Posts by Sam

Total # Posts: 5,191

chemistry
How much heat is released when 28.95g of water is frozen?

math
A colony of bacteria is growing in a petri dish which has a maximum capacity of 100mg. The mass of bacteria is increasing at a rate given by the logistic equation. Initially there is 2mg of bacteria and the rate of increase is 1mg per day.

Statistics
Its x~Bin(32,.98) since were looking for when it WILL operate and x = 32.

Math
Mandy scores b points in a basketball game. Jay scores 3 points less than Mandy. Kareem scores 2 times as many points as Mandy. Find the number of points that Jay scores in terms of b.

Chemistry
how do i figure out the valences for elements in the transition elements section in the periodic table of elements (i need it for doing nomenclature) and how do i figure out the valences if i don't have the periodic table of elements examples: Zn Cu Ni Co Fe Mn Cr V Ti Sc

Social Studies--Check My Answers Please--
100% thanks Diana!

science
Southeaster

statistics
Suppose that each unit of a system is up with probability 2/3 and down with probability 1/3. Different units are independent. For each one of the systems shown below, calculate the probability that the whole system is up (that is, that there exists a path from the left end to ...

Math
Perimeter of rectangle = 2*l+b. Area = l*b. If l = 1m, b = 55cm. Find area and perimeter

Chemistry check and help
so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements? ex. P02 the P for Phosphorus doesn't have a number does it mean it is a one then ex.SO3 ...

Chemistry
so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements? ex. P02 the P for Phosphorus doesn't have a number does it mean it is a one then ex.SO3 ...

Chemistry
i need to write to chemical formula for sulphur(II)iodide but both are non metals what do i do and i get confused sometimes cause i don't know when the metal/non metal gets a one charge (for the valences) ex. NiO =Ni1O2 =Ni2O =Nickel(I)Oxide ex. NiF2 =Ni1F2 =Ni2F =Nickel(...

math
Thank you for working with me on math problems

math
So would it be 100 x 8 / 16 =50 lbs ?

math
How many pounds of nails will be needed to fill 100 boxes with 8oz. of nails in each?

Chemistry
I am supposed to name this using IUPAC method for binary compounds (i think) arsenic(111) sulfide silicon tetraiodide antimony (111)bromide ammonia gas lead(11) and the things in the brackets are supposed to be the roman numerals

physics
After falling from rest at a height of 31.5 m, a 0.564 kg ball rebounds upward, reaching a height of 20.2 m. If the contact between ball and ground lasted 1.80 ms, what average force was exerted on the ball?

physics
The initial velocity of a 1.55 kg block sliding down a frictionless inclined plane is found to be 1.27 m/s. Then 1.07 s later, it has a velocity of 5.37 m/s. What is the angle of the plane with respect to the horizontal?

Random
Why is society unfair?

math-fractions
Thank you

math-fractions
I have to tell the answer in terms of fractions. My doubt is whether it is 9/12 + 6/12 = 15/12 or 15/24 ?

math-fractions
Each band member had 12 tickets to sell, Jamie sold 9 of his tickets Matt sold 6 of his tickets. Using fractions find the total number of tickets sold by Jamie & Matt

soc. stud. --- check my work pls!!!
Diana is right 100% thanks so much

math
You all are terrible at this and Steve is so wrong like all the time. 3*4*5 = 60

Social Studies
10. Which of the following was Daniel Webster speaking of when he declared, "Liberty and Union, now and forever, on and inseparable!"? A) regional differences*** B) international differences C) improved transportation D) improved industry Is my answer correct?

Science
yeah

Social Studies
THANK YOU SO MUCH! THIS HELPS!

Social Studies
What did the Monroe Doctrine hope to accomplish?

Social Studies
Oh.. umm thanks

Social Studies
Is my answer correct?

Social Studies
During the early 1800s, the United States tried to make peace with other countries in order to grow and develop. Give an example of one of these peace efforts and briefly explain what it hoped to accomplish. An example of one of the peace efforts was the Missouri Compromise. ...

ap chemistry
5.63

Writing
Thanks! :)

Writing
Which sentence is punctuated correctly? (To see that it's italicized, I quoted it in *) A. The article called "A Persistent Rebel" in *American History* magazine told about Elizabeth Blackwell. B. The article called *A Persistent Rebel* in *American History* ...

Science
Which Of the following differs when comparing the deep ocean to the intertidal zone?? A) Need for Energy B) Salinity C) The amount of sunlight* D) Reliance on phytoplankton

math
I go to connexus these are the real answers i got 1/10 SCREW YOU KAT B A C D B D C A A C

math
is he right or wrong???

EARTH SCIENCE
When the water level of a stream or river exceeds its natural banks, it has reached its

URGENT PHYSICS
A hammer thrower accelerates the hammer (mass = 7.30 kg) from rest within four full turns (revolutions) and releases it at a speed of 21.0 m/s. Assuming a uniform rate of increase in angular velocity and a radius of 0.80 m, calculate the angle of this force with respect to the...

Politics
Considers the senate opinion

English
Thanks a bunch!! :D

English
Which of the sentences below is punctuated correctly? A. "You know," Steven said, "I've never been to the zoo." B. . "You know" Steven said, "I've never been to the zoo." C. "You know," Stephen said, "I've ...

math
The blue line of best fit for boys intersects the vertical axis at 20 inches and the point (12.5, 25). Which equation best describes the boy's line of best fit?

physics
A)Eddie the Eagle, British Olympic ski jumper, is attempting his most mediocre jump yet. After leaving the end of the ski ramp, he lands downhill at a point that is displaced 53.0 m horizontally from the edge of the ramp. His velocity just before landing is 26.0 m/s and points...

algebra
Determine the equation of g (x) that results from translating the function f(x)=x^2+5 upward 13 units.

Math
Two minor league basebal players got a total of 396 hits. Washington has 8 more hits than sanchez. Find the number of hits for each player. Please help!

Math
Mr Townes created a 2foot wide garden path around a circular garden. The radius of the garden is 7 feet. He wants to cover the path in stones. If mr. Townes needs 1 bag of stones for every 5 square feet of path, how many bags of stones will he need to cover his garden path?

history help plzzzzzz
Yes its from Flvs 8th Grade U.S. History

Algebra
A rectangular dog pen has a perimeter of 10 yd and a width of 2yd. What is its area?

college physics
To tighten a bolt, you push with a force of 76N at the end of a wrench handle that is 0.26m from the axis of the bolt. What torque are you exerting?

math
A ladder is 2 m long. It leans against a wall so that it is 90 cm from the base of the wall. How far up the wall does the ladder reach? Put your answer in m. Round to 3 sig fig.

Chemistry
How did you get -.52?

Chemistry
Colligative Properties The freezing point of distilled water was determined by recording a thermogram: -0.176 degrees Celsius. The freezing point of a 0.200 m (molality) solution containing an unknown, ionic compound was determined by recording a second thermogram: -.904 ...

chemistry
calculate the percentages by mass of the component element in sodium trioxonitrate(v)

Chemistry
The freezing point of a .200m solution: -.904 degrees Celsius.

Chemistry
Colligative Properties The freezing point of distilled water was determined by recording a thermogram: -0.176. The freezing point of a 0.200 m (molality) solution containing an unknown, ionic compound was determined by recording a second thermogram. a. Determine the freezing ...

Physics
A baggage carousel at an airport is rotating with an angular speed of 0.397 rad/s when the baggage begins to be loaded onto it. The moment of inertia of the carousel is 2440 kg·m2. Ten pieces of baggage with an average mass of 16.5 kg each are dropped vertically onto ...

Physics
A stationary bicycle is raised off the ground, and its front wheel (m = 1.70 kg) is rotating at an angular velocity of 21.9 rad/s (see the figure). The front brake is then applied for 1.35 s, and the wheel slows down to 4.47 rad/s. Assume that all the mass of the wheel is ...

algebra
thanks steve

algebra
suppose a ball is thrown upward from a height of 4.5 feet with an initial velocity of 21 feet per second. write an equation relating the time t and height h of the ball

English
the answer is b

English
no b

Steve
How do I find the vertex?

Damon
Sorry you were right my unit was wrong, thanks!

steve
As my final answer do I use ft or m ?

Damon
yes

Damon
Okay this time my answer came to be 39.4 m but it still says incorrect. Did I not do my calculations correctly?

Damon
When I did that My answer came to be .501 but it was marked wrong. Was that the answer I was supposed to get?

physics
A lighthouse that rises h1 = 47.0 ft above the surface of the water sits on a rocky cliff that extends d = 17.4 ft from its base, as shown in the figure below. A sailor on the deck of a ship sights the top of the lighthouse at an angle of theta = 29.3 degree above the ...

Damon
I know but which values do I plug in?

Damon
For part E which x and y do I plug in?

physics
Data: theta_1 = 44.9 theta_2 = 146.1 A = 4.8 cm B = 8.7 cm A)What is the x component of vector A? B)What is the y component of vector A? C)What is the x component of vector B? D)What is the y component of vector B? E)What is the magnitude of vector (A + B)?

Damon
yes in terms of vf. we are asked to combine different kinematic equations to drive xf. I believe the equation v=vo+at^2 can sub for vo. does this make sense?

Physics
A hot-air balloon is rising upward with a constant speed of 2.20 m/s. When the balloon is 2.50 m above the ground, the balloonist accidentally drops a compass over the side of the balloon. How much time elapses before the compass hits the ground?

math
16 times 4 which equals 64 so the length of the rope was 64 inches

math
1/3 is the probability that Tom will score 24 or more times in tonight's game.

math
I do not understand what the question is.

maths
No it is actually 2 hundredths or 2/100. Hope this helps!

physics
A model rocket is launched straight upward with an initial speed of 47.7 m/s. It accelerates with a constant upward acceleration of 2.02 m/s2 until its engines stop at an altitude of 157 m. What is the maximum height reached by the rocket?

math
24 of each or 4 chicken paddies packs and 3 bun packs

Math
The answer is \$510

Social Studies
I'm not so sure about the answers to these questions. Could you check my answers please? Thanks. Who led the federal troops that forced the Cherokee west on the trail of tears? -Andrew Jackson -Winfield Scott -William Henry Harrison** -Oliver Hazard Perry To win the ...

Math
What is the value of the following expression? - 3| -3 + 6| - 3

math
Eduardo thinks of a number between 1 and 20 that has exactly 5 factors . what number is he thinking of ? explain

Physics
how much energy is required to change 40 g of ice at -10 C to steam at 110 C?

Physics
a ball is given a velocity of 3.89 m/s at an angle of 32 degrees. Calculate the maximum height and the range of the ball after 5.0s.

Physics
A car traveling with an initial velocity of 68 km/h accelerates uniformly at a rate of 1.35 m/s^2 for 4.7s. Find the final speed and displacement of the car during the specified time interval.

Physics
A bus slows down uniformly from 75 km/h to 15 km/h in 12.55 s. How far did the car travel before stopping?

Physics
Henry walks 20 km west forgot his coat, so he turns and heads 13 km east. He decided to go another path to make up for the lost time and travels 30 km south and then moves west for 27 km. Calculate Henry's displacement.

physics
A child and a sled have a combined mass of 87.5 kg slides down a friction-less hill that is 7.34 m high. If the sled starts from rest, what is the velocity of the sled at the bottom of the hill?

math
Use synthetic division to find the quotient and remainder. (r^2-2r+2), (r-1)

Science Please HELP!!!
Which of the following are structures that rely on capillaries for exchange or movement of small molecules? 1 teeth, aorta, ureter 2 cartilage, epidermis, larynx 3 nephron, villi, alveoli 4 leukocytes, atrium, bronchi answer #2

8th Grade Connections Academy
What connection academy at ripon?

Science Please HELP!!!
Ms.Sue?

Science Please HELP!!!
1 teeth, aorta, ureter 2 cartilage, epidermis, larynx 3 nephron, villi, alveoli 4 leukocytes, atrium, bronchi answer #2

Science Please HELP!!!
Please anyone!!!

Science Please HELP!!!
Which of the following are structures that rely on capillaries for exchange or movement of small molecules?

Physics
A car of mass 900.0 kg accelerates away from an intersection on a horizontal road. When the car speed is 49.7 km/hr (13.8 m/s), the net power which the engine supplies is 4300.0 W (in addition to the extra power required to make up for air resistance and friction). Calculate ...

math
thank you starting to get it little by little

math
how would you do the following 12 divided by 2 7/8, 1 1/6 x 3 3/8 ,

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