Ricky

Most popular questions and responses by Ricky
1. Chemistry

A 35.1g sample of solid CO2 (dry ice) is added to a container at a temperature of 100k with a volume of 4.0L. If the container is evacuated (all of the gas removed), sealed and then allowed to warm to room temperature (T=298K) so that all of the solid CO2

2. Algebra

Scott set up a volleyball net in his backyard. one of the poles, which forms a right angle with the ground, is 6 feet high. To secure the pole, he attached a rope from the top of the pole to a stake 8 feet from the bottom of the pole. To the nearest tenth

3. Chemistry

Need help! Calculate the molar concentration of OH- in a 0.724M solution of hypobromite ion (BrO-; kB= 4.0 x 10^-6) what is the pH of this solution? I got as far as kB = [OH-][HBrO]/[BrO-] please help me with the rest.

4. math

I have a math question.two fielda ats state park are 1000 meters from each other.on a map,the two fields are 8 centimeters apart.What scale is the map using?is it the metric scale??

5. Chemistry

At 298.K and 1.00 atm, assume that 22 mL of NO gas reacts with 18 mL of oxygen gas and excess water to produce nitric acid according to the following equation: 2 NO(g) + 3/2 O2 (g)+ H2O(l)?? 2 HNO3(g). If all of the nitric acid produced by this reaction is

6. physics

help me please? I'm lost... A small space probe is put into circular orbit about a newly discovered moon of Saturn. The moon's radius is known to be 550km. If the probe orbits at a height of 1500km above the moon's surface and takes 2.0 earth days to make

7. Chemistry

Magnesium can be used as a “getter” in evacuated enclosures to react with the last traces of oxygen. (the magnesium is usually heated by passing an electric current through a wire or ribbon of the metal) If an enclosures of 0.452L has a partial

8. physics

A light string of length of 56.0 cm connects two small square blocks, each with a mass of 1.50 kg. The system is placed on a slippery (frictionless) sheet of horizontal ice and spun so the two blocks rotate uniformly about their common center of mass,

9. Chemistry

If the pressure exerted by ozone, O3, in the stratosphere is 3.0 x 10^-3 atm and the temperature is 250K, how many ozone molecules are in a liter? Please help me.

10. Physics

1. A horse is harnessed to a sled having a mass of 231 kg, including supplies. The horse must exert a force exceeding 1250 N at an angle of 36.3° (above the horizontal) in order to get the sled moving. Treat the sled as a point particle. (a)Calculate the

11. Physics

A certain amount of work is required to stretch a spring from its equilibrium position. (a) If twice the work is performed on the spring, the spring will stretch more by a factor of (1)square root of 2 (2)2,(3)1/square root of 2, (4)1/2. Why? (b) If 100J

12. PHysics

A gun is fired, and a 50gram bullet is accelerated to a muzzle speed of 100m/s. If the length of the gun barrel is 0.90m, what is the magnitude of the accelerating force? Assume the acceleration is constant. Help me please???

13. Physics

A Ferris Wheel, 24.0 m in diameter, rotates once every 12.5s. What is the fractional change in a person's apparent weight: a) at the top, and b) at the bottom? I need to know if I'm doing this right. Here's my work: Equation Used: Net Force =

14. physics

A 0.50kg mass is suspended on a spring that stretches 3.0cm. a. What is the spring constant? b. What added mass would stretch the spring an additional 2.0cm? c. What is the change in potential energy when the mass is added?

15. Chemistry

When 1.00 mol of A and 0.800 mol of B are placed in a 2.00 L container and allowed to come to equilibrium, the resulting mixture is found to be 0.20M in D. What is the value of K at equilibrium?

16. Physics

A beam of singly ionized carbon atoms (C-12, C-13, and C-14 isotopes) is injected into a mass spectrometer, which isotopes would follow the trajectory of greatest diameter and strike the detection plate furthest? I know the answer is C-14, but why? can

17. Physics

two stars with equal mass of 4.0x10^15 kg are separated by a distance of 2 km. They are moving in circular obits around the middle between the two stars. What is the speed of the stars?

18. Physics

The switch in the circuit shown in the figure below is closed, and the lightbulb glows steadily. The inductor is a simple air-core solenoid. An iron rod is inserted into the interior of the solenoid, increasing the magnitude of the magnetic field in the

19. physics

In a high speed chase, a policeman's car bumps a criminal's car directly from behind to get his attention. The policeman's car is moving at 40 m/s to the right and has a total mass of 1800 kg. The criminal's car is initially moving in the same direction at

In addition to skills in creating art, which type of knowledge is important for art therapist to have to successfully perform their jobs? A. Knowledge of Physical Therapy B.Knowledge of Psychology C.Knowledge of teaching Strategies D. Knowledge of Art

32. Physics

A dockworker loading crates on a ship finds that a 19-kg crate, initially at rest on a horizontal surface, requires a 70-N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 60 N is required to keep it moving

33. physics

A truck is traveling at 19 m/s to the north. The driver of a car, 460 m to the north and traveling south at 26 m/s, puts on the brakes and slows at 3.5 m/s2. Where do they meet?

34. Physics

#1.) A wind turbine has a Cp of 0.42 and extracts 50 kW of power when the wind velocity is 25 m/sec. How long are the blades? (ρ = 1.2 kg/m3) #2.) An electric hot water heater is used to heat 30 gallons of water from 20 °C to 45 °C. a. What heat energy

38. meaning

"before you start pointing fingers.. make sure your hands are clean" i'm having trouble defining this quote or explaining it. can you help me?. i think it means before you judge someone you should make sure your actions aren't worse then theirs. uh, not

Trying to figure out how to find the answer. A rectangular has a perimeter of 3600m. What is the width if the length is five times the width? How do I do this.

40. us government

A person in Michigan applying for a job in Alabama can expect not to be discriminated against because of the ___________ Clause.

41. Math

In a survey of 624 students, 60% more preferred getting news online to getting news on tv. How many students prefer getting news online. I started with the equation 1.6x+x=624, but I don't know if this is the right set up or right idea. Any help is

42. Algebra

The equation x^2+px+q=0, q cannot be equal to 0, has two unequal roots such that the squares of the roots are the same as the two roots. Calculate the product pq. I think the obvious root would be one but the second roots i just can't figure out!

3b-9-8b=11

44. FINANCE

You are graduating in September and would like to start your own business making wine coolers. You collect the following information on the initial costs: Cost of Plant & Equipment = $500,000 Licensing & Legal Costs =$50,000 You also have been left a tidy

45. physics

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on

need the biography ofEmily Hutchinson for my English class.

47. physics

n automobile has a vertical radio antenna 1.40 m long. The automobile travels at 30.0 km/h on a horizontal road where Earth's magnetic field is 50.0 µT, directed toward the north and downward at an angle of 65.0° below the horizontal. (a) Specify the

48. Algebra

The perimeter of a triangle is 60 cm. The longest side exceeds the shortest one by 10 cm.and the sum of the lengths of the longest and the shortest ones is twice the length of the other side. Find the lengths of the sides.

49. Calc

Verify that the trigonometric equation is an identity. 1/2 sin 2 x − sin^2x over sinxcos2x = 1 over sinx+cosx Verify that the trigonometric equation is an identity. cotx over 1-sinx =secx(cscx+1) Can someone please Help!!! these are so hard for me to

50. Chemistry

How many molecules are in 0.923 mol of selenium tetrabromide?

51. calculus

Ice cream drips out of the bottom of an ice cream cone on a hot day at a rate of r(t) mL per second, as a child eats it slowly, where t is in seconds. If r(t) = 10 e^{-k t}, complete the definite integral expressing the quantity of ice cream lost in the

52. physics

A 6.0 Kg object undergoes an acceleration of 2.o m/s squared. what is the magnitude of the net external force acting on it?

53. Bussiness

The market for carrots is comprised of two segments: fresh market carrots, which have excellent, uniform color and a small core, and processing carrots, which are larger than fresh market carrots but still have good flavor, color, and sweetness. Annual

54. writing

I was wondering if in this paragraph I was going off topic, plz help, maybe give me some pointers? Im not finished with the paragraph but that's what I have so far and need someones opinion... Compassion is like handing a piece of your heart to another

55. english

Mikes car needs a new muffler and new brakes. (Which word needs an aposterphy?)

56. Math

There are two spinners, one numbered 1-6 and one labeled A & B. Spin them only once. Draw a tree diagram showing the probability of spinning 1,A

57. math

improper fractions to its mixed number

58. algebra 2

is 1.765 a rational or irrational number

66. math

Keisha had two pieces of ribbon of equal length. She cut the first piece of ribbon into 15 equal parts. She also cut the second piece of ribbon into equal parts. Nine parts of the first piece are equal in length to 3 parts of the second piece. Into how

67. science

How do the atmosphere, lithosphere and hydrosphere interact with each other?

68. writing

I want to know what is wrong in the following sentence: After six months on the job, he faced problems in his first recruitment effort; however, if he solves these problems, the new hires should be able to start working by July.

69. poetry

Narrative ,free verse, limerick,acrosstic poems about soccer

The equation x^2+px+q=0, q cannot be equal to 0, has two unequal roots such that the squares of the roots are the same as the two roots. Calculate the product pq.

71. Math

In how many different ways may the four officers be seated?

72. FINANCE

Answer both questions A).The treasurer of a German firm has €5 million to invest for three months. The annual interest rate in the Germany is 4 percent: the interest rate in the United Kingdom is 2 percent. The spot rate of exchange is €1.1/£ and the

73. FINANCE

You are graduating in September and would like to start your own business making wine coolers. You collect the following information on the initial costs: Cost of Plant & Equipment = $500,000 Licensing & Legal Costs =$50,000 You also have been left a tidy

74. physics

1. How far (in meters) must a 600 kg pile driver fall, if it is to do 14000 J of work? 2. A spring whose spring constant is 150 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.600 kg ball when released? 3. A 550 N crate rests on

My problem is... I had a rectangular garden plot area 60 sq. feet. This year it is one foot wider and 3 feet shorter...but has the same area..60 sq. feet. What were the dimensions of the plot last year. I just want to know how to get started on solving

76. Math

Solve the equation for Y X-Y=2

77. Math

-5x - 8y = (-3,0) Is this ordered pair a solution

78. Algebra

Find three different ordered pairs that are solution of the equation Y= 7+4x

79. science

kevin has a piece of aluminum which has a density of 2.7gms/cm3 and a mass of 63 grams what is the volume of the piece of aluminum

80. pre-algebra

Mara ordered 5 bags of seed for $7.00 each and 3 wildflower seed kits for$9.00 each.She also paid a \$13 shipping fee.Which expression shows the total cost? What is the solution of 5(n+m)when n=3 and m=6? Which inequality symbol makes the statement true?

81. Ellison

A cylinder that contains methane gas is kept at a temperature of 15°C and exert a pressure of 7atm.If the temperature of the cylinder increases to 25°C,what pressure does the gas now exert?

82. Algebra

Given: f(x) = 8-4x A. Find f(-2) f(2) = 8-4(-2) B. Find x, when f(x) = 8 8-4x = 8 C. Graph the function. ( a graph that has 20X and 20Y as the max numbers) D. State the domain and range of the function. (confused on what to do here) E. Use the graph to

83. Math

(3?5)?4?(14?2)=12

84. math

an airplane travels 750 miles in 1 hour and 45 minutes. what is the average velocity of the plane?

85. geography

what is the capital of fiji

86. phi

Midgley analyzes the position that each society is a separate culture with its own values. This position is known as

87. calculus

The velocity of a skateboard is v(t) = t^2 - 4 t + 3 m/s when moving in a straight line. A. Find the the change in displacement of the skateboard between 4 seconds and 6 seconds. (Note this may or may not be negative, meaning it goes in the opposite

88. calculus

\int_{4}^{13} f(x) \,dx - \int_{4}^{11} f(x) \,dx = \int_{a}^{b} f(x) \,dx where a= and b= .

89. calculus

A long narrow piece of land gets flooded each year by a river. The flooded area is in the shape of the area under the curve y = 2.3 x^3 and above the x-axis, for 0 \le x \le 3.2. All the distances are in metres.

90. calculus

a. The value of \displaystyle \int_{-2}^{-1} \frac{14}{ 4 x } dx is b. The value of \displaystyle \int_{1}^{2} \frac{14}{ 4 x } dx is

91. calculus

The following definite integral can be evaluated by subtracting F(B) - F(A), where F(B) and F(A) are found from substituting the limits of integration. \int_{0}^{4} \frac{1600 x +1200 }{(2 x^2 +3 x +1)^5}dx After substitution, the upper limit of

92. calculus

Find the area of the region under the curve y = 16 e ^{4 x} between x = -1.4 to x =1.4 .

93. word problem

juan bought 12 oranges and ate 1/4 of them carla bought 12 oranges and ate 1/3 of them . which ate more

94. phy

Some air at 275 kPa absolute pressure occupies 50.0m^3. Find its absolute pressure if its volume is doubled at constant temperature.

95. physics

a comet experiences a uniforn acceleration from 60m/s to 183m/s what is the rate of acceleration?

96. maths

find the general solution of the following first order differential equation. t*(dy/dt) = (-y/t) + ((exp(1/t)/t^3) could you show steps in working to solution.

97. WRiTinG

does this paragraph have a good flow? “Nothing is a waste of time if you use the experience wisely.” – Rodin. Time management is the process of exercising conscious control over the amount of time spent on specific activities. I, too, once had been a

98. math

Solve 5 divide by 6 plus 1 divide by10

99. math

what numbers have both of the given numbers as factors 3 and 5