Friday
August 1, 2014

Posts by HELP


Total # Posts: 906

physics
A sprinter has a mass of 82.0 kg. If the sprinter is running at a speed of 22.5 km/h, determine his kinetic energy. __________ × 103 J.

physics
A 130.0 g object is moved from a shelf 0.2 m high to one that is 5.0 m high. The change in potential energy for the object is __________ .

physics
A hockey player lifts a 600 g trophy up into the air a distance of 75.0 cm. The work done against gravity on the trophy is __________ J.

physics
When an object travelling at 12.7 m/s [E] speeds up to a velocity of 21.5 m/s [E] in 3.45 s, the magnitude of the acceleration is __________m/s2.

Life sciences
So no one can take it/Security. They're pretty rare. Is this supposed to be written in a paragraph though?

Mathh
Thanks alot.

Mathh
After Michael 110 baseball cards to Sally and 75 to Heidi, he still has 315 left. What percent of his cards did Michael give away? 110 + 75... and then??

Math
No. 500% is right. I tried it on my online homework. Thanks :)

Math
Umm, isn't it 5000? :)

Math
Thank you

Math
If the investment rises from $1000 to $5000, the percent is what from the original?

science
A mass m=5.2 kg is attached to the end of a spring with a spring constant of k=15.6 N/m. The mass moves through a viscous damping medium with a damping constant b=1.8 kg/s giving a velocity dependent damping force Fdamp= -bv. The motion occurs in zero gravity so set the force ...

statistics
M&M’s The candy company claims that 10% of the M&M’s it produces are green. Suppose the candies are packed at random into small bags containing about 25 M&M’s per bag. A class of elementary students learning about percentages opens several bags, counts the vario...

USA Colonists History
thx, but what about the land?

USA Colonists History
i think that 1. They could trade the things they dig, find and then sell it. 2. They could make materials from the trees they find, etc., and sell them.

Math
James takes a ruler and measures the width of the piece of paper. He find that the actual width is 48.8 cm. Find the width of each strip.

math
A new cruise ship line has just launched 3 new ships: the Pacific, the Caribbean, and the Mediterranean. The Caribbean has 32 more rooms then the Pacific. The Mediterranean has 38 fewer rooms than FOUR times the number of rooms on the Pacific. Find the number of rooms for each...

English
> rain's <

math
thanks

math
the value is 56 my bad

math
The value of an uncirculated mint state-65 1950 jefferson nickle minted in denver is 4/3 the value a 1945 nickle minted in philadelphia is similar condition. together the total value of the two coins is $21.00

calculus
Consider the motion of a particle of mass m falling vertically under the earth’s gravitational field, and suppose the downward motion is opposed by a frictional force p(v) dependent on the velocity v(t) of the particle. Then the velocity satisfies the equation mv0(t) = &#...

Math
Please can someone help?

networks
what method can be used to reduce packet jitter

networks
Sorry but what causes packet jitter

alg.
Solve. (If there is no solution, enter NO SOLUTION.) y= x^2-x-4 y=x+4 (x, y) = ( , ) (smaller x-value) (x, y) = ( , ) (larger x-value) x^2 + y^2 =10 x+y=4 (x,y)= ( , ) smaller value (x,y)= ( , ) larger value

Accounting
Target Company issues bonds with a par value of $900,000 on their stated issue date. The bonds mature in 10 years and pay 10% annual interest in semiannual payments. On the issue date, the annual market rate for the bonds is 12%. What is the selling price of the bond

school
give me the answer!

physics
Eva is in a closed, dark room. She uses her arm muscles to turn on a lamp. When she moves her hand closer to the lamp, the light heats her hand. The light bounces off the pages of a book and into her eyes. If this room is a closed system, what happens to the total amount of e...

urgent (physics)
A 2 kg brick falls at 5.1 m/s from a height of 6 m above a spring that has a spring constant of 47 N/m. The brick strikes and compresses the spring until it stops moving. Ignore friction effects. How much is the spring compressed by the brick? Assume that there is no Eg after ...

Physics
A 2 kg block has an initial velocity of 16 m/s at the bottom of the ramp (see diagram below). The coefficient of kinetic friction between the block and the ramp is 0.1. The spring has length 3 m and has a spring constant of 100 N/m. What maximum compression will the spring exp...

Alegbra 1
Explain why any two regular n-sided polygons would be considered to be similar and how knowing this information could help in solving real-world problems.

Math
what is a measurement that is not equal to 8 cups?

Biology
Which of the following is correctly matched with its tissue system? cortex/dermal tissue system cuticle/vascular tissue system phloem/dermal tissue system stele/vascular tissue system>>>> my choosen answer

math
17.Given that 3•2 = 9, 2•6 = 64, 1•7 = 1 and 4•4 = 256. What is the value of 10•5? A)50 B)100 000 C)5000 D)5 plz explain how you get this answer i am studying the sample questions for the math olympics tommorow so i need to know what they will be like.

physics
A missile is launched at an angle of 25 degrees to the ground. It hits a target at 301.5 meters from the point of launch. find the initial velocity

Physics
A 14g bullet is traveling at 306m/s when it strikes a block of wood. If the block of wood exerts a force of 50,000 N opposing the motion of the bullet, how far will the bullet penetrate the block of wood?

Chemistry
Calculate the Ph and POH of an aqueous soltuion that is 0.500 M in HCl(aq) and 0.085 M in HBr (aq) at 25 degrees C.

Physics
A 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules

still need help on this one
...

Physics
A 2473 kg elephant is walking at 3 m/s on a flat surface. How much kinetic energy does he have? Answer in Joules or J

Math
Identify the zeros, vertex and axis of symmetry of y=-1/3(x+7)(x+1)

Physics
A 254kg box is pulled at a constant speed by the little engine. The box moves a distance of 3.0 m across the horizontal surface. (μ=.20) How much energy is transferred by the engine? (How much WORK is done?) what is the answer in joules?

Physics
The above spring has a spring constant of 29 N/m. The μ between the box and the surface is 0.3. The box has a mass of 1 kg. What is the maximum distance that the spring can be stretched from equilibrium before the box begins to slide back?

Chem
S2 + C ----> CS2 How many grams of CS2 can be prepared by heating 11.0 moles of S2 with excess carbon in 5.20 L reaction vessel held at 900 kelvin until equilibrium is attained? Kc= 9.40

science
Can scientists use radiocarbon dating to find the age of a very tall, old redwood tree living in an old growth forest? Explain your answer.

Chemistry
sorry, didnt mean to post twice lol computer glitched XD

Chemistry
Answer the following questions about the characteristics of the elements in Group 2 (the alkaline earths). How do they react with iodine? How do they react with water? How do they react with oxygen? Which reacts the most vigorously? Which element in the group is the most metal...

Statistics
What I mean by a "running number" is that the average is always changing. If I turn in 10 homework assignments and the grades are as follows: 58, 87, 99, 90, 92, 95, 89, 90, 95, 91 then my average is 88.6. If I turn in 10 more assignments my average changes, we don&#...

statistics
when will I know it is time to calculate the mean? Is the mean a running number?

statistics
do we need to calculate z in order to use the critical value like we did when we calculated the p value?

Hypothesis test
Please explain the solution to this problem. Individuals filing federal income tax returns prior to March 31 received an average refund of $1056. Consider the population of "last-minute" filers who mail their tax return during the last five days of the income tax per...

Geometry Proofs (w/Pic)
If PQRS is a rectangle and M is the midpoint of RS, prove PM is congruent to QM. P----------------Q |\ /| | \ / | | \ / | | \ / | | \ / | R--------M-------S *be as explanatory as possible

Math
The number of peaches, p, is three less than half the number of grapes, g. Which expression represents the number of peaches in terms of the number of grapes?

English
I think d because a broadcaster uses a microphone

English
Oh ok I understand now so I would say 1.a 2.a 3.c

English
Select the letter of the pair of words that expresses a relationship expressed by the following pair 1.Stethoscope:doctor a.manager: trainee b.best-seller: publisher c.tool:shovel d.microphone:broadcaster 2.cubism:art a.dictatorship:government b.suit:vest c.bravery:fear d.mode...

English
Thanks for your help

English
1.a 2.d 3.d

English
Select the letter of the pair of words that expresses a relationship expressed by the following pair 1.Stethoscope:doctor a.manager: trainee b.best-seller: publisher c.tool:shovel d.microphone:broadcaster 2.cubism:art a.dictatorship:government b.suit:vest c.bravery:fear d.mode...

Statistics
Of the parts produced by a particular machine, 1.5% are defective. If a random sample of 11 parts produced by this machine contains 2 or more defective parts, the machine is shut down for repairs. Find the probability that the machine will be shut down for repairs based on thi...

Statistics
paired test hard

math
The Robinson come from three states of the country. 6 of them come from Minnesota. The rest come from Texas and Florida. There are 5 more family members from Texas than from Florida .how many Robinson comes from each state?

math
The Robinson come from three states of the country. 6 of them come from Minnesota. The rest come from Texas and Florida. There are 5 more family members from Texas than from Florida .how many Robinson comes from each state?

math
The Robinson come from three states of the country. 6 of them come from Minnesota. The rest come from Texas and Florida. There are 5 more family members from Texas than from Florida .how many Robinson comes from each state?

math
The Robinson come from three states of the country. 6 of them come from Minnesota. The rest come from Texas and Florida. There are 5 more family members from Texas than from Florida .how many Robinson comes from each state?

Science - The Sun
What is the true thickness of each of the sun's layers (core, radiation zone, convection zone, photosphere, chromosphere, and corona)? What is the age, composition, average density, period of rotation, distance from Earth, and source of energy from the sun?

Math
0.04m + F = 12

physics
How much power must you exert to horizontally drag a 21.0kg table 15.0m across a brick floor in 20.0s at constant velocity, assuming the coefficient of kinetic friction between the table and floor is 0.500?

physics
A pump lifts 200kg of water per hour a height of 6.0m . Part A What is the minimum necessary power output rating of the water pump in watts? Part B What is the minimum necessary power output rating of the water pump in horsepower?

physics
Two workhorses tow a barge along a straight canal. Each horse exerts a constant force of magnitude F, and the tow ropes make an angle θ with the direction of motion of the horses and the barge. (Figure 1) Each horse is traveling at a constant speed v. How much work W is d...

physics
You are a member of an alpine rescue team and must get a box of supplies, with mass 3.00kg , up an incline of constant slope angle 30.0∘ so that it reaches a stranded skier who is a vertical distance 2.90m above the bottom of the incline. There is some friction present; ...

stats
An investment broker reports that the yearly returns on common stocks are approximately normally distributed with a mean return of 12.4 percent and a standard deviation of 20.6 percent. On the other hand, the firm reports that the yearly returns on tax-free municipal bonds ar...

health
what are some mental or emotional problems i can research

algebra
9. 9/5w + 8/w ** Cannot be simplified. Am I correct?? 14. The number of instrctions N performed per second by a computer varies directly as the speed S of the computer's internal processor. A processor with a speed of 20 megahertz an perform 1,800,000 instructions per seco...

Quantum physics
Leave it.. Its not good to discuss exam questions outside. I don't know how i reached here.. i just realized i don't need course certificate, if I'm not worth it. So, I will try to solve it myself. You do too.. :)

Quantum physics
6 then I will help with 5, 9 and 12

Quantum physics
Help for Q. No 6

Algebra 1 parabola's
I have a graph with a parabola on it and asked to write the function for f(x) in standard form. I know that standard is y=ax^2+bx+c obviously, since the points are on the graph we know x and y so a,b and c need to be found. The vertex is on (4,-4) the points on the left side o...

Science/Biology
Please help answer!

hca 415
I am just not understanding that question, I think I am just making it harder than it is asking.

hca 415
What major forces are most likely to fuel further movement toward major health care reform in the Unites States?

hca 415
U.S. Health Care System Critical Issues The size, scope, and complexity of the U.S. health system makes it difficult to deliver quality care to all of its citizens. What do you believe are the three most critical issues facing the health care system in the United States today?...

Statistic
9 1 10 4 11 1 13 1

Statistic
9 1 10 4 11 1 13 1

science
Thanks to stat001,

Business
Discuss the quality of the disclosures for guartantees and commitments. could these disclosures be improved?

Statistics
Thanks, Walter DE

math
Solve each equation by factoring v(squared) - 10v + 21 = 0

physics
What is the final position of a mosquito that flies from an initial position of 20 cm in 20 seconds at -0.5 m/s?

MIT 2.01X
8.1 8.2 8.3 8.4 please

Pre-cal
find all solutions of equation in [0, 2pi) 2 (sec x)^2 + (tan x)^2 -3 = 0

English
how do Huck and Jim feel about the sanctuary of the raft and how do they feel about the violence and shame of the shore? I have to make a collage on this and I don't really know what to put. I was thinking of drawing a river and in the inside of the river would be a drawin...

math
How many ways can the integers 1,1,2,3,4,5,6 be arranged in a row, so that no integer is immediately adjacent to two strictly larger integers? NOTE: The sequence 3,1,2,4,5,6,1 is not valid as 1 is adjacent to 2 and 3, both of which are strictly larger than 1. The sequence 3,1,...

Econ 112
A researcher believes that the average size of farms in the U.S. has increased from the 2002 mean of 471 acres. She took a sample of 23 farms in 2011 to test her belief and found a sample mean of 498.8 acres and a sample standard deviation of 46.9 acres. At a 5% levelof signi...

physics
In the movie Spiderman 2, there's a famous minute long scene where Spiderman stops a train. If the initial speed of a five car out of control subway train was around the top speed of the NYC subway (27 m/s), and Spiderman stopped the train in exactly one minute, then what ...

Math
Not sure how to ask my question? Need help on writing a formula for trapezoid A=h(B=+b) ____ 2 without parentheses and multiplication. Hope this makes sense. If it could be explained that would be great.

algebra
How long will the ball be in the air until it lands on the ground when h=-4.9t+28t+3.2 quadratics

PhySics
Using several bags filled with different amounts of the same item, take the mass of each and develop a procedure to determine the mass of a single item. (modelling milikan's oil drop experiment)

physics
I need help devloping a procedure: Using several bags filled with different amounts of the same item, take the mass of each and develop (and enact) a procedure to determine the mass of a single item....This procedure is supposed to model Milikans oil drop experiement.

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