# Posts by Rey

Total # Posts: 34

Physics
A block of mass 2 kg  attached to a spring lies on a flat surface.    When the block is pulled 5 cm to the right a force with a magnitude of 300 N is need to hold it in place.  What is the work done by the spring when the block moves from x = 10 cm to ...

Math
1.76g of sodium hydroxide was added to 50cm^3 of 0.025mol.l^-1 nitric acid. Calculate the pH of the resulting solution.

math
it takes 3 mins to fill a water tank using pipe A and 5 mins to fill the same tank using pipe b alone how long will it take to fill the water if pipes a and b are used together, in minutes and seconds?

Science
What is a real-world example for biochemical conversion?

chem
500-g of hg (density=13.55-g/ml) poured into a 100-ml graduated cylinder, how much water would have to be added to fill the cylinder up to 100-ml mark?

earth science
A heterogeneous mixture is a

Statistics Help !!
Are my answers here correct ? Research questions for z test, t test for independent samples and t test for dependent samples : z test: "An investigator is interested in finding out whether the particular sample of college students is similar to or different from college ...

Statistics
Post a null hypothesis that would use a t test statistical analysis.. Use the same hypothetical situation taken in the t test hypothesis, and turn it into a null hypothesis using a one-way ANOVA analysis and a two-way ANOVA.

Psychology
Thanks :)) I appreciate for the help.

Psychology
Why is determining abnormal behavior or a mental disorder so difficult? In 2 paragraphs please . :)) Thank you :)

Statistics
1. If the mean is 40 in a normal distribution, what is the median?

physics
You place a box weighing 286.3 N on an in- clined plane that makes a 45 angle with the horizontal. Compute the component of the gravita- tional force acting down the inclined plane.

economics
You have been hired by a local used car dealer to help in their pricing of used cars. (Hey, it’s temporary thing, just to help you earn some extra cash.) They want to know whether the prices of the cars they sell are more influenced by the age of the car or by the mileage...

Economics
Brian is taking three courses this semester: economics, statistics, and finance. He has decided to spend 19 hours per week studying (in addition to attending all his classes) and his objective is to maximize his average grade, which means maximizing the total of his grades in ...

Discrete Math
so i have this description: S consists of all strings of a's, b's and c's where an increasing number of a's come before an increasing number of b's and c's or c's and b's. does this make sense for this recursive definition of the set S over {a,b...

physics
A uniform rigid pole of length L and mass M is to be supported from a vertical wall in a horizontal position, as shown in the figure. The pole is not attached directly to the wall, so the coefficient of static friction, μs, between the wall and the pole provides the only ...

geometry
point T bisects segment UV. find UV if UT=4.5

Permutation
In how many ways can 5 boys and 5 girls be seated around a table so that no 2 boys are adjacent?

math
which set of dimensions would produce a right triangle?

math
40

math
if the employee is fulltime at \$9.50hr (plus 20% for benefits) and works one hour of overtime at 1.5 salary, what would the cost be for one week?

Calculus
According to Kleiber's Law, the metabolic rate P (in kilocalories per day) and body mass m (in kilograms) of an animal are related by a three-quarter power law given below. Estimate the increase in metabolic rate when body mass increases from 65 to 66 kg. (Round your ...

Chemistry
I think its 9.04 x 10 to -12 J.

Math
i gave the second answer

Physics

Social Studies

look in your school libary there is alot of non fiction books there

algebra
y=x-2

Probability
This is a lottery odds question. It involves the Mega Millions, where 5 numbers are selected from the intergers 1-56 (without replacement) then a special 6th ball is selected from a new set of intergers 1-46. The odds of winning are 1/175711536. If exactly 200,000,000 random ...

calculus
I'm sorry that my post is confusing what I meant was Ke^(sqrt t) It's a hand written assignment so it's hard for me to type it.

calculus
yes sorry, it's Ke^t^(1/2)

calculus
I have the following problem on a takehome assignment and am stuck. A particular stock has value V(t) at time t where V(t)=Ke^(1/2) where K>0. Assume that alternative investments grow in value to e^(rt). Calculate the instantaneous rate of change in the value of the stock. ...

College Algebra
Simplify the expression: (6ax4)^2(2x)^-2 I will be happy to critique your work or thinking on this. I will be happy to critique your work or thinking on this. Note that this is like a fraction with (2x)^2 in the denominator and (6ax^4)^2 in the numerator. You will get some ...

Physics