Total # Posts: 917
Cellist Yo-Yo Ma plays a note at 250 Hz. A studio technician performs an analysis of the frequency spectrum and reports that she measured the SIL of its peaks (those of the frequency spectrum): 63 dB at 250 Hz, 58 dB at 500 Hz, 56 dB at 750 Hz, and 51 dB at 1000 Hz. Assuming ...
September 22, 2016
Moss and Roy both decide to go out for a 2 course dinner. Moss' meal cost twice as much as Roy's meal, however Roy spent $3 more than Moss for his dessert. Moss spent $11 on his desert. The bill came to $75. How much did Roy spend for his meal and dessert?
August 7, 2016
A projectile is launched from a platform 10 feet high with an initial velocity of 72 feet per second, The height h of the projectile at t seconds after launch is given by h = 16t2 + 72t + 10 feet.
July 7, 2016
An object moves from left to right along a parabolic shaped path y=(1/4)x^2. At the point (-2,1) the speed is 1. What normal acceleration is the object experiencing at that point?
February 16, 2016
A 82 kg runner with a speed of 5.6 m/s makes a sharp turn with a radius of 1.1 m to avoid a collision. What is the magnitude of the frictional force (in N) the ground exerts on the runner during the turn?
February 10, 2016
7 kids and 2 adults are going to the circus. Kid's tickets are on sale for only half the price of adult tickets. The total cost is $70. How much is one kids ticket? How much is one adult ticket?
February 10, 2016
ChangePE + changeKE = 0. the change in potential energy of electron is = dPE = qdV = (-e)dV. The change in kinetic energy of electron is = 1/2mV^2 - 0 = 1/2mV^2. put these together and get. (-e)dV + 1/2mV^2 = 0. 1/2mV^2 = (e)dV. mV^2 = 2(e)dV. V^2 = 2edV/m. Insert the figures ...
October 25, 2015
Would someone please help me with this? Or at least tell me the formula I should be using? I've been trying to get help with this for four days now. I'm VERY frustrated. Assume that a parcel of air is forced to rise up and over a 6000-foot-high mountain. The initial ...
July 9, 2015
Which one has the correct pronoun? The team of reporters stunned their audience when the results of the election were revealed. The team of reporters stunned its audience when the results of the election were revealed.
June 24, 2015
1. Unless otherwise instructed, you may use the periodic table in the Chemistry: Problems and Solutions book for this test. You also may use the formulas on pages 238 243. A student increases the temperature of a 556 cm3 balloon from 278 K to 308 K. Assuming constant pressure...
June 15, 2015
Question 5.5. Sandra throws an object into the air with an initial vertical velocity of 38 feet per second, from a platform that is 30 feet above the ground. How long will it take the object to hit the ground? (Points : 1) 1 second 2 seconds 3 seconds 4 seconds i think its 4 sec
June 11, 2015
Question 5.5. Sandra throws an object into the air with an initial vertical velocity of 38 feet per second, from a platform that is 30 feet above the ground. How long will it take the object to hit the ground? (Points : 1) 1 second 2 seconds 3 seconds 4 seconds
June 11, 2015
Question 28.28. Identify the sentence that is not punctuated correctly. (Points : 5) "Why did he call you Bug just then? Is that your nickname?" she asked. "Wait," she called, "I've still got to find a copy of the poem Fire and ...
June 11, 2015
I'm trying ti find the correlation coefficient for the following: The scores of 10 students on their midterm exam (x) and on their final (y) yielded the following data. Σx = 638 Σx2 = 43,572 Σy = 690 Σy2 = 49,014 Σxy = 44,636 Is the answer 0.547? ...
June 3, 2015
anatomy and physiology
1)Provide the name and chemical symbol of 4 chemical elements you find in the human body. Select 1 of the 4 chemical elements, make the drawing of the atom and label the nucleus, protons, neutrons and electrons. 2)Make a drawing showing the molecular structure (it represents/...
May 17, 2015
Introduction to business
2. Ida works on creating ways to ensure that customers receive goods at the right time and correct location. Ida is involved in her firm's ________ strategy. A. pricing B. transportation C. product D. promotion 3. Mario is part of a strategic planning team. He has ...
May 1, 2015
The university skydiving club has asked you to plan a stunt for an air show. In this stunt, two skydivers will step out of opposite sides of a stationary hot air balloon 2,500m above the ground. the second skydiver will leave the ballon 20 seconds after the first skydiver but ...
April 5, 2015
Your stores average basket (transaction) size for the month of March was $11.50 and you believe the average basket size will remain the same for your store in April. One of your hourly employees had an average basket size of $9.00 for the month of March and averaged 125 ...
April 1, 2015
The apocalypse started in NY where 100 people were infected. From there the zombie apocalypse continued to spread. After 17 minutes the number of people infected 200 people.assume that no human have figured out how to kill the zombie or stop it from spreading for the first 24 ...
March 15, 2015
Hello, I got this question wrong on a homework assignment and I still can't find the correct answer. The reduction of the chromosome number during meiosis is most important for: 1: keeping the amount of DNA in the cell at a minimum level. 2: allowing the growth of the cell...
March 1, 2015
Please excuse me for this, I know it's not well done but please look it over. Thanks Hola Amigo, Tú son invitado a una dia fiesta Valentines. En mi casa el 14 de Feburero. El fiesta empezie en desayuo y terminars en cena. Llevar los pijamas a el fiesta a el fiesta...
February 7, 2015
El Taco Barato Restaurante es un lugar en centro. Mis amigos y yo comimos allí la semana posada. La comida Fue muy barata. Los camareros no deseó trabajar. Pedí un plato especial, el taco pescado. Fue cinco dólares, y uinió con un refresco. ...
January 10, 2015
Julia and Kevin are playing games at the arcade. Julia started with $15, and the machine she is playing costs $0.75 per game. Kevin started with $13, and his machine costs $0.50 per game. After how many games will these two kids have the same amount of money remaining? Set up ...
January 8, 2015
An automobile accident investigator needs to determine the initial westerly velocity of jeep (m=1720 kg) that may have been speeding before colliding head-on with a Volkswagen (m=1510 kg) that was moving with a velocity of 75.7 km/h east. The speed limit on this road is 90 km/...
December 27, 2014
¡Hola Josefina! Tengo que hacer unos quehacers. Tengo que cortar el césped afuera, lavar la ropa en el lavadoro, y cocinar en la cocina. Mi madre me quiere sacudir los muebles en la oficina y hacer la cama también. Mi madre dice que tengo que trabajar, o no...
December 19, 2014
Two health insurance plans are offered to employees of a company. Plan 1 has a $400 deductible and then pays 65% of the rest of the cost versus plan 2 that has a $1000 deductible and then pays 75% of the rest of the cost. What would annual medical costs have to be for plan 2 ...
December 18, 2014
What mass of calcium bromide is needed to prepare 150.0 mL of a 3.50 M solution? (Assume that the molecular weight of CaBr2 is 200.618 g/mol) A. 105 g B. 100.42 g C. 0.105 g D. 103.35 g
December 16, 2014
If water, a polar molecule, is combined with another polar molecule, what can be said about the substance added to the water? A. The solubility can not be determined by only knowing the polarity. B.It is soluble in water only if the water is poured over it. C.It is insoluble ...
December 16, 2014
Arthur is performing a lab which requires a 0.2 M solution of calcium hydroxide. However, the only calcium hydroxide solution available has a concentration of 0.5 M. How can Arthur dilute the 0.5 M solution to make 10 mL of a 0.2 M solution? A.He needs to add 2.5 mL of the 0.5...
December 16, 2014
A 61.0 -kg bungee jumper is standing on a tall platform (h0 = 46.0 m), as indicated in the figure. The bungee cord has an unstrained length of L0 = 9.00 m, and when stretched, behaves like an ideal spring with a spring constant of 76.0 N/m. The jumper falls from rest, and it ...
November 25, 2014
the second side of a triangle is 6 inches longer than the first side. the third side is 2 inches shorter than the double the first side. the total perimeter of the triangle is 24 inches. find the lengths of all three sides of the triangle
October 22, 2014
Hola Tia, Gracias por el dinero de mi cumpleaños. Compré pantalones y camisas en la tienda de descuentos. Cuestan $20 dólores. Pagué $2.50 dólores por los patalones verdes y $2.50 dólores por los jeans morados. Me gusta más los ...
October 16, 2014