Friday
April 18, 2014

Posts by jb


Total # Posts: 56

physics
A 58.2 g object is attached to a horizontal spring with a spring constant of 11.8 N/m and released from rest with an amplitude of 24.4 cm. What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless?

grammar
The carriage has crossed the bridge and arrived at the mansion. The carriage crossed the bridge and has arrived at the mansion. ???

grammar
directions: rewrite the 2 sentences as 1 sentence by combining the main verbs and helping verbs...The carriage has crossed the bridge. The carriage has arrived at the mansion.

Business
Which of the following statements about the money invested in a traditional IRA account is correct? A.it isn't taxed until it's withdrawn. B.it's subject to double taxation. C.it's taxed as you make deposits. D.it isn't taxed.

College Physics
A block weighing 70.0 N rests on a plane inclined at 25.0° to the horizontal. A force F is applied to the object at 50.0° to the horizontal, pushing it upward on the plane. The coefficients of static and kinetic friction between the block and the plane are, respectivel...

College Physics
A rifle bullet with a mass of 17.5 g traveling toward the right at 293 m/s strikes a large bag of sand and penetrates it to a depth of 23.6 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.

Physics
please help me if you can. I have no values, just diagrams. the first diagram: a box is attached to a rope and pulled along a floor with the rope parallel to the floor. The second diagram: a box is attached to a rope and pulled along a floor with the rope at an angle (upwards)...

Physics
well I have 3 diagrams and I'm supposed to rank them in order of strongest normal force to weakest normal force, so I'm just not sure how to tell which is the strongest.

Physics
How can you tell which force diagrams have a strong normal force and which ones have a weak normal force?

physics
if the reaction time is 10.0s, how far will the car travel before hitting the brakes? Vf = 27.42 m initial speed = 80 km/hr coefficient of friction = 1.00

Business HELP!!!
Number 8 is D

AAT
those are supposed to be square root symbols. I'm not sure what happened...

AAT
ã3tanx=3tanxcscx-ã3tanx

Chemistry
Thank you so much! Another question, the directions say, Determine the [H3O] and [OH] of each of the following solutions. Lime Juice, pH= 1.9 Kitchen Cleaner, pOH= 4.75 Tomato Juice, pH= 4.23 How do I do this?

Chemistry
I think i figured it out, would the pH be .9?

Chemistry
hi DrBob222, thanks for your help. I understand that part, but how do you solve it using only the molarity?

Chemistry
what are the pH and the pOH of 0.125M HCIO4?

math
solve for sine theta of 3.14/3

statistics
about 13% of the population is nervous around strangers. If 2 people are randomally seclected, what is the probability that both are nervous around strangers?

College Algebra
Verify the function f and g, are inverses of each other by showing that f(g(x))=x and g(f(x))=x Graph the functions. f(x)=6/(1-x) g(x)=(1-6/x)

Rational Zeros
List all possible rational zeros for the polynomial below. Find all real zeros of the polynomial and factor f(x)=2x^4+19x^3+37x^2-55x-75

Functions/End behavior
f(x)=x^2(x^2-2)(x+2) Determine the end behavior, find the power function that the graph of f resembles for large values of |x| Find the maximum number of turning points

Functions of f(x)
Given the two functions f(x)and g(x)‚0 for all x, explain how to find (f+g)(x),(f-g)(x),(f*g)(x), and (f€g)(x).Demonstrate examples for all: f(x)=(-x)/(6)-3(5+3x)/(8)-3x f(0)=-15/8

statistics
38

statistics
38

Living Environment
having a hard time finding this information on google and i really need help for some questions. What are 3 abiotic factors that influence the: Highlands of Ethiopia Patagonia The Rockies Pakistan and the Himalayas Forests of Eastern China

Chemistry
I'm trying to figure out the formula for one liter of 1M K2HPO4 (Potassium Phosphate Dibasic). I know the amount of K2HPO4 is 174.18grams and you make it to equal one liter with dH2O, but I can't find where anyone has actually written the amount of dH2O to use. Without...

history
thanks really just trying to get my thesis statement straightened out its a very broad subject

history
how has "liberty and justice for all" changes from 1492 to 1865? may include race, class, religion, politics, gender, economics, culture

English
Casual Wear is popular with American teenagers for sure.

literature
summarize the major similarities and differences between the forms of drama, poetry, and the short story. Demonstrate your ideas with textual examples from the course readings. In your response, include at least one example of each literary form.

Science
Thank you, J-B-

Science
please delete my question

Science
how long does it take for one water molecule to complete the water cycle?

physics
A ball is thrown straight upward and then returns to the earth. choosing the positive direction to be upward, sketch a graph of the velocity of this ball against time. where does the velocity change direction? Explain?

physics
a rock is dropped from the top of diving platform into the swimming pool below. will the distance traveled by the rock in a 0.1 second interval near the top of the flights be the same as the distance covered in a 1.1 second interval just before it hits the water? Explain?

chemistry
when you add manganese dioxide to hydrogen peroxide does the temperature decrease or does it form a precipitate?

science
Can someone explain to me using a formula, why an increase in carbon dioxide makes the blood more acidic.

bio
the systemtic system of the heart sends oxygenated blood and nutrients to all body cells. If the questions were does it send oxygenated blood and nutrients to all body tissue would the answer be yes or no. cells make tissues so would it be yes?

english
Thank you for your help.

english
Where should the commas be placed in this sentence? Players came from places such as Red Hill Pennsylvania and Popular Point Manitoba Canada.

precalculus
the vertex of y^2 - 8y + 24 = x is... (9,3) (24,0) (8,4) (4,8) or none of these

precalculus
which conic section is this the equation for? 3x^2 - 9x + 2y^2 = 15

physics
It has been suggested that rotating cylinders about 12 mi long and 5.4 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth?

Algebra
Great explanation. I totally get it now. I think I can actually finish the rest. Thanks for your help!

Algebra
A total of 475 tickets were sold for the school play. There were 75 fewer student tickets sold than adult tickets. How many adult tickets were sold?

PreCalc (Just Can't Comprehend)
If P = 2x + 2y and xy=400, then the perimeter is P(x)=2x + 800/x. In a pre-calc course you could only be expected to find the minimum value of P(x) by inspection of a graph. See the "graph of p = 2x + 800/x from 0 to 40" at wolfram alpha. OR, by creativity ... The mi...

English
Calm Thank you for your help

English
What are the predicate adjectives in this sentence? The charmer must remain calm as the cobra flares its hood menacingly.

Language
Are these two sentences complete or incomplete? A large red fox with its young. A day sunbathing on the beach.

science
CellTheory

acrostic poems
ooo ya

Chemistry
Hi there. I'm doing a paper on Biology (yes I know, will explain the chem link in a sec) and in it am trying to find the best pH level for Slaters, using limewater and filtered water to change concentrations. I have done experiments and using bunch of ratios (eg 2 parts li...

social studies
Britain I believe

Physics EM
Physics2212 students... lets all protest against mastering physics.

Medical
It was discovered that a medical assistant discussed the medical condition of a high-profile individual in public. This resulted in the condition becoming publicized information. What were the influential factors in this situation for the medical assistant? Thanks in advanced JB

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