Questions Asked onSeptember 7, 2012

1. chemistry

the diameter of a helium atom is about 1*10^2pm.suppose that we could line up helium atoms side by side in contact with one another. aproximately how maney atoms would it take to make the distance from end to end 1cm ?

2. Geometry

Write these definitions using the classify and differentiate method to fill in the blanks: a. An octagon is __________ that ___________. b. A concave polygon is __________ that ___________. c. A 20-gon, also called an icosagon, is __________ that

3. physics

In an action movie, the villain is rescued from the ocean by grabbing onto a ladder hanging from a helicopter. He is so intent on gripping the ladder that he lets go of his briefcase full of counterfeit money when he is 126.4 m above the water. If the

4. math

The table shows the median home prices in Florida. What is the equation of a trend line that models a relationship between time and home prices? Use the equation to predict the median home price in 2020. Year 1940 1950 1960 1970 1980 1990 2000 Median

5. math

The distance between city A and city B is 500 miles. On a certain wall map, this is represented by a length of 2.3 feet. On the map, how many feet would there be between city C and city D, two cities that are actually 800 miles apart? On the map, city C

6. physics

Electrons move through a certain electrical circuit at an average speed of 1.7 x 10-2 m/s. How long (in minutes) does it take an electron to traverse a 1.8 -m light bulb filament coil?

7. Programming in Python

A customer in a store is purchasing five items. Design a program in python that asks for the price of each item, and then displays the subtotal of the sale, the amount of the sales tax , and the total. Assume the sales tax is 6 percent.

8. chemistry

an aluminum cylinder is 10.0 cm in length and has a radius of .25 cm. if the mass of a single atom of aluminum is 4.48X10^-23 calculate the number of aluminum atoms present in the cylinder. the density of aluminum is 2.70 g/cm^3 Please answer quickly.

9. english

The statement below represents which genre from the early american and colonial period. I want to explain origins of the natural world and its processes. the poetry of anne bradstreet the oral tradition of native americans the journals of william bradford

10. Maths

whats the probability of gatting a matching pair of socks if there are 8 gree and 10 blue

11. math

how many 4 number combinations can there be from 0-99 without repeating a number?

12. physics

The highest George can suck water up a very long straw is 2.0m What is the lowest pressure he can maintain in his mouth? Express to two sig figs

13. physics

Assume that a small sugar cube has sides 1 cm long. If you had a box containing 1 mol of cubes and lined them up side by side, how long would the line be (1 mol = 6.02 x 10^23)?

35. math

An electrician cuts a 26ft piece of wire into two pieces. One piece is 4ft longer than the other. How long are the pieces? What is the length of the shorter piece?__ft

36. math

The sum of the measures of the angles of any triangle is 180 degrees. In triangle abc, angles a and b have the same measure, while the measure of angle c is 78 degrees larger than each of a and b. What are the measures of the three angles? angle a is

37. math

Write the ratio as a fraction in lowest terms. compare in inches. 3ft to 31 inches. The ratio is__.

38. Computers

If a floptical disk doesn't have a write-protection notch, how is write-protection accomplished?

39. physics

A certain car is capable of accelerating at a rate of + 0.80 m/s2. How long does it take for this car to go from a speed of 15 mi/h to a speed of 75 mi/h?

40. Math

Two particles X and Y joined by a rigit rod of negligible mass, move along a smooth horizontal plane. Particle X has mass 7.7kg and is pushed by an external force Fx of magnitude 73.01N. Particle Y has mass 5.68kg and is pulled along the plane by an

41. college physics

in a pinball machine, a force of 24 N is used to compress a spring a distance of 0.080m. a. What is the potential energy stored in the spring? b. What is the maximum speed tha it van produve in a ball of mass 0.15kg?

42. chemistry 104

if a person uses 670 kcal on a long walk, calculate the energy used for the walk in kiljoules

43. Chemistry

Suppose you have two 100- graduated cylinders. In each cylinder there is 37.0 of water. You also have two cubes: One is lead, and the other is aluminum. Each cube measures 1.2 on each side.After you carefully lower each cube into the water of its own

44. chemistry

what volume of water should be added to 300ml of HNO3 0.25M to obtain HNO3 0.2M?

45. economics

You have been hired by a local used car dealer to help in their pricing of used cars. (Hey, it’s temporary thing, just to help you earn some extra cash.) They want to know whether the prices of the cars they sell are more influenced by the age of the car

46. math

A pipe is 42 inches long. It is to be cut into three pieces such that the longest is four times as long as the shortest and the middle-size piece is six inches longer than the shortest. How long is the middle-sized piece?

47. algebra

If you could please help show me the steps so i can continue on with my assignment i would be very appreciative: Problem 9 - p/4 = 5

48. Math

Any help would be appreciated! What is 38.896/5.1 + 509.15 to the correct number of significant figures? 516.78 What is (154+8446.1)/54 to the correct number of significant figures? 159.261 Thanks!

49. Math

Odd number between 411 and 423 with sum of 12

50. algebra

Could someone please check my work. what is the slope of the line that passes through the given points?(2,12( and (6,11) -1/4 (my choice) 1/4 4 -4 My work: 11-12/6-2=-1/4 what is the slope of the line that passes through the given points? undefined( my

51. law/421

what challenges to you face in protecting your intellectual property for any state based business? then how does that change for a nationally based business? then how does that change for an international business?

52. Physics

To make a large-scale representation of a hydrogen atom in its ground state, you start with a super ball (D=4.00 cm) to represent the nucleus. How far away, R, in km will you have to put the representation electron? R=____km

53. physics

4. A rat named Littleguy runs in a treadmill (a wire wheel) with a diameter d =8.00 inches. In 5.00 minutes, Littleguy makes the treadmill rotate 2.80 x 10² times. If the rat were running along the ground, how far would he have run? What was his average

54. physics

A soccer ball leaves the foot of a player with an intitial velocity of 22 m/s at an angle of 30 degrees above the positive x-axis. What is the initial velocity in the x-direction? Two sigfigs Remember...no units...but it would be in m/s

55. health

While taking medications, people with HIV ________. A. Can transmit HIV infection to others through unprotected sex B. Cannot transmit HIV to others through unprotected sex C. Cannot transmit HIV to others through needle sharing D. All of the above

56. Geometry

In the triangle ABC, the measure of angle A=(5x+3)degrees, the measure of angle B=(8x-2)degrees, and the measure of angle C=(5x-1) degrees. Find the measure of each angle.

57. math

Jose lives on the side of a mountain and the elevation of his residence is 1145 feet above sea level. His brother lives in a deep valley the is 20 feet below seal level. What is the difference in altitudes of the locations occupied by the two brothers?

58. algebra

I don't understand this question How would you explain to your friend why the quotient of x*6 and x^2 is x^6 Remember your friend is questioning the rule, so you just cannot say it is the rule.

59. Calculus

Hello, I just wanted to verify if my work was good. Calculate the following integral by parts: ∫ upper limit is 1/5 and lower limit is 1/10. of 10sin^-1 (5x)dx so first I named the variables: u = 10 sin^-1 (5x) du = 50 / sqr(1-25x^2) dv = dx v = x so we

60. physics

A soccer ball leaves the foot of a player with an intitial velocity of 22 m/s at an angle of 30 degrees above the positive x-axis. What is the initial velocity in the y-direction? Two sigfigs Remember...no units...but it would be in m/s

61. physics

A soccer ball leaves the foot of a player with an intitial velocity of 22 m/s at an angle of 30 degrees above the positive x-axis. What is the velocity of the ball at its maximum height?

62. math

Show that ( a1/3 - b1/3) ( a2/3 +a1/3 * b1/3 + b2/3 )?

63. physics

which natural phenomenon can describe light as a wave?

64. Math/Excel

I'm not sure what two excel functions to use that will give the correct answer and how to copy the information to each cell and the values stay the same. 2. A home loan is to be repaid by a series of equal monthly payments over many years. Prepare a

65. DBM 381

Create a detailed ERD using the Entities and Attributes document provided with the Service Request. Create a Microsoft® Access® database using the ERD created above. You do not need to include keys and relationships at this point. Include the following: