# Posts by bill

Total # Posts: 877

**physics**

A block is pressed against a vertical wall by a force , as the drawing shows. This force can either push the block upward at a constant velocity or allow it to slide downward at a constant velocity. The magnitude of the force is different in the two cases, while the ...

**physics**

Geosynchronous communications satellites are placed in a circular orbit that is 3.59 107 m above the surface of the earth. What is the magnitude of the acceleration due to gravity at this distance?

**microeconomics**

The cost of producing flat-screen TVs has fallen over the past decade. Let’s consider some implications of this fact. A.) Draw a supply-and-demand diagram to show the effect of fallen production costs on the price and quantity of flat-screen TVs sold. B.) In your diagram...

**Pseudocode Format**

Need help writing this using pseudocode format: Carly gets paid annually, and she would like a program that will figure out the amount of money she will be receiving each pay period. To make this simpler, we are not worried about any deductions.

**Pseudocode Format**

Need help writing this into Pseudocode Format: Robert has a van rental company, and he wants a program that determines the total cost of renting a van from him. His customers will pay a base fee (currently set at $50), plus a charge per mile (currently $.25 a mile).

**Chemistry**

A certain gas has a solubility of .50 g/L under a pressure of 1500 torr. What would its solubility be a 2250 torr?

**physics**

kee

**Physics**

In two successive chess moves, a player first moves his queen four squares forward, then moves the queen three steps to the left (from the player’s view). Assume each square is 4.0 on a side.

**Physics**

In two successive chess moves, a player first moves his queen four squares forward, then moves the queen three steps to the left (from the player’s view). Assume each square is 4.0 on a side.

**Physics**

In two successive chess moves, a player first moves his queen four squares forward, then moves the queen three steps to the left (from the player’s view). Assume each square is 4.0 on a side.

**Physics**

In two successive chess moves, a player first moves his queen four squares forward, then moves the queen three steps to the left (from the player’s view). Assume each square is 4.0 on a side.

**ap chemistry**

Doctor Bob a mf savage

**Science**

Person weighing 650N lies on a bed of nails,each nail has area of 1m2 Assume 4Nm^-2 pressure is painful what is the smallest number of nails they could lay on and not be hurt

**Chemistry**

How many milliliters of 1.0 M NaOH must be added to 200. mL of 0.10 M NaH2PO4 to make a buffer solution with a pH of 7.50? (5 points)

**Math**

What is the perimeter of a trapeziod with an area of 96

**physics**

A boy is pushing his sled up a snowy slope. The sled has a mass of 20.4 kg and weighs 200 N. The boy pushes with a constant force of 75 N. The sled travels a distance of 10 m and gains 3 m in height. When the sled reaches the top, it is traveling 2 m/s. What is the efficiency ...

**Statistics**

A pharmaceutical company claims its new medication relieves painful symptoms caused by tension headaches within 15 minutes. To investigate this claim, a local health clinic conducts a study of 45 patients who suffer from chronic tension headaches. Each patient is given ...

**Statistics**

According to a recent pole only 21% of Americans were satisfied with the direction the U.S. is heading. To investigate the reliability of the report an independent polling organization surveyed 500 Americans and inquired as to whether or not they were satisfied with the way ...

**Statistics**

Assume the weights of men are normally distributed having a mean of 185 lbs and a standard deviation of 17 pounds. A. Calculate the probability a randomly selected man weights less than 225 lbs B. Approximately 72% of men’s weights exceed how many pounds. C. In a random ...

**Statistics**

Assume the wait time to see a cardiologist at a certain clinic are uniformly distributed between 7 minutes and 23 minutes. Calculate the probability a randomly selected patient waits at least 18 minutes to see the cardiologist. The random variable, Z, is associated with a ...

**Statistics**

A Manufacturer of torque converters claim only 1% of them are defective. A. Calculate the Mean number of defective converters in a shipment of 500 converters. B. Calculate the standard deviation in the defective torque converters in a shipment of 500 converters. C. Would it be...

**Statistics**

A Manufacturer of torque converters claim only 1% of them are defective. A. In a shipment of 12 torque converters calculate the probability exactly 2 converters are defective. B. In a shipment of 35 converters, calculate the probability at least 1 converter is defective.

**Statistics**

In a certain game of chance a person pays $5 to play a game. A person randomly selects 2 integers ranging from 0-99. The host of the game then uses a random number generator to select 2 integers ranging from 0-99. If the players values and hosts values agree (in any order), ...

**Statistics**

Use this information to calculate the mean and standard deviation of this random variable. P(x)- .25, .05, .55, .15

**Statistics**

A standard deck of 52 playing cards is composed of 4 suits. Each mix contains 13 cards. Jacks, Queens, and Kings are considered face cards. Assume three cards are selected without replacement. Calculate the probability of drawing two hearts, followed by a spade.

**Chemistry**

A solution is prepared by dissolving 571.6 g of H 2SO4 in enough water to make 1000.0 mL of solution. The solution has a density of 1.3294 g/mL. (molar mass of H2SO4 = 98.08). What is the molar concentration of the solution?

**chemistry**

What mass of F2 is needed to produce 116 g of PF3 if the reaction has a 77.4% yield?

**Physics**

35 m/s

**Pre-calculus**

Use this equation. X=t*v*cos(theta) So 2*102*cos67=79.70915021

**Pre-calculus**

79.70915021

**Statistics**

In order to compare two kinds of feed, thirteen pigs are split into two groups, and each group received one feed. The following are the gains in weight (kilograms) after a fixed period of time: Feed A: 8.0 7.4 5.8 6.2 8.8 9.5 Feed B: 12.0 18.2 8.0 9.6 8.2 9.9 10.3 We wish to ...

**World history**

Confucius believed that human beings are essentially A. gods. B. evil. C. good. D. sinful.

**Physics**

27

**chemistry**

What has the higher normal melting point: CHI3 or CHF3? The answer in the book is CHI3. So I'm assuming the answer is CHI3 because Iodine is the bigger and will form larger london dispersion forces, but isn't a stronger dipole moment formed in CHF3 because fluorine is ...

**Cosmology**

UV

**Physics conceptual questions**

You have a drink that you want to cool off? You could put in 100 g of ice or 100 g of water, both at 0 degree C. Which one would be more effective in cooling your drink? Why?

**English**

It should be Opening Statement Supporting Statements Thesis Statement And if you get stuck with that, on each of the steps, you may use the help from the writers online. I like those that work at Prime Writing service. They are 100% reliable

**Math**

Show that (a^2+b^2)(c^2+d^2)=(ac+bd)^2 + (ad-bc)^2

**Math**

Show that (a^2+b^2)(c^2+d^2)=(ac+bd)^2 + (ad-bc)^2

**Math**

Show that (a^2+b^2)(c^2+d^2)=(ac+bd)^2 + (ad-bc)^2

**Math**

9/10?

**SCIENCE -HELP!!**

How does the discovery of seafloor spreading help to explain the mechanism behind why plates move??

**English Please Help**

We're these right?

**Math**

If 1 and –6 are two of the roots of 6x^4 + 31 x^3 − 33x^2 − 16x + 12, then what are the other two? A. 2 and 3/2 B. -1 and 6 C. 1/2 and -2/3 D. -2 and 2/3

**algerbra**

If 1 and –6 are two of the roots of 6x^4 + 31 x^3 − 33x^2 − 16x + 12, then what are the other two? A. 2 and 3/2 B. -1 and 6 C. 1/2 and -2/3 D. -2 and 2/3

**Physics**

21) A 46 kg skater is standing still in front of a wall. By pushing against the wall she propels herself backward with a velocity of – 1.2 m /s. Her hands are in contact with the wall for 0.8 s. Ignore friction and wind resistance • Find the magnitude and direction ...

**Physics**

A 4 ohm resistor and 10 ohm resistor are connected in series. If this circuit is connected to a 12 V battery, how much current will flow through the circuit?

**college algebra--please help**

What percent of the total population is found between the mean and a z-score of -0.50?

**Science**

Intensity of the HeNe laser (lambda = 632nm) was measured at 2 distances: 1m and 200m from the laser. The meter reading was 10W and 1W correspondingly. How many photons/sec will enter your eye if you look into the laser from 1m? From 2m? Assume that radius of the pupil was 2....

**Algebra 2**

Plan A charges $5 per minute plus a one time monthly fee of $75 and plan B charges $7 per minute, plus a one time monthly fee of $25. After how many minutes will the total cost of the two equations be the same?

**Binomial Probability**

Before 1918, wolves were shown as 55% male, 45% female. From 1918 to present they were shown as 70% male and 30% female. In a random sample of 12 wolves, what was the probability that 6 were male? What was the probibility that 6 or more were female? What was the probability ...

**Sociology**

In the twentieth centruy, which country had a caste system based on race? a. India b. the USA c. South Africa d. a and b only e. b and c only

**Chemistry**

What does 3p have?

**HELP ASAP**

I need help asap!

**Chemistry**

What quantum numbers specify these subshells? 2s n= l= 3p n= t= 6d n= l=

**Chemistry**

Thanks it was correct!

**HELP ASAP**

I need help asap!

**Chemistry**

What element forms an ion with an electronic configuration of [Xe] and a –2 charge?

**NEED HELP**

Is it Argon?

**Chemistry**

Metals lose electrons under certain conditions to attain a noble-gas electron configuration. How many electrons must be lost by the element Ca? Is it 2 e^-? Which noble-gas electron configuration is attained in this process? argon radon krypton xenon helium neon

**Chemistry**

Assuming that the smallest measurable wavelength in an experiment is 0.330 fm (femtometers), what is the maximum mass of an object traveling at 157 m·s^–1 for which the de Broglie wavelength is observable? mass = ? kg

**College Chemistry**

What volume of the solution in 5a would be necessary to react completely with 23.00mL of 0.549M NH3 according to the equation: NiSO4+6NH3 -> [Ni(NH3)6]SO4 The molarity of ta is 1.667 x 10^-4M

**Calculus**

What is the point of inflection of the function f(x)=x^3-8x^2+5x+50? Is the local extrema at f(1/3)=50.8 max and f(5)=0 min? For the second derivative I got f(x)=6x-16 and then got x=16/6 when set to zero.

**Chemisty HELP ASAP**

In this problem, your answers should be mathematical expressions involving a variable. Consider an ideal gas with an absolute temperature of T1 To what temperature would you need to heat the gas to double its pressure? T2=? I got T2=2P but it is wrong

**Chemistry**

It is 65.4g/mol

**Chemistry**

P=.995atm V=.205L n=? R=.0821 Lxatm/molxk) T=298K

**Chemistry**

n=.0833 mols molar mass=(.0833mols/.528g)=.158g/mol

**Chemistry**

A 0.528 gram sample of a metal, M, reacts completely with sulfuric acid according to: M+H2SO4 -> MSO4+H2 A volume of 205 mL of hydrogen is collected over water; the water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 756.0 Torr and...

**Chemistry**

T2=?

**Chemistry**

In this problem, your answers should be mathematical expressions involving a variable. Consider an ideal gas with an absolute temperature of T1 To what temperature would you need to heat the gas to double its pressure? T2=? I got T2=T1P times 2 but it is wrong

**Chemistry Answer?**

Is the answer 3.24x10^-3 g/mol?

**Chemistry**

A 0.528 gram sample of a metal, M, reacts completely with sulfuric acid according to: M+H2SO4 -> MSO4+H2 A volume of 205 mL of hydrogen is collected over water; the water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 756.0 Torr and...

**Chemistry**

T1 is 288K but what is T2?

**Chemistry**

2.05 g of an unknown gas at 45 °C and 1.00 atm is stored in a 1.15-L flask. What is the density of the gas?

**Chemistry**

At a certain temperature and pressure, one liter of CO2 gas weighs 1.45 g. What is the mass of one liter of C4H10 gas at the same temperature and pressure?

**Chemistry**

Is the answer 1.85x10^6 L?

**Chemistry**

A hot air balloon is filled with 1.39 × 106 L of an ideal gas on a cool morning (11 °C). The air is heated to 105 °C. What is the volume of the air in the balloon after it is heated? Assume that none of the gas escapes from the balloon.

**Chemistry**

An ideal gas is allowed to expand from 6.00 L to 45.0 L at constant temperature. By what factor does the volume increase? ? Number The pressure will Increase by that factor or decrease by that factor? If the initial pressure was 105 atm, what is the final pressure?

**Math HELPPP**

In a survey of 2000 adults 50 years and older of whom 40% were retired and 60% were pre-retired, the following question was asked: Do you expect your income needs to vary from year to year in retirement? Of those who were retired, 33% answered no, and 67% answered yes. Of ...

**Calculus**

What is the derivative of 7e^(3sin^(4x+5))?

**Calculus**

What is the derivative of 2^(5x)tan(x^2)

**Calculus**

What is the derivative of sin(3x+1)^4?

**Calculus**

Find dy/dx using implicit differentiation of xy + sin^2y=10350. Is it -y/(x+2siny)

**Calculus**

Dervative of cos(x) is -sin(x) so it would be negative.

**Math**

How do you solve this equation; There are 128 7th graders at Mark's school, if there are 16 more girls than boys, how many 7th grade boys are there?

**Physics**

From the window of a building, a ball is tossed from a height y0 above the ground with an initial velocity of 9.40 m/s and angle of 23.0° below the horizontal. It strikes the ground 5.00 s later. By how much does the ball clear or fall short (vertically) of clearing the ...

**Physics**

From the window of a building, a ball is tossed from a height y0 above the ground with an initial velocity of 9.40 m/s and angle of 23.0° below the horizontal. It strikes the ground 5.00 s later. By how much does the ball clear or fall short (vertically) of clearing the ...

**writing (persuasive essay)**

Hi. I'm in 10th grade and our teacher assigned us a persuasive essay to write in class over a topic that we debated about for the last two weeks. Every team had a different topics (mine was school should start from 11 am. to 5 pm), but now we're going to write a ...

**math**

write 718.5 in scientific notation

**Physics**

A swimmer, capable of swimming at a speed of 0.8 m/s in still water (i.e., the swimmer can swim with a speed of 0.8 m/s relative to the water), starts to swim directly across a 2.5 km wide river. However, the current is 0.91 m/s, and it carries the swimmer downstream.

**6th grade math**

the answer is 15 because nothing inside the lines can be negitive

**english**

what word do these letters make

**algebra**

a rectangle has a length of 17 inches more than twice its height. If the perimeter of a rectangle is 304 inches, find its dimensions.

**Computers**

double **dptr; dptr = new double*[5]; for (int i = 0; i < 5; i++) dptr[i] = new double[3]; How many rows and columns will there be in dptr? Also, what would the code look like to Delete all the space allocated for dptr???

**geometry**

If EF=10x+12,FG=14,and EG=136, find the value of x.

**biology**

1234

**Microeconomics**

200

**world literature**

Do your own homework or ask the teacher for help!

**Chemistry II**

43.4

**Spanish**

plastico