1. Physics

You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.5 m above the ground, and it is moving at a speed of 8.0 m/s. (a) How much time does it take for the tennis ball to reach its maximum height? (b) What is the

2. English 10

This poem describes a train as if it were a horse. Examine the imagery of the stanza in bold. What does it describe? A) The rumbling a train makes as it passes by B) The smell of train tracks after a train has gone C) The sound a train makes as it blows

3. English

My father was a hard working man but didn't earn much money. Is this sentence correctly punctuated?

4. Math

A pilot flies in a straight path for 1 h 30 min. She then makes a course correction, heading 10 degrees to the right of her original course, and flies 2 h in the new direction. If she maintains a constant speed of 655 mi/h, how far is she from her starting

41. CHEM 1A

Can someone please help me..... I have limited reactant formula problem. I am completely lost. 2Ca(s) + O2(g) ----> 2CaO(s) Calculate the mass of Calcium Oxide that can be prepared from 6.87g of Ca and 4.58g of O2. I calculated 2Ca to .171mol and O2 to

42. Pre-Cal

There exist two complex numbers c, say c1 and c2, so that 2 + 2i, 5 + i, and c form the vertices of an equilateral triangle. Find the product c1 c2. I need help

43. Physics II

What is the sign and magnitude of a point charge that produces a potential of -2.00 V at a distance of 3.00 mm?

44. physics

In reaching her destination, a backpacker walks with an average velocity of 1.22 m/s, due west. This average velocity results, because she hikes for 5.61 km with an average velocity of 2.69 m/s due west, turns around, and hikes with an average velocity of

45. Chemistry

A farmer supplies 1250.0 kg of a fertilizer that contains 10& nitrogen to his fields each year. Fifteen percent of the fertilizer washes into a river that runs through the farm. If the river flows at an average rate of 0.165 cubic feet per second, what is

46. physics

A flat circular plate of copper has a radius of 0.278 m and a mass of 42.6 kg. What is the thickness of the plate? answer in units of m

47. college algebra

A large rectangular movie screen in an IMAX theater has an area of 7200 square feet. Find the dimensions of the screen if it is 10 feet longer than the width.

48. physics

Two objects with masses 2.0 and 3.0 kg move toward each other, both with speeds V0 = 5.0 m/s. They collide head on and stick together. (a) Calculate their final velocity. (b) Calculate the amount of kinetic energy lost during the process. (c) Suppose the

49. Physics

A wooden bridge crossing a canyon consists of a plank with length density λ = 2 kg/m suspended at h = 10.0 m below a tree branch by two ropes of length L = 2h and with a maximum rated tension of 2000 N, which are attached to the ends of the plank, as

50. chem help plz

While in Europe, if you drive 125km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 22.0mi/gal ? Assume that 1euro=1.26dollars.

51. American Constitution Law

Please help with this Law question: If a criminal defendant goes to trial but the case ends with a hung jury, can the government retry the defendant on the same charges? Why or why not? A. No. The double jeopardy clause prohibits it. B. No. The double

52. Geometry

Find the indicated values. Please correct me if I'm wrong! 1. B is between A and C. AB=2x+1, BC=3x-4, and AC=62. Find the value of 'x' and determine if B is a bisector. X=13 Is it a bisector? Yes 2. M is between L and N. LM=7x-1, MN=2x+4, and LN=12. Find

53. Amrican Constitutional Law

Police obtain a search warrant for Mary's house to search for cocaine. While executing the search warrant, the police look in a closet and find a sawed-off shotgun. The gun will be: A. admissible if it was immediately apparent as contraband. B. admissible

54. Geometry

Points EC bisects points AD at C. For each of the following, find the value of 'x' and the measure of the indicated segment. Please correct me if I'm wrong! 1. AC= 3x+6 and CD=2x+14 x=_______ AC=______ Answer: x=8 AC= 30 2. AC= 5x-8 and CD=16-3x x=______

55. MATHEMATICS

3 friend's A,B,C went for weekend party to mc Donalad's restruant and there they measure their weights in some oder in 7 rounds. A,B,C,AB,BC,AC,ABC. Final round measure is 155 kg then find the average weight of all the 7 rounds.

56. Calculus

Two points P and Q are connected by a straight road of length d. At time t = 0, a car starts driving from P to Q at a constant speed c. At t = 0, a bee starts flying from Q toward the car at a constant speed b > c, and takes a zig-zagging path, reversing

57. Chemistry

How many molecules of PbCl2 are produced when 5.00 g of Pb(NO3)2 reacts with HCl?

58. physics

A skateboarder shoots off a ramp with a velocity of 6.4 m/s, directed at an angle of 54° above the horizontal. The end of the ramp is 1.4 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the

59. English/Grammar help

The sentences below have transitive verbs so each verb has a direct object. Read each sentences and underline its direct object. (Underline the subject once, and double underline the action verb and circle the do.) please correct me if I'm wrong! 5. He

60. science

How far does your automobile travel in meters during your reaction time if you are moving at 55 mi/h (25 m/s)?

61. Physics

A ball is thrown vertically upward from the ground with a speed of 36.0 m/s.Suppose the acceleration of gravity were only 2.00 m/s^2 instead of 9.80 m/s^2 a)At what time does it have a velocity of 12.0 m/s upward? b)At what time does it have a velocity of

62. Algebra III

How do I determine the dimensions of the following matrix product? A 2x3 * B 3x5 ??

63. physics

A spacecraft of mass 3.5 x 102kg was moving at 1.5 x 102ms-1 when its motor, operating at 8.4 x 102 kW fired for 5.0s Find the new velocity acquired by the spacecraft I don't know how to find the new velocity i found the work Power = w/t 840 x 5 = W 4200J

64. Math

A tank is filling with water from a natural spring. Two days ago the water was 10 feet deep, and yesterday the water was 12 feet deep. Assume that the water depth continues to rise at this same rate after today

65. Chemistry

determine the location of the non significant zeros by rewriting the number and placing a bar over the zeroes that are not significant. 1. 8040 2. 4.2 x 10^5 3. 4.70 x 10^-6

66. English

how do I start an Auto Biography? I mean what sentence should i start it with?

67. ANALYTICAL CHM

Describe the correct technique for reading the meniscus of a solution in the buret.

68. english

2. In "The Censors," it is ironic that the Censorship Division doesn’t bother to check Juan’s __________ before hiring him. (1 point) mail references health pockets

69. statistics

A survey was conducted at a school to determine how many students use the outside recreational areas for studying versus recreational. Out of 43 students at the park 25 students were not studying. What is the probability that you would come across a

70. Chemistry

A 14.0 kg sample of lead is measured out at 4 oC. Using the table on page 34, what is the specific gravity of lead?

71. Chemistry

A 14.0 kg sample of lead is measured out at 4 oC. what is the specific gravity of lead?

72. English

The sentences below have transitive verbs so each verb has a direct object. Read each sentences and underline its direct object. (Underline the subject once, and double underline the action verb and circle the do.) please correct me if I'm wrong! 1. Sam

73. geometry help needed.

I have a rectangle here with triangles inside. some triangles are blank others are shaded. -The area of the rectangle ABCD is 40in^2. What is the area of the unshaded region?

74. Math

When you calculate a mean, the sign of the quotient always depend on the sign of the dividend. Why?

75. ANALYTICAL CHM

What are the possible sources of error in using a graduated pipet? in using a buret?

76. Math

What would be the new ordered pairs of reflecting the points (-1, 5), (-2, 2), (3, 2), and (2, 5)?

77. Chemistry

Give the number of significan figures and decimal places in each of the following: 1. 80750 X 10^-2 2. 9.9000 X 10^8 3. 30.366 X 10^4 cm^3 4. 0.11692 X 10^-5

78. math

A Norman window has the shape of a rectangle surmounted by a semicircle. If the perimeter of the window is 16.200 ft. give the area A of the window in square feet when the width is 3.000 ft.

Find the equation of the parabola with directrix x + 1 = 0 and y = 1, and the length of the latus rectum is 4. Sketch the graph.

80. Physics Help!!!!

Describe what it means (describe the motion) if the acceleration vector has the same direction as the velocity vectors, and what it means if the acceleration vector has the opposite direction as the velocity vectors. Consider all four possibilities and

81. Algebra

Suppose that A = D + E and that D/A = 0.80. Solve for D/E. These are the steps I have taken, but I don't know how to proceed. 1. Divide A = D + E by A. 2. 1 = .80 + E/A 3. .20 = E/A 4. A/A = 1, D/A = .80, E/A = .20.

82. chemistry

In the electrolytic refining of copper, write equation for the reaction of the impure copper.

83. math

A triangle having three equal sides is necessary and sufficient for a triangle having three equal angles

84. math

what is the reciprocal of 8??? i don't get how to do it.... can someone explain it???

85. Law of Sines

In Triangle ABC, a=15cm, c=9cm, and angle C= 35 degrees. Find b and angle b. (Recall sin theta= sin (180 degrees-theta). I'm not sure how to approach this.

86. maths

10th term of series 25+27+29........is

87. COORDINATE GEOMETRY

A RAY OF LIGHT ORIGINATES FROM A(1,2) AFTER REFLECTION ON X-AXIS AT POINT A REFLECTED AT POINT Q(5,3). FIND COORDINATE OF A

88. visual arts

What are the 7 principles of design

89. Chemistry

A gold cube that measures 3.00 cm on each side is lowered into a volumetric cylinder that has an initial reading of 5.75 mL. What will be the new water level?

90. Chemistry

A gold nugget that weighs 20.053 g on the balance is lowered into a graduated cylinder filled with ethanol. If the initial ethanol level was 10.10 mL, what will the final ethanol level be?

91. Math

Use ,or = |-8| _ -9 |-7| _ -8

92. Physics for Technology

I have been out of school 27 years; no Algebra or Trigonometry training: only remedial math. This class is part of a Diploma program, no placement test required - I am out of my depth. I had a tutor for an hour last Tues., with another appt. this Tues.

93. Math

The air temperature is -10 degree Celsius. With the wind blowing at a speed of 15 km/h, this temperate feels like -17 degrees Celsius. How many degrees does the temperature change because pf the wind chill?

94. MATH HEL PLZ!!!!

what is the reciprocal of 8??? i don't get how to do it.... can someone explain it???

95. science

What are macro-nutrients?

You play your Xbox 360 every day for a month. Each week you realize that every time you play, your battery lift goes down by 5% each week. Say you don’t play for two weeks, how much %___ are you saving a week by not playing.

98. government

favorite theory of government? background information: how i would pursuade ppl those who have different opinion might say: i response i would say:

99. math

Write an equation which models how old in years each of you will be when you are three times as old as the younger person use age 10 and 48?

100. Algebra

What would be the new ordered pairs of reflecting the figure formed by (-1, 5), (-2, 2), (3, 2), and (2, 5)?

101. chemistry

what topics are under periodic chemistry?

102. chemistery

can you help me in elements and compounds?

103. AP CAlc. AB

limit x->0 (3k+k(x^2) sin(1/x)), if k is a positive constant