you

**math**

got it . Thank you

**math**

Pete saved 24.00 of the 60 .oo dollars he earned. What percentage of his earnings did he save ?

**math**

Thanks everyone for the help

**math**

John bought 3 of the same shirt and paid 63.00 after the 30% discount.What was the original price of one of the shirts ? Not sure at all how to do this. Thank you

**math**

how to use a common denominator to write an equivalent fraction for each fraction?

**math**

I need help on how to use a common denominator to write an equivalent fraction for each fraction?number 1 is 1/2,1/3 and number 2 is 7/8,3/10 please help

**chem**

what are the type of chemical reactions for the below (synthesis, double/single displacement or decomposition) 2Na+2H2O->2NaOH+H2 2FeS2+3O2->Fe2O2+2SO2 CaCO3->CO2+CaO 2H2S+2KOH->K2S+2HOH 2Ca+4HOH->2Ca(OH)2+H2

**please check(Social studies)**

5 is D in case anyone is interested

**chemistry**

what is the chemical reactions for these... 2Na+2H2O->2NaOH+H2 2FeS2+3O2->Fe2O2+2SO2 CaCO3->CO2+CaO

**Chemistry**

how do i name this chemical? S(ClO3)2

**Chemistry**

how do i name this chemical? Fe(NO3)2

**chemistry**

i don't know how to write it into a chemical formula

**chemistry**

i need help with writing nomenclature for the formula and the compounds examples: Sodium bisulphate hydroiodic acid ammonium dihydrogen phosphate Zn(HCrO4)2 Calcium metal ferrous bromide sodium carbide phosphate radical liquid mercury plumbic oxide auric carbonite sodium ...

**Algebra**

just curious what grade is this math

**Chemistry check and help**

what is ... Sodium bisulphate hydroiodic acid ammonium dihydrogen phosphate Zn(HCrO4)2 Calcium metal ferrous bromide sodium carbide phosphate radical Check... sodium bicarbonate NaHCO3

**math studies**

A rhombus has diagonals of lenth 12 cm and 7 cm respectively. Find the larger angle of the rhombus

**math 3**

4 layers

**Chemistry**

I am learning the different types of chemical reactions synthesis, decomposition, single displacement, and double displacement I am also learning skeletal equations word equations and balancing the equations I know how to balance equations if I am given the formula in symbols ...

**cHEMISTRY**

i don't know how to write chemical formulas is it like nomenclature because i need to balance equations (which i know how if the equation is given to me the symbols type but not in words), i need to write skeletal equations but i don't know if they are correct. example...

**Social Studies--Check My Answers Please--**

shia is 100