Thursday
July 31, 2014

Posts by roger


Total # Posts: 242

physics
a stone is projected upward with a speed of 80.0ft/s from a 224 ft tower. find the maximum height and the speed at which it strikes the ground.

physics
a rock is thrown vertically down from a bridge with an initial velocity of 30m/s and strikes the water in 2.0sec. find the velocity with which the rock strikes and the height of the bridge.

physics
a stone is thrown straight upward and rises to a maximum vertical height of 40.0m. with what velocity was it thrown and how long does it take for the stone to return to the initial level from which it was thrown?

physics
a steel ball dropped from a tower strikes the ground in 3.0 seconds. Find the velocity with which the ball strikes the ground and the height of the tower in meters.

physics
at the start of a race , a horse accelerates out of the gate at a rate of 3.00m/s squared. how long does it take the horse to cover the first 25.0m of the race?

physics
on a trip a car covers 42.3 miles in 40.0 minutes. find the average velocity in m/s and km/hr

physics
A boy on a motor scooter is traveling at a velocity of 14.1 m/s when he applies his brakes in order to stop. How much time will it take him to stop if he slows down at a rate of 3.2 m/s2?

physics
A motorist is driving at a constant velocity of 28 m/s when he decides to pass a car that is in front of him. He accelerates at a rate of 2.5 m/s2 for 3.0 seconds while passing the car. What is his velocity at the end of the 3.0 seconds?

Chemistry
Please help me solve this empirical formula.Im so confused C=58.5% H=4.1% N=11.4% and O=26.0% Thank you so much

physics
An infinitely long thin metal strip of width w=12cm carries a current of I=10A that is uniformly distributed across its cross section. What is the magnetic field at point P a distance a=3cm above the center of the strip as shown? This one requires some integration! I suggest y...

physics
A series RLC circuit is made with a C=100pF capacitor, an L=100μH inductor, and an R=30Ω resistor. The circuit is driven at 5×106rad/s with a 1V amplitude. What is the current oscillation amplitude in amps

physics
A series RLC circuit is made with a C=100pF capacitor, an L=100μH inductor, and an R=30Ω resistor. The circuit is driven at 5×106rad/s with a 1V amplitude. What is the current oscillation amplitude in amps

physics
Consider a coaxial cable with 2Amps in the center conductor coming out of the page, and 1Amp in the outer conductor going into the page. The center conductor has a radius of 1mm, the outer conductor's inner radius is 2mm, and the outer conductor's outter radius is 3mm....

statistics
Suppose the average body temp is 98.6 assume the variable is normally distributed with a standard deviation of .74 degrees. suppose a sample of 100 is taken. what is the probability that the mean is below 98.4??? Between 98.5 AND 98.7??

statistics
the average act score submitted to a certain university is 26. to be eligible for admission, a student must score in the top 6% of applicants. if the scores are normally distributed with a standard deviation of 2.4, what is the minimum score needed to be considered for admission?

Physics
A baggage cart full of luggage is coasting at a speed vA across the airport taxiway. When eighteen percent of the mass of the cart and luggage is thrown off the cart, parallel to the ground and in the forward direction, the cart is brought to a halt. If the direction in which ...

Physics
A hailstone traveling with a velocity of 43 meters/second comes to a virtual stop 0.28 seconds after hitting water. What is the magnitude of its acceleration in the water?

English
I e-mailed him yesterday. This is the correct answer.

math
can some one tell me the simplified cube radical form of (64x^5y^7)^1/3

Physics
Automobile Airbags. The human body can survive an acceleration trauma incident (sudden stop) if the magnitude of the acceleration is less than 250 m/s2. If you are in an automobile accident with an initial speed of 60 km/h (37 mi/h) and you are stopped by an airbag that inflat...

Social studies
In which colony were people most likely to make their living by fishing. A. New Hampshire B. North Carolina C. Pennsylvania D. Massachusetts E. Virginia I put d am I correct

Mathis
I am sooty I made a mistake with the question it is 187 not 186 and I still don't understand where you get 7 and 9 from

Mathis
Fiona is dissatisfied with her current weekly salary. If she received a raise of $0.50 per hour and worked an additional 4 hours each week her weekly salary would then be $500. What is Fiona current salary a) $380 b)$400 c)$420 d)440 e) not e ought information I put d can you ...

Physics
Wrong answer

pyhsic question for count iblis
ibis ,I beg to differ,the door slowly open because the ball bounces back elastically,please don't be certain,when u are wrong

Science
6.58

Science
6.58

Science
6.58

Science
6.58

Science
6.58

Physics help
20

Physics help
20

Physics help
20

Physics help
20

Physics
26.5

math
alicie plans to use a square iece of plywood forthe tabletop. She wants to put tiles on each outside edge of th taletop Each tile measures 2 inche by 2 inches of each outside edge of teh tableop

science
According to Newton's second law of motion, _____? A. F = mv B. F = m/a C. a = Fnet /m D. F = ma I think it is B..?

economics?
If you were president, would you be more interested in your economic advisors' positive views or their normative views ? Why ?

Math
3 times the square root of 4/9

not sure where to begin
In what ways is your standard of living different from that of your parents or grandparents when they were your age? Why have these changes occurred ?

pre alger
Suppose that a car normally sells for $16,500 and is now on sale for $14,000. What is the percent of discount? If necessary, round your answer to the nearest tenth.

biology
Think of diets from an energy perspective. Where is the energy coming from, and how many organisms does it move through before it gets to the human? In what form is most of the energy in when it gets to the human, and how is that energy unleashed by the body?

biology
Apply the Law of Conservation of Energy to food. Trace the energy from its beginning point, to the point where it was stored or used.

biology
Apply the concept of RESPIRATION. What happens inside of a human being when he or she eats various foods? During Respiration, is the energy in the food converted into heat, or into some other chemical (name the chemical!)

aCCOUTNING
explain how improperly counting ending inventory affects the income statement and the balance sheet

biology
Can a snail survive in an aquarium with no living plants in it? What do fish owners do to compensate if their aquarium has no plants?

biology
oh, a snail and Elodea

biology
27. Pretend you are a carbon atom that was part of a molecule of CO2 dissolved in the water at the beginning of the experiment. Describe a path you could take through both organisms in this experiment, including the molecules you would be a part of and the chemical reactions y...

biology
People with a lactose intolerance are able to take products such as Lactaid that contain the lactase enzyme with their meals. These products can be taken in pill form. Considering the fact that the pill form of the enzyme would have to travel through the person's stomach, ...

biology
substrate concentration and pH affect enzyme activity. Is there another environmental condition you think could affect enzyme activity How would you test your hypothesis?

biology
30. Enzymes function most efficiently at the temperature of a typical cell, which is 37 degrees Celsius. Increases or decreases in temperature can significantly lower the reaction rate. What does this suggest about the importance of temperature-regulating mechanisms in organis...

economics
data collected in the imaginary economy of karabekiar reveals that when price of bork increased by 20%, the quantity of bork sold decreased by 15% and the quantity of perf demanded decreased by 10% what is the cross-price elasticity of demand between perf and bork?

math--please check
Change the logarithmic equation to an equivalent equation involving an exponent. log8^64=2 **note that the 8 should be lower than the g** 8^(log64)=8^2 64=8^2 is this correct

math/calculus
solve the equation loga(x-5)- loga (x+9)=loga(x-7)-loga(x+9) all a's are lower please show work

math
solve the following exponential equation e^x-4=-e^-x please show work

math/calculus
The function f is defined as follows: f(x)={x+6 if -5 less than or equal to x<1 f(x)={9 if x=1 f(x)={-x+5 if x>1 a. find the domain b. locate any intercepts, if any

Chemistry
"You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 165.0 ppm and is initially uniform through the thickness of the steel. The atmosph...

Physics
1. If a bar magnet is broken into two pieces, how many magnetic poles are there? 2. A long straight wire carries a current in the direction shown in the following figure. At the point labeled A, is the direction of the magnetic field left, right, up. Down, into the page, or ou...

Chemistry
Given 1.01 g of H2 in the reaction H2 + 1/2 O2 = H2O. The Delta H for solution is 143 kJ. What is the delta H for the reaction?

math
A box with a square base and no top is to be made from a square piece of cardboard by cutting 4-in. squares from each corner and folding up the sides, as shown in the figure. The box is to hold 196 in3. How big a piece of cardboard is needed?

math
A wire 320 in. long is cut into two pieces. One piece is formed into a square and the other into a circle. If the two figures have the same area, what are the lengths of the two pieces of wire (to the nearest tenth of an inch)?

math
Two fishing boats depart a harbor at the same time, one traveling east, the other south. The eastbound boat travels at a speed 1 mi/h faster than the southbound boat. After nine hours the boats are x = 45 mi apart. Find the speed of the southbound boat.

math
Wendy took a trip from city A to city B, a distance of 560 mi. She traveled part of the way by bus, which arrived at the train station just in time for Wendy to complete her journey by train. The bus averaged 40 mi/h, and the train averaged 110 mi/h. The entire trip took 10 1 ...

physics
A small mailbag is released from a helicopter that is descending steadily at 1.01 m/s. (a) After 4.00 s, what is the speed of the mailbag? v = m/s (b) How far is it below the helicopter? d = m (c) What are your answers to parts (a) and (b) if the helicopter is rising steadily ...

physics
A ball is thrown vertically upward with a speed of 19.0 m/s. (a) How high does it rise? m (b) How long does it take to reach its highest point? s (c) How long does the ball take to hit the ground after it reaches its highest point? s (d) What is its velocity when it returns to...

physics
An object moves with constant acceleration 3.65 m/s2 and over a time interval reaches a final velocity of 10.4 m/s. (a) If its initial velocity is 5.2 m/s, what is its displacement during the time interval? m (b) What is the distance it travels during this interval? m (c) If i...

physics
Runner A is initially 9.0 mi west of a flagpole and is running with a constant velocity of 2.0 mi/h due east. Runner B is initially 5.0 mi east of the flagpole and is running with a constant velocity of 5.0 mi/h due west. How far are the runners from the flagpole when they meet?

physics
A car traveling east at 42.4 m/s passes a trooper hiding at the roadside. The driver uniformly reduces his speed to 25.0 m/s in 4.00 s. (a) What is the magnitude and direction of the car's acceleration as it slows down?

Algr.1
x=12

chemistry
diffination of saturated?

Physics
A 2.00kg mass is hanging on a vertical compressed spring 1.0 m above the floor.The spring constant is 75N/m and the spring is compressed 0.90m. The mass is released so that it falls vertically.Determine 1) The acceleration of the mass when it was dropped. 2) The speed of the s...

physics
A 20000 kg satellite is launched from the surface of saturn and put into orbit.The satellite is launched at the speed of 27.5 x 10^3 m/s. a)calculte the satellite's total energy. b)Its orbital radius c)If the satellite was shot straight up at the same speed, find its maxim...

Information Technology 130 Programming Concepts
True or False Indicate whether the following statements are true or false. 1. T F: You cannot break up a word with the line-continuation character.

Information Technology 130 Programming Concepts
Thank you Steve I really appreciate your help.

Information Technology 130 Programming Concepts
Review Questions and Excercises Fill-in-the-Blank 1. A(n) _________ is information that is being passed to a function.

world history
with regards to the mining and agriculture industry,in the nineteenth century,whichof the following statement is false?

Intermediate Algebra
Create a list of six questions on solving equations with absolute value symbols that I will try to research, address, discuss, and/or express? Example: Google Earth: The Google Earth image shows the western side of The Mall in Washington D.C. The distance between the Lincoln M...

Intermediate Algebra
Create a list of six questions on solving equations with absolute value symbols that I will try to research, address, discuss, and/or express with my method?

Intermediate Algebra
Thank you Visoth I really appreciate your help.

Intermediate Algebra
Find the Absolute Value by solving this algebraic-equation? x-1/3=1/2x+1/6

Intermediate Algebra
Use the definition of absolute value to solve the following equation. x-1/3=1/2x+1/6

chemistry
Earl N. Meyer found that it took 26.54 mL of a 0.0100 M KOH solution to reach the equivalence point for the titration of 25.00 mL of HCl. What is the molarity of the HCl?

chemistry
If 2.0 mL of 0.80M copper (II) sulfate and 8.0 mL of water are mixed, what is the concentration of the resulting solution?

Physics
A place kicker must kick a football from a point 25.5 m from the goal, and must clear a crossbar that is 3 m off the ground. When kicked the ball leaves the ground with a speed of 21.9 m/s at an angle of 54o to the horizontal. By how much does the ball clear the crossbar?

Accounting
Last year, Jasper Company earned operating income of $139,600 with a contribution margin ratio of 0.3. Actual revenue was $237,000. Calculate the total fixed cost. Round your answer to the nearest dollar.

chemistry
Sarah needs to replace part of the metal railing on her deck and wants the new railing to match the existing railing. However, she does not know what metal the railing is made from. Which is a property that she can use to identify the metal?

math
How much would $4,800.00 compounded daily at 1.7% be after 6months?

math
what would $5000 compounded daily at 1.5% be after 1 year

s.s
with regards to the mining and agriculture industry,in the nineteenth century,whichof the following statement is false?

chemical question
a) Sour milk pancakes do not taste sour when sour milk and baking soda are substituted for sweet milk and baking powder . Explain. b) How would these pancakes taste if sour milk and baking powder are used? c) How would they taste if sweet milk and baking soda are used? thank f...

calculus
WHY ARE YOU DELETING MY POSTS?

calculus
Suppose the function G(t) represents a test grade (out of 100 points) as a function of hours studied. If G(t)=-0.046t^3+0.915t^2+38.005 points, what is (dG/dt)when t=4? Round your answer to the nearest point per hour. a. 50 points per hour b. 3 points per hour c. 5 points per ...

calculus
Determine the following limit. lim (1/x-3) x->3

calculus
Find the points of discontinuity on [-3,5] for the function f(x)=[[x-1]], where the double bracket indicates the greatest integer function.

calculus
Describe the interval(s)on which the function f(x)=(x-11/x^2-121) is continuous.

calculus
Find the derivative of the given function. Simplify and express the answer using positive exponents only. y= ((9x^2-4)^3/7x^2+4)

calculus
not sure if i understand you when you say from the left and right?

calculus
Find lim f(x) for f(x)=Ix-3I/x-3 x->3

calculus
ok, thanks.

calculus
Is it undefined or just 0.00?

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