Total # Posts: 1,094

physics
A rotating platform is on a table and an object is on the platform. The platform has a diameter of 30.0cm and it has a string wrapped around it. The string is threaded over a pulley ( which is right next to the platform and attached to the edge of the table ) . The pulley also...

physics
A circular round disc that has a radius of 5cm and a mass of 32g is rotating with an angular velocity of w. A second disc with the same radius but with half of the mass is dropped onto the rotating disc . The two discs slide against eachother till they both have the same final...

physics
A pitcher can throw a ball towards the home plate at 120km per hour. When thrown, the ball curves. The curveball has a spin of 1250rpm. The ball has a mass of 100g and a radius of 2.5cm Calculate the percentage of total KE that is in rotational KE

physics
A car wheel has a moment of inertia of 0.35kg m^2. It takes 50 seconds to come to rest from the initial angular velocity of 45 rpm. Calculate the magnitude of the average friction torque

physics
A wheel has an initial speed of 100 radians/s. It is then slowed down with a magnitude of the constant angular acceleration of 6.0s^-2. To make it come to rest, how many revolutions does it need to make?

physics
A plane is in a steep downward plunge. To not crash, Captain Q pulls as much as he can. When the plane is at the lowest point of the plane's path the plane is in a circular arc of radius 450m. Captain Q experiences an acceleration of 5.0g ( so her weight feels like six ...

Physics
Two blocks lie on a triangle as shown in the figure. Block m has a mass of 5 kg and block P has a mass of 14 kg. Assume the inclines and pulleys are frictionless find the tension in the string. They lie with the string resting on the peak of a 110 degree obtuse triangle, each ...

Physics
A crate of mass 106 kg is pulled by a rope on a frictionless surface. The rope makes an angle of 40 0 above the horizontal. If the tension on the string is 1183 N, what is the acceleration of the crate?

Physics
A basketball player who is 2.00 m tall is standing on the floor 8 m from the basket. If he shoots the ball at a 390 angle with the horizontal, what initial speed must he shoot the ball so that it goes through the hoop without striking the blackboard. The basket height is 3.05 m.

Physics
incorrect, i found the correct answer to be 9.78

Physics
A basketball player who is 2.00 m tall is standing on the floor 8 m from the basket. If he shoots the ball at a 390 angle with the horizontal, what initial speed must he shoot the ball so that it goes through the hoop without striking the blackboard. The basket height is 3.05 m.

Physics
Scott you're a legend among men. anyone who reads this, be sure you double angle theta in sine, it took me a second to figure that out, but no worries Scott thank you so much!!!!

Physics
Juan throws a baseball with an initial speed of 40 m/s at an angle of 56 0 above the horizontal. Richard catches the ball at the same height that Juan threw it. How far did Juan throw the ball?

Physics
this isnt giving me the proper answer, although its only off by a miniscule amount, the answer is supposed to be 4.4776, im getting 4.3636363

Physics
A ball rolls without slipping at 5 m/s off an incline of 15 degrees. The ball falls off the incline and enters a hole 4 meters below the incline. What is the horizontal distance between the bottom of the incline and the the hole. I havent the foggiest how to start.

Physics
That did the trick! I see now, we're rolling in trig functions! math is not my strong point, thank you again Scott.

Physics
For safety reasons, park rangers decide to start an avalanche on a mountain slope. They fire an artillery shell at an angle of 430 above the horizontal with an initial speed of 284 m/s. Thirty seconds later they see the explosion. What is the x coordinates of the shell where ...

Physics
also, i have gotten this far, assuming that my teacher wants us to pursue this route, then what i have done is multiplie 2.3(t)*9.8(g) which would give me an initial velocity of JUST enough to travel for 2.3s before beginning the return is it really this simple??

Physics
A marble is flicked straight up. It takes 2.3 seconds to reach its maximum height. How long does it take it to return to its original height. Assume there is no air resistance totally lost. if i had velocity, or some other variable i would know what to do. all i know is travel...

Physics
to anyone who reads this post, my above formula did solve the problem correctly

Physics
so here is what i tried and it seems logical, i set my initial velocity to 14m/s, final velocity to 0m/s, and gravity as well, gravity lol, 9.8m/s! so doing so, am i able to square my velocity, and then divide it by 2*9.8? or vi^2/2(g)? and then i added the value i found to my...

Physics
and we havent studied energy either

Physics
what are you referring to as far as m? i just started classes a few days ago im sorry, this is a cram semester so we are moving fast. we havent discussed mass, i have studied average velocity, instantaneous velocity, acceleration, distance, and time

Physics
A baseball traveling upward passes a window 29.0 m above the street with a vertical speed of 14.0 m/s. If the ball was thrown from street level, what is the maximum height that the baseball reaches? Im stumped, please tell me what equations to use as well as what each variable...

physics
A baseball traveling upward passes a window 29.0 m above the street with a vertical speed of 14.0 m/s. If the ball was thrown from street level, what is the maximum height that the baseball reaches? im completely stumped, this is a cram semester and my professor is breifly ...

math
china population is 1.33 billion and continues to grow at the same rate,how many years until the population reaches 1.5 billion people?

Math
During a recent survey of two middle school classrooms, 1/3 of the students reported that they bring their lunch to school. Another 1/4 reported that they buy their lunch in the cafeteria and 1/6 reported going home for lunch. The remaining 18 students reported that they don&#...

Math - calc
Given that the graph of f(x) passes through the point (6,3) and that the slope of its tangent line at (x,f(x)) is 2x+6, what is f(5)?

Math
Okay so for weekly and daily, im not getting an answer

Math
A bank account was opened with a deposit of \$2750 at an APR of 3.5% compounded one of the following ways. Find the amount in this account after 6 years with compounding of: (round answers to nearest 100th) annually: \$ semi-annually: \$ quarterly: \$ monthly: \$ weekly: \$ daily...

math
okay so what do i do?

math
Zeb is going to deposit \$3370 into an account that earns 14% APR compounded annually for 37 weeks. What is the "n" in the compound interest formula? n= What is the "t" in the compound interest formula? Enter as a fraction. years What is the "nt" ...

Math
Mark put \$3290 into a bank that offered 3% interest rate compounded monthly. Mark kept the money in this account for 9 years and then moved all this money to a new account that offered 6% interest rate compounded weekly. Do not round any numbers until you get to an answer. How...

Writing
As an option, you could go to Prime-Writings service and ask them to proofread your paper or edit. In the result, you could be sure about its high quality. Lots of friends do that and I think that you would need also to check it out.

math
A car today costs \$32000. Assume that the average annual rate of growth per year was 5.83% over the last 45 years to answer the following question. Round all answers to the nearest whole dollar. How much would the same value of car have cost 45 years ago in 1969? \$ 1969's ...

Math
okay so when i put P= 1(1.00008.22)^365 in calculator it comes up as an error

Math
So is this the formula or the answer?

Math
A bank advertises a savings account that earns 3% APR compounded daily. What is the "n" become for the compound interest formula? What is the APY rate for this loan? Round answer to nearest 100th

Math -- Calculus
Some years from now you are working for a book publisher. Your boss asks you to give him a formula that will tell him the length and width of a book page that contains A square inches of printed text, a left margin of L inches, a right margin of R inches, a top margin of T ...

physics
Two Small sphere are given positive electrical change. When they are 40cm apart the repulsion force between them has magnitude 0.25N what the charge on each sphere if two changes are equal

Math
For traffic that flows on a highway, the headway is the average time between vehicles. On four-lane highways, the probability P (as a decimal) that the headway is at least t seconds when there are 500 vehicles per hour traveling one way is given is P = 0.87t Under these ...

Math
8x + 14y = 24 6x + 7y = 10 We are suppose to solve for x and y but I don't get the right answer

Chemistry
Assuming I have the following reaction: LiO2 + C +2 Mg -> LiC + 2MgO I'll be using 0.1 g of LiO2 to react with 1.2 mol C and 2.2 mol Mg in excess. How much C and Mg in grams do I need?

Calc
This summer Borice decides to put a rectangular swimming pool in his back yard. The material he uses for the border of the length of the pool costs \$10 per foot and the material he uses for the width costs \$5 per foot. He would like spend \$1,000 on the perimeter of the pool. ...

math
F(x,y) represents a velocity field of a fluid over a surface z=6-3x-2y.If the magnitude of the velocity in the direction of the unit normal vector,n on S is 3z/(surds14), compute the flux of F(x,y) over the surface S in the first octant oriented upward using the projection of ...

math
F(x,y) represents a velocity field of a fluid over a surface z=6-3x-2y.If the magnitude of the velocity in the direction of the unit normal vector,n on S is 3z/(surds14), compute the flux of F(x,y) over the surface S in the first octant oriented upward using the projection of ...

soil mechanic
In order to determine the average permeability of a bed of sand 12.5 m thick overlying an impermeable stratum, a well was sunk through the sand and a pumping test carried out. After some time the discharge was 850kg/min and the drawdowns in observation wells 15.2m and 30.4m ...

physics
A wooden box, with a mass of 22 kg, is pulled at a constant speed with a rope that makes an angle of 25° with the wooden floor. What is the tension in the rope?

pre calculus
Use the information to solve the triangle. If two solutions exist find both. 1.A=36°, B=98°, c=16 2.a=4, b=8, c=10 3.A=35°, b=8, c=12

Chemistry
h2po4(aq) + co34(aq) hco3 (aq) + hpo42 (aq)

homework
There are 13 fewer pigs than goats on the farm. There are 8 pigs. How many goats are there?

Calculus - fundamental theorems
d/dx integral e^t^2 dt from 1 to x^3 Please help. I think I'm supposed to use substitution for the x^3 and then apply the chain rule but I'm not sure how to do that.

English
I like the previous answer. By the way, if you do not mind, I copy for myself the structure of the essay . So, I will be sure what do to step by step. In case, it still will not work for you, you may actually go and get some help from the experts I like. Check Marvelous essay ...

Fluid Mechanic
3) Air at standard conditions enters the compressor shown in Fig. Q3 at a rate of 0.3m3/s. It leaves the tank through a 3 cm diameter pipe with a density of 1.8 kg/m3 and the uniform speed of 210 m/s. (a) Determine the rate (kg/s) at which the mass of air in the tank is ...

Math
What is the first common number among: palindromic numbers, Triangular numbers and Fibonacci numbers?

Social studies
The answer is b and I'm working on it right now laugh out loud are you a connections student?

Math
334/32 82x32 259.2

Math
259.0

Math
James earned 334 for working a 40- hour week. How much will he earn in a week in which he works only 32 hours? I got 294.0?

Chemistry 2
we make a solution of water and ethylene glycol c2h4(oh)2 which contains 24 g of the glycol for each 74 g of water. What is the boiling point of ethylene?

Chemistry
Calculate the value of Z and its absolute standard deviation. All standard deviations shown are absolute. Show your work and report the standard deviation in the result with two significant digits (to confirm the correct result). Z = (1.18+/-0.07)x((2.21+/-0.05)^3)

Chemistry
A student does a standard addition experiment by pipetting 25 mL of unknown, adding ferrous ion spikes and reagents, into a 100 mL volumetric flask and making up to the mark. The equation of the line has a slope of 0.103 and an intercept of 0.135 when the unit of concentration...

algebra

algebra
Write the polynomial in standard form. Then name the polynomial based on its degree and number of terms. 2 – 11x^2 – 8x + 6x^2 A. –5x^2 – 8x + 2; quadratic trinomial B. –5x^2 – 8x; quadratic binomial C. –6x^2 – 8x – 2; ...

algebra

algebra
I put 0 . We will see.

algebra
What is the degree of each monomial? -9 A. -8 B. 0 C. -10 D. 1

Counting Method
A company has 11 male and 10 female employees, and needs to nominate 2 men and 2 women for the company bowling team. How many different teams can be formed?

Math 😢😢😢😢😢 Help
Suppose a jar contains 5 red marbles and 33 blue marbles. If you reach in the jar and pull out 2 marbles at random, find the probability that both are red.

Compute Probability 😯😢
Compute the probability of randomly drawing five cards from a deck and getting 3 Aces and 2 Kings. (Give your answer as a fraction.)

Graph Theory
Must the Graphical Sequence Algorithm always give a connected graph? Assuming the sequence is graphical.

math
By your cell phone contract, you pay a monthly fee plus some money for each minute you use the phone during the month. In one month, you spent 200 minutes on the phone, and paid \$22.45. In another month, you spent 350 minutes on the phone, and paid \$29.65. Let x be the number ...

Math
25 minuets because Mandy can clean it faster but them working together wont make it faster.

Algebra
Consider the following system of equations. Solve and write as a coordinate point. 5x+4y=-14 3x+6y=6 Please help and thanks

Math
An automobile uses 8 gallons in traveling 120 miles at that rate how many gallons will be used in 360 miles?

Physics
If the sled in the the previous question weighs 530 newtons and the horse pulls it with a force of 140 newtons across level ground at a constant speed, what is the magnitude of the force of friction between the sled rails and the snow? Hide hint for Question 8 Hint 1: Remember...

chem
calculate volume of excess KOH(aq) and the volume of 6.00M H2SO4(aq) to neutralize it

chem 2
0.946g Al in 35 ml of 2.00M KOH and obtained 13.8g of dry alum. calculate the theorecital and actual yield %

physics
Runner A is initially 6.0 km west of a flagpole and is running with a constant velocity of 7.8 km/h due east. Runner B is initially 4.2 km east of the flagpole and is running with a constant velocity of 7.6 km/h due west. What will be the distance of the two runners from the ...

English
Last one just makeing sure Which of the following lines is an example of personification? A. “The weeping of the guitar / begins” B. “I am offering this poem to you” C. “He didn’t fight / he hadn’t fought at all” D. “My ...

English
To what does the speaker in “The Empty Dance Shoes” compare the energy of dance shoes at rest? A. “The Colossus” by Sylvia Plath B. A clown knocked down by a sandbag C. the music in the Stardust Ballroom D. a 98-pound weakling Is it B?

English
Thank you so much !

English
I think the both are..hmm so is the answer is D?? All of above?

English
I know it is not A.

English
Which of the following is an example of a narrative poem? A. The Bridegroom by Alexander Pushkin B. The Fish by Elizabeth Bishop C. Danny Deever by Rudyard Kipling D. All of the above

Chemistry
What causes a reaction to be spontaneous? Answer by answering each part a) (1 point) What is definition of spontaneous reaction?b) (1 point) What is Gibbs free energy?c) (1 point) How is Gibbs free energy related to a spontaneous reaction?d) (1 point) What is an example of a ...

Chemistry
The solubility product constant of Calcium hydroxide is 6.5 * 10^-6 . If 0.10 mo of sodium hydroxide is added to 1 L of 0.0001 M Ca(OH)2, what is the final concentration of the calcium ion? SHOW your work. Again, I have no idea where to start

Chemistry
A 45.0 g piece of copper wire is heated. And the temperature of the wire changes from 21.0 degrees C to 88.0 degrees C. The amount of heat absorbed is 280.6 cal. Find the specific heat of Copper. SHOW your work. Please help! I have no Idea where to start or what to do

Physics
Urgent. A density bottle weigh 0.25 when empty and 0. 75 when. Filled with water and 0.65N when filled with alcohol calculate the volume of water,the density of alcohol. Take density of water=1000kg/m3 acceleration due to gravity= 10m/s

Math 1324
A manufacturer produces two models of elliptical cross-training exercise machines. The times for assembling, finishing, and packaging model A are 3 hours, 3 hours, and 0.8 hour, respectively. The times for model B are 4 hours, 2.5 hours, and 0.4 hour. The total times available...

Language Arts
wet with dew straggly branches slapped and scratched at my legs and hid uneven ground so that several times tumbling and sliding downward which type of conflict best characterizes the event in the passage? a character vs self b character vs nature c character vs society d ...

Chemistry
The nitric acid was purchased as a solution that has 70% HNO3. That volume (mL) of this solution is necessary for preparing 250 mL Solution 2.0 mol L-1? The density of HNO3 (aq) 70% is 1.42 g cm-3

Chemistry
How many grams of sucrose will be necessary to prepare 300 ml of a 5% solution of sucrose (342.0 g/mol)

Math
A bowl has red,green and blue marbles.There are 95 red marbles.the nuber of blue marbles is 5 timesthe number of green mables altogether red and green marbles are 189 less then blue marbles .how may marbles are there in total

Calculus
An object's velocity after t seconds is v(t)= 38-2t feet per second. a. How many seconds does it take for the object to come to a stop (velocity = 0)? b. How far does the car travel during that time? c. How many seconds does it take the car to travel half the distance in ...

Chemistry
What mass of CaO, can get by the decomposition of 250 g of CaCo3 with 80% purity?

Chemistry
You get poo and put in poo

Algebra
5, 12, 13

Nuclear
Per GWe-year, a 3700 MWt Sodium Fast Reactor produces 558 kg and consumes 789 kg of fissile plutonium in the core while producing 455 kg and consumes 34 kg of fissile plutonium in the reflector (breeding blanket). Assume 200 MeV per fission and a capture-to-fission ratio of 0....

Physics
someone swings a bucket of water in a vertical circle. Describe the water's motion to another person? or How would you? & also how to explain the motion of the water to them? How come the water didn't fall on the persons head?

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