# Posts by bill

Total # Posts: 897

physics
What is the average useful power output of a person who does 5.50×106 J of useful work in 6.50 h? Working at this rate, how long will it take this person to lift 1850 kg of bricks 1.20 m to a platform? (Work done to lift his body can be omitted because it is not ...

Math
2/10+13/100

math
I am prepping for a mid-term. A deep sea diving bell is lowered at a rate (constant). After 10 min, the bell is at a depth of 300 ft. After 30 min the bell is at a depth of 1400 feet. What is the ave. rate of lowering per minute? Thanks

Algebra
69

Physics
A quarter on a spinning vinyl record has a centripetal acceleration of 34.0 m/s2. What is the acceleration of the quarter if it is placed twice as far from the centre of the vinyl record?

Physics
a. 800

Biology
Nvmd I just found out it was D.

Biology
What are the roles of hydrogen peroxide, oxygen, hydrogen, and catalase in the following chemical reaction? catalase 2H2O2 > O2 + 2H2O A. Catalase is an enzyme, O2 and H2O are substrates, and H2O2 is a reactant. B. Catalase is a substrate, O2 and H2O are substrates, and ...

math
How many degrees are in the smaller angle formed by the minute and hour hands on a clock at 12:30?

Math
insert +, -, X, /, and () to make each math statement true 4 4 4 4 = 10 4 4 4 4 = 6

math
What fraction of a square mile is a field that is 1/2 mile long and 1/4 mile wide?

Math
How do I convert numbers into percentages. The all of the percentage is out of 50%.

Spanish
Did you ever get the answers bro?

Statistics
The weight of bags of pretzels are normally distributed with a mean of 150 grams and a standard deviation of 5 grams. Bags in the upper 4.5% are too heavy and must be repackaged. Also, the bags in the lower 5% do not meet the minimum weight requirement and must be repackaged. ...

math
ell whether each equation has one solution, zero solutions or infinite solutions 5(x-3)+6=4x+3

math
tell whether each equation has one solution, zero solutions or infinite solutions 5(x-3)+6=5x-9

World History
thank you

World History
Weird. I've never told anyone to do the writing for me, simply to help me out since my brain apparently can't comprehend.

World History
Thank you, Ms. Sue! Do you mind if you made it easier for me like one sentence on how they united Italy?

World History
@Ms. Sue I don't understand how an intellectual, a statesman, and a fighter united Italy.

World History
(Need help with this prompt, just one paragraph will do) It is 1870, French forces leave Italy (to fight in the Franco-Prussian War) and Italians triumphantly declare Rome their united capital. You have been hired by Vittorio Emanuele II, the King of Italy, to write a ...

Chemistry
Dr. Bob is the greatest person of all time if he answers this

Chemistry
What is the approximate ratio of the solubility of CaSO4 (Ksp = 2.4 x 10?5) in pure water to the solubility of CaSO4 in 0.10 M Na2SO4 at the same temperature?

Chemistry
Calculate how many moles of Na2S2O3 must be added to dissolve 0.020 mol AgBr in 1.0 L of water at 25°C (assume constant volume). AgBr(s) ? Ag+(aq) + Br?(aq) Ksp = 3.3 x 10^?13 Ag+(aq) + 2S2O32?(aq) ? [Ag(S2O3)2]3?(aq) Kf = 2.0 x 10^13 (1) 0.0078 mol (2) 0.048 mol (3) 0.040...

Chemistry
Find the ratio of the volumes of NaC3H5O3 soloution to HC3H5O3 (lactic acid) required to prepare a buffer with a pH of 3.90. the solutions are equal in molarity. Ka = 1.4 x 10-4 for HC3H5O3. ratio = ________ mL of NaC3H5O3 per mL of HC3H5O3

Chemistry
Find the pH of a buffer solution with equimolar concentrations of: HCOOH and NaCOOH (Ka = 3.5 x 10-4 for HCOOH)a

Algebra
If there are 8 sharpeners in every box, is the formula that relates s Sharpeners and B boxes B=8s or S=8B?

Algreba
Write an equation of the line that passes through the given point and is perpendicular to the given line (2,3), x+2y=-7

history
how did america's economy change after the civil war.

Geometry
What's the lateral area of a right cylinder if the radius of the base is 12 mm and the altitude of the cylinder is 5 times the base radius?

English
These answers are 100 percent wrong

science
How do scientists explain the fact that some landforms that are far apart and separated by oceans appear to be related?

Chemistry
Consider two equally sized balloons at room temperature, one filled with oxygen gas and one filled with an unknown gas. If the balloon filled with oxygen gas deflates in 37 hours and the other balloon deflates in 26 hours, which of the following is the most likely identity of ...

Chemistry
this man is a savage ^

Chemistry
If 2.00 g of element G reacts with 5.00 g of element M to produce 7.00 g of a compound with the formula G3M2, what is the atomic mass of G if the atomic mass of M is 135.0 amu? Answer is 36 amu but why

Chemistry
If the change in temperature of a sugar added solution of water increased its boiling point by 0.6C how many moles of sugar was added to the water?

Physics
a softball batter hits a fly ball that is caught 3.8 seconds later, 88m from home plate. The ball is caught at the same height from which it was thrown. What was its initial velocity? What is the maximum height above its launch point that it reached?

Mathematics
Butt

Math
A teacher has 27 students in her class.she asks the students to form as many groups of 4 as possible.how many students will not be in a group

Algebra
Thanks and its burrito is 3 and taco is 2 right ?

Algebra
You and a friend eat tacos. You order 2 tacos and 5 burritos which equals $19. Your friend orders 1 taco and 4 burritos which equals$14. Find the cost of a taco and a burrito. Please help

Integrated Math
If (c) were f(x)=-4/(k+7) what value of k would be excluded from the domain? I know that we cant have 0 in the denominator. I solved the following: k+7=0 Value cannot be -7

algebra
How do I solve d=ut+(1/2)at^2

Organic chemistry
How many nodes are in the pi* orbital of a carbon-carbon double bond? Please explain. Thanks in advance.

math
Eight people rob a bank: What percent of the loot belongs to three people if they decide to share it evenly

Economics/Finance
How much Jim can accumulate in a private pension fund over 20 years if the fund offers 5% interest compounded annually, and he can afford to deposit&...

physics
an initially resting 300g car is dragged along a horizontal frictionless table by a massless cord. The cord is attached to vertically hanging 60g mass by a frictionless massless pulley. If the car starts from rest, determine the time it would take for it to move 20 cm.

science
Methane =CH4 Molecular mass of CH4 is 16 There are 32g of CH4 Find the moles of CH4 by dividing it's mass by its molecular mass: n=32/16 n=2 moles (CH4) Since methane (CH4) contains 4 hydrogen atoms per mole, then 2 moles of methane would mean there are 8 moles of hydrogen...

math
a board of 4 members is going to be formed from the 30 students of a class. The board is formed of a president a vice president a secretary and a treasurer. What is the number of possible boards knowing that each of the 30 students can occupy any post?

math
four girls bought each a swimsuit and decided to borrow among themselves. How many possible ways can they dress up knowing that each girl can use the same swimsuit only once?

math(counting)
an anagram of a word is obtained by permuting its letters. a-how many anagrams does the word "MAIRE" have b-Same question for the word "OISEAU"

math(counting)
in how many different ways can 3 boys and 2 girls sit on a bench? in how many different ways can they sit knowing that the boys have to sit near each other and the girls also

Point $G$ is the midpoint of median $\overline{XM}$ of $\triangle XYZ$. Point $H$ is the midpoint of $\overline{XY}$, and point $T$ is the intersection of $\overline{HM}$ and $\overline{YG}$. Find the area of $\triangle MTG$ if $[XYZ] =150$.

Geometry
Altitudes $\overline{XD}$ and $\overline{YE}$ of acute triangle $\triangle XYZ$ intersect at point $H$. If the altitudes intersect at a $123^\circ$ angle, and $\angle YXH = 26^\circ$, then what is $\angle HZX$ in degrees?

Math
Points J and K, plotted on the coordinate grid, are two vertices of rectangle JKLM. Rectangle JKLM has an area of 7 square units. Point J is located at (2, 1) and point K is located at (-5, 1). Each vertex of the rectangle is located at a point that has integer coordinates.

science
did you find out yet

Algebra
AAAAAAAhhHHHH I need a answer too

stas
find the probability of correctly answering the first 2 questions on a multiple choice test if random guesses are made and each question has six possible answers

Health
what are all the answers to the quiz? in connexus

English
*than

English
#1 means it took him 5 days to read the book. In other words. He finished the book in 5 days. #2 means he waited 5 days to START reading the book. It doesn't mean he finished reading the book from what I can tell. #3 probably means he finished reading the book in LESS Than...

Science
The force in the horizontal direction doesn't affect the mass. You would need to know the force of gravity (in newtons) on the box and the acceleration of gravity which is 9.8m/s^2 on Earth.

Algebra 2
Q: What represents the sum of a geometric series with 8 terms whose first term is 3 and common ratio is 4. A: 65,535 Is my answer right? I wasn't sure when adding up the terms versus using Sigma notation.

science fair
will a heavy metal spring launch a baseball 7 feet in the air with 5 pounds of preasure

Chemistry
A 3.50L balloon contains 0.178 mol of gas. If 0.094 mol of gas is added to the balloon, what will be the new volume?

physics
A rocket blasts off from rest and attains a speed of 49 m/s in 16 s. An astronaut has a mass of 56.3 kg. What is the astronaut's apparent weight during take off?

Physics
A 1000-kg aircraft going 25 m/s collides with a 1500-kg aircraft that is parked. They stick together after the collision and are moving at 10 m/s. If they skid for 30 seconds before stopping, how far (in meters) did they skid? Hint: Are the aircraft moving at a constant ...

Chemistry
9.299 grams

Chemistry
Molar mass of H2O = 18.0 g/mol 18 g ------> 6.02x10^23 atoms g -------> 3.11x10^23 atoms ( 3.11x10^23) * 18 / 6.02x10^23 5.598x10^24 / 6.02x10^23 = 9.299 gramas hope thi helps!.

Chemistry
Percent of gas (C2H2 ) formed.

Chemistry
What is the percentage of gas (C2H2) formed when 2.66g of calcium carbide (CaC2) reacts completely with 50g water?

math
how long would it take a car traveling 175 mph to go 26 miles?

Chemistry
Calculate the equilibrium constant for the equilibrium knowing that there are 2 moles of O2 H2, 6 moles of O2 and 3 moles of H2O in a jar reactor 2L? 2 H2 + O2 = 2 H2O

Algebra
Nevermind guys, I solved it. For future strugglers: equation A: 3a+12s=262.5 equation B: 4a+8s=230 multiply equation B so that a variable can be negated when you add the two equations together. In this case I chose variable (S) so i multiplied equation B by -1.5 so that -3a=-...

Algebra
Math club purchased 3 adult tickets and 12 student tickets for $262.50. Physics club purchased 4 adult tickets and 8 student tickets for$230.00. How much do the adult and student tickets cost?

Maths
The nth term and the sum of n terms of a geometric sequence are 5 and 55 respectively. If the commom ratio is -(1/2)n find the first term and value of n

Math
If a person throws 3 darts at a dartboard, how many possible combinations are there to get a sum of 34?

Physics
A baseball player hits a home run over the left-field fence, which is 104 m from home plate. The ball is hit at a point 1.08 m directly above home plate, with an initial velocity directed 35.0° above the horizontal. By what distance does the baseball clear the 3.00 m high ...

US History
probaly england

math
how much dose 1 cup of sugar cost?

Chemestry
Iron metal reacts with oxygen gas to form rust, iron (III) oxide. Which of the following correctly shows the balanced equation for this reaction?

math help pls pls
the answer is sometimes i recommend you google it first

Algebra
17n+11 - (5n+6) - (4n+5) =9

Calculus
The amount remaining of a radioactive substance after t hours is given by A(t) = 100ekt. After 12 hours, the initial amount has decreased by 4%. How much remains after 48 hours? What is the half-life of the substance?

Physics
Damon, Where do you suggest I look for an approximate mph figure. I realize we are ignoring key factors, but surely someone can give me an educated guess - - e.g. the body would hit the ground at 100 mph plus or minus 10 mph. Thanks

Physics
A 180 pound body is dropped from a helicopter 5 miles (26400 ft.) up - - what maximum speed would the body attain, in miles per hour, before hitting the ground? Disregard gravity, air density, etc. factors, a very rough approximation is all that is needed. Thanks.

Physics
If a 180 pound body is dropped from an airplane 5 miles (26400 ft.) up: a/ how long would it take for the body to reach the ground? b/ what would be the maximum speed the body would attain in miles per hour? Close approximations are all that are required here. Thanks.

Physics
If a 180 pound body was dropped from a plane 5 miles in the air - how long would it take for the body to reach the ground?

math
Independent random samples, each containing 800 observations, were selected from two binomial populations. The samples from populations 1 and 2 produced 320 and 400 successes, respectively. Construct a 90% confidence interval for the true difference in population proportions ...

math
Suppose x has a binomial probability distribution with n = 200 and p = 0.60. Use the normal approximation to the binomial to find P (X > 130).

Physics
The instruments attached to a balloon have a mass of 5kg. The balloon is released and exerts an upward force of 100 N. After the balloon has accelerated for 10s, the instruments are released. What is the velocity of the instruments at the moment of release?

Physics
The driver of a car is going 90 km/hr suddenly sees a barrier40m ahead. It takes the driver .75 sec to apply the brakes, and the average acceleration during braking is -10m/s^2. Will the car hit the barrier and use calculation to show work.

Physics
10.234234

Trig
mercury rotates around the sun in approx. 89 earth days (or 7,689,600 s. use a calculator to approximate its angular speed. choices: 4.09x10^-7 0.035 0.071 8.17x10^-7

Did you read The Pig Man And Me
John Quinn does not explain the rule about the paddle to Paul, the narrator of “The Pigman & Me.” How does this one action affect the rest of the essay?

Chemistry
1.9*10^-5

HELP SCIENCE ASAP
How are fish, amphibians, reptiles, and birds alike? How are they different? Include at least two similarities and two differences.

ela
Which section of a personal narrative requires the most development? a. introduction b. conclusion c. character introduction d. plot my answer is a can you check it for me

ELA HELP FAST
Which section of a personal narrative requires the most development? a. introduction b. conclusion c. character introduction d. plot

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