1. science

A ball of mass 1 kg dropped from 9.8m height , strikes the ground and rebounds to a height of 4.9m .If the time of contact between ball and ground is 0.1s,then find impulse and average force acting on ball.

2. Math 2

The rectangle below has an area of 30k^3+6k^2 The width of the rectangle (in meters) is equal to the greatest common monomial factor of 30k^3 and 6k^2 What is the width and length of the rectangle? Width:6k^2 Length: I couldn't find the length I need to be

3. College Algebra

A local road has a grade of 4%. The grade of a road is its slope expressed as a percent. a. Find the slope of the road as a fraction and then simplify the fraction. b. What rise and run would reflect this slope or grade?

4. Physics

A small metal bead, labeled A, has a charge of 26 nC . It is touched to metal bead B, initially neutral, so that the two beads share the 26 nC charge, but not necessarily equally. When the two beads are then placed 5.0 cm apart, the force between them is

5. Chemistry

The rate constant for the decomposition of acetaldehyde, CH3CHO, to methane, CH4, and carbon monoxide, CO, in the gas phase is 1.59 ✕ 10−2 L/mol/s at 711 K and 3.63 L/mol/s at 855 K. Determine the activation energy (in kJ/mol) for this

6. Physics

A parallel-plate capacitor is constructed of two horizontal 15.2-cm-diameter circular plates. A 1.9 g plastic bead, with a charge of -5.6 nC is suspended between the two plates by the force of the electric field between them. What is the charge on the

7. Chemistry

A model rocket is launched straight upward with an initial speed of 45.0 m/s. It accelerates with a constant upward acceleration of 1.50 m/s2 until its engines stop at an altitude of 160 m. A. what is the max height reached by the rocket? B. How long after

8. Math

Sarah flipped a pair of coins 60 times on 24 occasions, heads appeared on both coins. How is this outcome different from the expected outcome? It occurred 9 more times than expected it occurred 4 more times than expected It occurred 6 fewer times than

9. math

An ice cream cone is 6m x 63cm√ in depth. How many ice cream cones would you need for 630 cm of ice cream?

10. PHYSICS

A car traveling 95 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.80 m . What was the magnitude of the average acceleration of the driver during the collision? Express the answer in terms of "g's,"

11. Algebra

The management of Hartman Rent-A-Car has allocated \$1.92 million to buy a fleet of new automobiles consisting of compact, intermediate-size, and full-size cars. Compacts cost \$16,000 each, intermediate-size cars cost \$24,000 each, and full-size cars cost

12. Focus on the Child, Part 2

Which of the following is not true of social skills? A. Social skills help to foster cooperation and interdependent relationships. B. Social skills are related to the culture within which they're formed. C. Social skills are more strongly associated with

13. Chem

When 5.49 g of platinum reacts with an excess of fluorine, 7.65 g of platinum(_) fluoride forms. a. What is the mass of fluorine in the compound? b. Find the number of moles of platinum that reacted. c. Find the number of moles of fluorine that reacted. d.

14. Math.... Anyone wanna help?

What number must be placed in the blank below so that the resulting quadratic is the square of a binomial: x^2 - 36x + __

15. math

A kitchen is to be covered by linoleum. The area is 2m wide and 3.6m long. A roll of linoleum is 90 cm wide at P 12.60 per meter. Find the total length of linoleum required

16. Focus on the Child, Part 2

Which of the following statements is true of children and stress? A. Children's needs should never be postponed or they'll suffer damaging stress effects. B. Children need to face some stress and problems to develop strength and coping skills. C. Stress

17. chemistry

How much SrCl2 is needed to make 100ml of 2.0 molar SrCl2 solution?

18. Chemistry

What will be the molarity of the resultant solution obtained by mixing equal volumes of 1M and 5M ofNaOH.

19. Math

You are riding a roller coaster. Your velocity is -17 per second. What is your speed? Give the units

20. Chemistry

The decomposition of ethane, C2H6, is a first-order reaction. It is found that it takes 212 seconds to decompose 0.00839 M C2H6 to 0.00768 M. What is the rate of decomposition (in mol/L-h) when [C2H6] = 0.00422 M? A. 6.43 x 10^-3 mol/L-h B. 6.34 x 10^-5

21. math

What is 0.26 written as a fraction in simplest form?

22. chem

Cesium-137 is part of the nuclear waste produced by uranium-235 fission. The half-life of cesium-137 is 30.2 years. How much time is required for the activity of a sample of cesium-137 to fall to 25.1 percent of its original value?

23. Chemistry

For the decomposition of dinitrogen oxide, the rate constant is 0.043 L/mol-min at 665 oC and 12.5 L/mol-min at 828 oC. What is the activation energy of the decomposition reaction?

24. Fine Art

Describe examples of the similarities and differences between monasticism and feudalism. I don't know how to compare the two. My textbook says: Feudalism was a system in which weak noblemen gave up their lands and much of their freedom to more powerful

25. BioChem

How much Tris-HCl would you need (in grams) to add to create 100 mL of a 0.223 M Tris buffer that is pH 9.64. The pKa of Tris-HCl is 8.30. I'm on my last try and thought I had it multiple times but keep getting it wrong.

26. Mathematics

Raymond took a survey of classmates to determine the favorite subject of the students in his middle school the results of his survey are shown in the table english=9 math=17 science 13 social studies=11 There are 300 students in Raymond's middle school

27. Math

Everett made 3/5 of the baskets he shot. Suppose he shot 60 baskets. How many did he make?

28. College Algebra

A phone company has a monthly data plan where a customer pays flat monthly fee of \$30 and then a certain amount of money per gigabyte (GB) of data used on the phone. If a customer uses 3 GB, the monthly cost will be \$42. If the customer uses 8 GB, the

29. Math

Amy is making a drawing of different things in her neighborhood. One house she drew is 30 feet wide. Her scale drawing of the house is 5 inches wide. Which of the following uses the same scale Amy used to draw this house. A 54 foot-tall water tower is

30. science

the best explanation of why the Moon appears to change shape throughout the month is •from Earth's perspective, we see varying amounts of the illuminated part of the Moon. • the Moon is revolving around the Earth** • from a bird's eye view, the Moon

31. chemisty

What is the half-life of polonium-218 if 5.37 minutes are required for the activity of a sample of polonium-218 to fall to 29.5 percent of its original value?

32. Mathematics

Martina played a game with a spinner that had three equal sized-sections. Each section was a different color. She recorded the result of each spin during a game with her friends. The table below shows the total number of times the spinner landed on each

33. chemisty

Chromium-51 is a radioisotope that is used to assess the lifetime of red blood cells The half-life of chromium-51 is 27.7 days. If you begin with 30.1 mg of this isotope, what mass remains after 44.6 days have passed?

34. Physics

The length of wire is 25.5cm and it's radius is 1.02mm. Calculate the percentage error in mesurement of its volume

35. Math

The diameter of a wheel car is 42 cm.how much distance will it covers in 200 revolutions

36. chemistry

a graduated cylinder contains 135 ml of water. a 11.0 g piece of iron (d=7.86g/ml ) and a 24.0 g piece of lead (d=11.3g/ml) are added. what is the new water level in the cylinder?

37. Algebra

Where do I put parentheses and brackets to make this statement true? 15÷3×5+4×8 = 40

38. Physics

What’s the specific heat of a material if it takes 6.5 kJ to increase the temperature of a 1.8 kg sample by 6.4 ∘C ?

39. Math

Jada, Lin, and Elena are saving for a trip. Together they saved \$120. Jada save\$20 less than lin. Lin saved 3 time as much as elena.Write and expression to represent the total amount of money they saved.

40. English

1. We have to discuss gender discrimination. 2. In French the adjective must agree with the noun in number and gender. ................ In each sentence, can we use 'sex' instead of 'gender'?

41. Math

You are riding on a roller coaster. Your velocity is 13 ft./s. What is your speed. Give the units

42. Geometry Question

Why are the angles of an equilateral triangle always 60 degrees?

43. Physics

You’re having your home’s heating system replaced, and the heating contractor has specified a new system that supplies energy at the maximum rate of 40 kW. You know that your house loses energy at the rate of 1.3 kW per temperature difference between

44. Math

A giant wheel in a fair had a diameter 42m.What is a the distance a person travels in one complete revolution?

45. Chemistry

I'm sorry But I'm still so badly stuck and I don't get it Initial mass of candle 40.3g Mass of tin calorimeter 41.1g Mass of half-filled calorimeter with water 220.4g Initial temp of water 18.8°C Final temp of water 26.6°C Final mass of candle 38.2g

46. Chem

Convert 4 weeks to seconds using dimensional analysis

47. Math

Convert 1 century to minutes using dimensional analysis

48. math

hi, one question i have is for the following problem:"Two families meet at a park for a picnic. At the end of the day, they part ways. Family A leaves 15 mins after family B and travels east at an average speed of 42mph; while, family b travels west at an

49. Math

Go to learnalberta.ca username is LA57 password is 2149 Go to T4T courses Put in grade 11 and math The resources will show up, click on 20-1 learn everywhere. I need help on module 3 quadratic functions project please.

50. math

Ms. Cruz is 44 years old. She was 21 years old when she bore her oldest daughter who is six years older than her youngest son. How old is her youngest son?

51. Math

If there are 7.8 billion people and 46% are female how many people of the total are female? Do I do .78 * 46

52. Science

What bachelors of science,masters degree and ph.d to become archaeologists

53. Math

Illustrate using examples the three methods of Showing scale

54. math

The value p varies directly with q^-1. If p=1/6 when q=5/8, what is the value of p when q=18? A)864/5 B)7/24 C)5/864 D)-8/135 I did the p=kq, and found p to be 24/5 but that's not a choice. Help!!

55. English

posted by rfvv Monday, May 2, 2016 at 5:16pm. William became famous and had a chance to study in high school again. ------------------------- In this sentence, what is the role of "to....." in "a chance to..."? I mean the relationship between 'a chance'

56. Math

How many 1 1/4 foot pieces can you cut from a piece of wood that is 20 ft long

57. algebra 2

In 1862, two companies were given the rights to build a railroad from Omaha, Nebraska to Sacramento, California. The Central Pacific Company began from Sacramento in 1863 and averaged 8.75 miles of track per month. Twenty four months later the Union

58. chemistry

this is a C1V1=C2V2 type question: if a container has 100ml of 1.5M Br, what is the concentration in that container?

59. math

The formula for the height,h, of an equilateral triangle is h= √3/2s, where s is the length of the following A.In terms of the length of a side,s, only B. In terms of the height,h only

60. Biochemistry UB Cameroon

If 8A pass for 2minutes at the cathode(where the following reaction takes place, Ag+ + e- --->Ag) how many grams of silver metal are passed onto the cathode??

61. Math

Jada, Lin, and Elena are saving for a trip. Together they saved \$120. Jada save\$20 less than lin. Lin saved 3 time as much as elena.

62. maths

Ravi bought a leather Coat costing Rs. 900 at Rs.990 after paying the VAT charged on the coat.

If you used a peach as a model of an animal cell, what would the fruit represent and why? It would represent the cytoplasm because it would contain the "insides" of the peach.

64. 21st literature Century the world and the philippi

Hi i needed some help to report the tessaract by alex garland (Excerpt) The problem is i didn't understand the novel and my teacher said we need to be more creative at reporting. Kindly please help me thanks.

65. english

A. Need to know if the following is Noun, adjectival or adverbial clause. !. When I was outside, I saw a blue jay. 2. The city of Austin is the city that I call home. 3. I once saw a tortoise in my back yard, and I have seen a raccoon on the patio. 4.

66. Physics

What is a time period

67. Maths

Product of two numbers is 59761. If one number is 1591 . Find other number

68. chemistry

Why is 5% NaOH insoluble in HCl?

69. life orientation

What are the factors that encourage pollution?

70. chemistry

How many sig figs do i write down for this: (2.06/5.999)+156.5?

71. Math

10 Giga joules in scientific notation

72. Math

If a car is 22% efficient and you use 15 gallons of gas how much gas was used to actually run the car in gallons?

73. Algebra 1

The difference of twice a number g and 10 is 24

74. Statistics

3. A researcher wanted to study the effect of low light environments on the growth of alfalfa plants, so she grew six plants and measured their heights after two weeks. She calculated a sample mean of 5.2 cm with a standard deviation of 1.1 cm. If the

75. Math

If Lauren and Jon bought 50 acres how many Hectares did they buy if 1 acre = .405 Hectares? 20.25 Hectares Using the above question and answer how many square miles is their land if 1 mi^2 = 640 acres? How would I set this part up

Can you check my problems? 1. Write the phrase shown using only numbers and symbols. The sum of thirty-six plus twelve divided by 4 = (36+12)/4 2. Evalute the following expression 36 + 12 / 4 = 36 + 3 = 39 3. Write an expression for the phrase below:

77. English

1. Where is the concert? 2. Where is the concert held? 3. Where does the concert take place? --------------------------------- Are they all the same in meaning?

78. Math

A sample of seawater contains 0.000245 g of sodium chlorate per mL of solution How much sodium chloride is contained in 50.0 mL of this solution

79. Math

5/4x-2/3y=3 1/4x+5/3y=6 What is the (x,y) solution? I got (4,3). Is that correct?

80. science

how is scientific method applied in healthcare

81. algebra 2

The formula for the height,h, of an equilateral triangle is h= √3/2s, where s is the length of the following A.In terms of the length of a side,s, only B. In terms of the height,h only

82. Math

You need adobe flash player to access the link. The learn alberta username is LA57 and password is 2149. Go to T4T courses, put grade 11 then math. Then the resources show up. Click 20-1 learn everywhere. I need help on the Mars Rover Simulation questions.

83. Math

On a roller coaster the velocity is 13ft per second how do I figure out speed, need to give in units

84. Math

The number of 3 digit odd numbers with no repeated digits is?

85. Math

Diegos class planning a field tripfor 25 students.They will go to aquarioum and then to science museum. Each ticket for science cost \$2 more than each ticket to aquarium. Lunch for each student is \$5 additional. Write and expression for total cost of

86. Math

A group of students volunteers at the animal it helping feeds the dogs. Each day small dogs eat 1/2 cup less dog food than medium sized dogs and large dogs eat 3/4 cup more dog food than the medium sized dogs. The shelter currently has 22 small dogs, 14

87. Math

Pedro is making cards for a game. Each type of card will be a different color. The suits will be hearts and flags. In each suit, there will be 3 sets: numbers, letters, and symbols. How many colors will there be?