Posts by kristi

Total # Posts: 148

Physics
oh so the formula would be W=ma, hence, 78kg/190N=W?

Physics
During an episode of turbulence in an airplane you feel 190 N heavier than usual. If your mass is 78 kg, what are the magnitude and direction of the airplane's acceleration? For the F=ma, I manipulated the equation and have gotten, a=190N/78kg=2.4 is this correct? And how ...

Physics
I've got it, thank you.

Physics
On vacation, your 1400-kg car pulls a 560-kg trailer away from a stoplight with an acceleration of 1.85 m/sz. (a) What is the net force exerted on the trailer? (b) What force does the trailer exert oc the car? (c) What is the net force acting on the car?

Physics
Please help me, I am in dire need of it, A football quarterback shows off his skill by throwing a pass {5.70 m downfield and into a bucket. The quarterback consis- tently launches the ball at 38.00' above horizontal, and the bucket is placed at the same level from which ...

Physics
Question is in photo.

Physics
C:\Users\Kristi\Pictures\Screenshots\Screenshot (691).png

Physics
So I did 5.7cos(38)= 4.49, 2sin(38)= 1.23 and 46.50 cos(38)=36.64 did I do this correctly and what shall I do next?

Physics
Thank you so much Scott, I've been trying to figure out this problem for the longest.

Physics
Please help me, I am in dire need of it, A football quarterback shows off his skill by throwing a pass {5.70 m downfield and into a bucket. The quarterback consis- tently launches the ball at 38.00' above horizontal, and the bucket is placed at the same level from which ...

acc 305 accounting

calculus
the fence around a rectangular compound costs \$4 a foot for three of the four sides. the fourth side is the wall of a building, so no fence is needed for that side. we will call the distance of the fence parallel to the wall w for width and the two other sides d for depth. a) ...

Technology
Thank you so much I got a 4/4 I needed this 100%

Algebra
If you have a box of chocolate that has 5 dark chocolates and 8 milk chocolates. How many times would you have to reach in the box and take a chocolate out at a time. How many times would you have to reach in to get at least either 2 milk or 2 dark chocolate bars.

Algebra
If you have a box of chocolate that has 5 dark chocolates and 8 milk chocolates. How many times would you have to reach in the box and take a chocolate out at a time. How many times would you have to reach in to get at least either 2 milk or 2 dark chocolate bars.

math
16

DPS sub: science ( chemistry)
an element 'x' react with water to form a solution which turns phenolphthalein indicator pink .The element 'x' is most likely a) sulphur b) sodium c) carbon d) silicon

english
Which word in the sentence does the participial phrase modify? Pausing for effect now and then, Nicole read the best parts aloud. A. read B. parts C. Nicole D. aloud

Chemistry
For the complete combustion of 1.000 mole of ethane gas at 298K and 1 atm pressure, change in H= -1560 kJ/mol. What will be the heat released when 4.42g of ethane is combusted under these conditions?

math Question
the 5th term in a geometric sequence is 160. The 7th term is 40. What are the possible values of the 6th term of the sequence +70 70 +80 80

Science
Hey guys! If you could help me with a few of these question (they are fill in the blanks), that would be much appreciated. 1. Fertilizers and pesticides pplied to farm fields in Pennsylvania have made their way down into the Chesapeake Bay in Maryland. This is an example of ...

Physics!
has no reaction counterpart

science
If we drilled a hole straight through the earth, and dropped a golf ball down the hole, starting initially at rest, how fast would the ball be traveling when it reached the center of the earth. The earth’s radius is 6378 km.

algerba 1
i need help solving the properties of an quotient properties of exponents

math
256+273= New ten?

math
256+273=

Psychology- Assessments
Response to Intervention; discrepancy

Math
For each 10-degree adjustment on your water heater thermostat, you can reduce carbon dioxide emissions by 500 pounds a year. By how many pounds will you reduce your carbon dioxide footprint if you turn down your water heater thermostat from 140¢ªF to 120¢ªF...

Math: Solving Trig Equation
9tan (x) - 9 sec^2 (x)/ tan (x)

College Algebra
A rectangle is bounded by the x-axis and the semicircle Y= SQ RT of 4-x^2. Write the area A of the rectangle as a function of x and determine the domain of the function.

stats
A clothing company employs 36 workers on first shift and 19 workers on second shift. Five workers are chosen at random to be interviewed about the work environment. Find the probability of choose: a) All first-shift workers b) all second-shift workers c) six first-shift ...

Math
by solving at hand?

Math
How did you get 36/7 Ms. Sue?

Math
-90/7+18 step by step, fraction answer

math
A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as follows: Student Anxiety Scores Study Hours 5 1 10 6 5 2 11 8 12 5 4 1 3 4 2 6 6 5 1 2 Why is a correlation the most appropriate statistic? What is the...

Case Management
Intervention planning involves both treatment planning and service planning. Treatment planning involves planning for clinical or therapeutic services, while service planning involves the linking of clients to services for comprehensive assistance. Describe effective ...

Math
The table shows men's shoe sizes in the United States and the corresponding European shoe sizes. Let y = f(x)represent the function that gives the men's European shoe size in terms of x, the men's U.S. size. Men's U.S. shoe size, Men's European shoe size 8 ...

Algebra
Year, t Sales, S(t) 1 62 2 246 3 664 4 1579 5 3258 6 8430 7 14,532 (c) If S−1 exists, find S−1(3,258).

Algebra
Give the domain of (f - g)(x) and (g of f)(x) where f(x)=3 -x and g(x) - ã(x)

Math
The number N of bacteria in a refrigerated food is given by N(T) = 10T2 − 20T + 700, 1 ¡Ü T ¡Ü 20where T is the temperature of the food in degrees Celsius. When the food is removed from refrigeration, the temperature of the food is given by T(t) = ...

Math
The table plot on my homework is givving me the wrong answer.

Math
It's still giving me the wrong answer. and how do I plot -5/2, when the graph shows no decimals?

Math
Graph the function. g(x)={x+2, x less than or equal to -3 1/2x-2, x>-3

Algebra
Find the difference quotient and simplify your answer. Step by step. f(x) = 3x2 − 6x, f(x + h) − f(x) h , h ‚ 0

Algebra
Which sets of ordered pairs represent functions from A to B? (Select all that apply), and Explain how you've gotten your answer? A = {a, b, c} B = {8, 9, 10, 11}

world history
How did spain change after the war with england in 1588?

Algebra
The number of medical doctors D (in thousands) in the United States from 1998 through 2006 can be modeled by D = 431.61 + 121.8t, 8 ¡ t ¡ 16 where t represents the year, with t = 8 corresponding to 1998.¢Ó (a) In which year did the number of medical ...

Algebra
square roots to replace the a's

Algebra
I'm sorry I wrote the equation wrong 3ã(x+1)-ã(7x+8)=1

Algebra
square root>(3x + 1)− square root>(7x + 8)= 1

Algebra
x^3 + 6x^2 + 5x + 30 = 0

Physics
Use the position equation given below, where s represents the height of the object (in feet), v0 represents the initial velocity of the object (in feet per second), s0 represents the initial height of the object (in feet), and t represents the time (in seconds), as the model ...

Physics
An open box with a square base (see figure) is to be constructed from 160 square inches of material. The height of the box is 3 inches. What are the dimensions of the box? (Hint: The surface area is S = x2 + 4xh.) 1 . in. (length) × 2 . in. (width) × 3 . in. (height)

Algebra
The floor of a one-story building is 14 feet longer than it is wide (see figure). The building has 1472 square feet of floor space. a) Write a quadratic equation for the area of the floor in terms of w. (b) Find the length l and width w of the floor.

science
when you want to pull downward to lift something, the main advantage of passing a rope upward and through a single pulley, rather than just up over the branch of a tree, is that the pulley does what?

Chemistry
A)How many moles of O2 are required for the complete combustion of 2.2 g of C3H8 to form CO2 and H2O? b)A 65.25 g sample of CuSO4•5H2O (M = 249.7) is dissolved in enough water to make 0.800 L of solution. What volume of this solution must be diluted with water to make 1....

Algebra
Thank You so much Elle

Algebra
Write an equation of the line containing the given point and perpendicular to the given line. Express your answer in the form y=mx+b. (2,4) 3x+y=6 The equation of line is y=, and explain how you have gotten the answer.

Algebra Math
Thank You Reiny for your help, I accidentally posted the question under the other student's question, I apoloigze.

Algebra Math
Thank You, Declan for answering my question, but I am still haiving trouble on the problem, could you explain to me of how you went about getting the answer -55/4, in deeper detail.

math
Write an equation of the line containing the given point and parallel to the given line. (6,-7):9x-8y=3 The equation of the line is y=

Math
Write an equation of the line containing the given point and parallel to the given line. (6,-7):9x-8y=3 The equation of the line is y=

physics
How long is a rocket in the air if it is shot at an angle of 55¢ª with an initial velocity of 25 m/s and traveled for 88 m

physics
A ball rolling down an incline travels 6.0 m in the first 0.25 seconds, and 24 m in the first 0.50 seconds. Find: The average speed for the first time interval

Chemistry
What is the activation energy for a simple A->B fist order type of reaction with the following rate constants at different temperatures? Temp rate constant (k) 310K 1.77 x 10-1s-1 480K 3.22 x 10^2s-1

physics
Please help. Thanks! A car/truck with an initial displacement of 10.0 m and an initial velocity of 16.0 m/s accelerates at an average rate of 0.50 m/s2 for 4.0 s. What is the vehicle's displacement after 4.0 s?

physics
two dogs play tug of war with a rope toy that has a mass of 0.50 kg. if one dog pulls on the toy with a force of 140.0 N, and the other dog pulls in the opposite direction with a force of 138.0 N, what is the horizontal acceleration of the toy?

Chemistry
Write the general rate equation for each of the components in the balanced equation for the combustion of butane 2C4H10(g)+ 13O2(g)-> 8CO2(g) + 10H2O(l)

Chemistry
Thank you!

Chemistry
do you then multiply that answer by 100?

Chemistry
What is the mass percent of NaCl in a solution obtained by mixing 50g of this solution with 215g of H20?

physics
A concave mirror has a focal length of 13 cm. The mirror forms an image located 40 cm in front of the mirror. What is the magnification of the mirror?

Physics
A drop of water on a countertop reflects light from a flower held 2.8 cm directly above it. The flower's diameter is 1.7 cm, and the diameter of the flower's image is 0.17 cm. What is the focal length of the water drop, assuming that it may be treated as a convex ...

Physics
The outside mirror on the passenger side of a car is convex and has a focal length of -7.2 cm. Relative to this mirror, a truck traveling in the rear has an object distance of 20 m. Find (a) the image distance and (b) the magnification of the mirror.

Chemistry
How many grams of CO2 would be produced from the following reaction sequence? HI + KHCO3 -> KI + H2CO3 H2CO3 -> H2O + CO2 if 20.0 ml of 1.00 M KHCO3 solution is mixed with 20.0 ml of 1.50 M HI solution.

Statistics
For all of the following use the five step process to solve the problem in the question, that is, state the null hypothesis, the alternative hypothesis, the level of significance and the type of test (z-test, t-test, p-value, confidence limit and whether it is two tailed, one-...

Statistics
Please help!! I have no idea how to do this question. 14. A sample of 40 CD’s from your collection showed a mean length of 52.74 minutes with a standard deviation of 13.21 minutes a. Construct the 95 percent confidence interval for the mean. b. Construct the 95 percent ...

Physics
A 5.30-ìC charge is moving with a speed of 9.30 x 104 m/s parallel to a very long, straight wire. The wire is 6.60 cm from the charge and carries a current of 87.0 A. Find the magnitude of the force on the charge.

Physics
A 5.30-ìC charge is moving with a speed of 9.30 x 104 m/s parallel to a very long, straight wire. The wire is 6.60 cm from the charge and carries a current of 87.0 A. Find the magnitude of the force on the charge.

Physics
A)Two identical resistors are connected in parallel across a 30-V battery, which supplies them with a total power of 7.0 W. While the battery is still connected, one of the resistors is heated so that its resistance doubles. The resistance of the other resistor remains ...

Physics
A)Two identical resistors are connected in parallel across a 30-V battery, which supplies them with a total power of 7.0 W. While the battery is still connected, one of the resistors is heated so that its resistance doubles. The resistance of the other resistor remains ...

Chemistry
A)What mass of silver chloride can be produced from 1.33 of a 0.207 solution of silver nitrate? I got this one, its 39.4 g B)The reaction described in Part A required 3.28 of potassium chloride. What is the concentration of this potassium chloride solution? I keep getting 0.08...

Physics
A)What mass of silver chloride can be produced from 1.33 of a 0.207 solution of silver nitrate? I got this one, its 39.4 g B)The reaction described in Part A required 3.28 of potassium chloride. What is the concentration of this potassium chloride solution? I keep getting 0.08...

Physics
Two point charges, +3.90 ìC and -7.50 ìC, are separated by 3.30 m. What is the electric potential midway between them?

Physics
I have done this, but I still cannot get the correct answer.

Physics
A)Two point charges, +3.90 ìC and -7.50 ìC, are separated by 3.30 m. What is the electric potential midway between them? B)The drawing shows four point charges. The value of q is 1.3 ìC, and the distance d is 0.95 m. Find the total potential at the ...

Physics
Four identical metallic objects carry the following charges: +1.46, +6.39, -4.06, and -9.94C. The objects are brought simultaneously into contact, so that each touches the others. Then they are separated. (a) What is the final charge on each object? (b) How many electrons (or ...

Physics
Four identical metallic objects carry the following charges: +1.46, +6.39, -4.06, and -9.94C. The objects are brought simultaneously into contact, so that each touches the others. Then they are separated. (a) What is the final charge on each object? (b) How many electrons (or ...

Chemistry
How many oxygen atoms are in 3.20g of quartz?

Physics
The drawing (which I will describe) shows a top view of a door that is free to rotate about an axis of rotation that is perpendicular to the screen. Find the net torque (magnitude and direction) produced by the forces F1 and F2 about the axis. Picture displays a yellow ...

Physics
A solid disk rotates in the horizontal plane at an angular velocity of 0.034 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.11 kg·m2. From above, sand is dropped straight down onto this rotating disk, so ...

Physics
A 8.49-m ladder with a mass of 24.2 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 247 N. At the instant the top of the ladder leaves the ground, the ladder experiences an angular acceleration of 1.75 rad/s2 ...

Physics
How do I figure out the speed then?

Physics
A 50.3-g golf ball is driven from the tee with an initial speed of 57.0 m/s and rises to a height of 33.2 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 7.04 m below its highest point?

Physics
A thin rod (length = 1.03 m) is oriented vertically, with its bottom end attached to the floor by means of a frictionless hinge. The mass of the rod may be ignored, compared to the mass of the object fixed to the top of the rod. The rod, starting from rest, tips over and ...

Physics
A 3.0-kg cart is rolling along a frictionless, horizontal track towards a 1.2-kg cart that is held initially at rest. The carts are loaded with strong magnets that cause them to attract one another. Thus, the speed of each cart increases. At a certain instant before the carts ...

Physics
A 3.30-g bullet, traveling at a speed of 492 m/s, strikes the wooden block of a ballistic pendulum, such as that in Figure 7.14. The block has a mass of 232 g. (a) Find the speed of the bullet/block combination immediately after the collision. (b) How high does the combination...

Physics
I am not sure I am understanding this answer. Also if you knew how to do part b

Physics
A 49.9-g golf ball is driven from the tee with an initial speed of 48.8 m/s and rises to a height of 24.0 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 5.42 m below its highest point?

Physics
Some gliders are launched from the ground by means of a winch, which rapidly reels in a towing cable attached to the glider. What average power must the winch supply in order to accelerate a 163-kg ultralight glider from rest to 27.9 m/s over a horizontal distance of 46.8 m? ...

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