1. physics

if a car generates 18 hp when traveling at a steady 88 km/h, what must be the average force exerted on the car due to friction and air resistance

2. physics

A merry-go-round in a playground has a mass of 200 kg and radius of 1.50 m. You apply a force F = 23 N tangentially to the edge of the merry-go-round for a time of 6.5 s. The moment of inertia of the merry-go-round is 1/2(mR2). What is the angular

3. trig

If θ is an angle in standard position and its terminal side passes through the point (20,-21), find the exact value of sec(θ).

4. Chemistry

Suppose you have two solutions to titrate with NaOH: (a) 10 ml of.1M HCL (b) 10 ml of .1M CH3COOH would you expect either of the solutions to require different volumes of NaOH in order to reach an end point? Explain

5. chemistry

A 0.12-mole sample of nitrogen gas occupies a volume of 2.55 L. What is the volume of 0.32 mol of nitrogen gas under the same conditions?

6. Math

Determine the maximum and minimum number of turning points for the function h(x) = -2x^4 - 8x^3 + 5x -6. Maximum:3 Minimum:1 Is this a valid reason: A quartic polynomial function has a 3 Turning points. The turning point is always 1 less than the degree.

7. Physics

Candona strikes a 0.055-kg golf ball with a force of 260 N. If the ball moves with a velocity of 65 m/s, calculate the time the ball is in contact with the club.

8. CHEMISTRY

What is the intermolecular force that exists between a magnesium ion and a hydrogen sulfide? A dipole dipole b london dispersion c ionic bond d ion dipole e ion ion

9. 1 Credit for HS

How to earn one credit for high school? Last year when the whole 6th grade visit our middle school (we have 2 middle schools in our district, my friends and other people are going to that middle school but since I'm not going to that middle school the

I'm supposed to choose how the italicized noun clause is used. Not so sure about the different types of noun clauses.. can someone help me? & also kinda explain the difference? 1. The chairman heard [what was said about the program.] S OP PN DO 2. A good

37. math

A certain kind of bacteria doubles in quantity every hour. At midnight two nights ago. only two of these bacteria were in a jar. At midnight last night, the jar was full. At what time was the jar half full?

38. Chemistry

Apply the gas laws to determine how many grams of sodium azide (NaN3) are needed to fill the air bag of your vehicle to a volume of 79.0 L at 35.0 degrees celsius and 1.00 atm. The reaction occurring in the air bag can be repesented by the equation, 2NaN3

39. science

Compound A is provided as a 500mM solution. If 12.5 mL is taken and added to 12.5mL of water, how many moles (or millimoles / micromoles) are there per 0.1mL of the diluted solution?

40. Physics

A reversible heat engine operates between thermal reservoirs at 1000 K and 290 K. If 8610 J is extracted from the hot reservoir, how much work is done by the heat engine?

61. physics

A motor cyclist travelling at 12m/s decelerates at 3m/s^2. (a)How long does he take to come to rest? (b)How far does he travel in coming to rest?

62. algebra

amys bowling score in her 3rd game was 10 less that her score in her first game and 5 more than her second game. The total points of all 3 games were 275. What is the highest number of points she could have scored in her first game?

63. algebra

The amount spent worldwide in advertising on mobile devices can be estimated by f(x) = 0.4x2 + 0.01x + 0.9, where x is the number of years after 2005 and f(x) is in billions of dollars. b)When will worldwide mobile ad spending reach \$41 billion?

I am supposed to state how the italicized noun clause is used, but I'm not sure how to tell the difference.. can anyone help? 1. [What I wanted to do] was to finish my work. S

65. math

The track coach plans to make 8 lanes each 1-meter wide on the running track. The track measures y meters along the inside curb. The track has straight parallel sides and semicircular ends. If the runners in a race lined up at the same spot and stayed in

66. social studies

i need help in choosing a topic for my social studies fair, i am in the 6th grade i love sports, football especially.

67. Physics2

2 blocks are in contact on a horizontal table. A force is applied on the first block at a 30* angle. The blocks move to the right side. If m1 = 2kg and m2 = 1kg and F = 6 N kinetic friction at the middle of the 2 blocks and the table = 0.250 Find the

68. trig

If (cosa-sina)/sina = 2 , then what is tga = ?

69. pre calc

My teacher asked for the EXACT VALUES of sin(pi/6) cos(pi/4) csc(pi/3) I have to figure it out without a calculator? Also, if I was to do with it with a calculator, would csc be typed as 1/sin?

70. geometry

THE DIGONAL OF A CUBE MEASURES 33cm.Find the surface area and the volume of the cube

71. Math

Three different numbers are chosen at random from the set {1,2,3,4,5}. The numbers are arranged in increasing order. What is the probability that the resulting sequence is an arithmetic sequence?

72. calculus

The width of a rectangle is measured as 12.3 cm, while the length is measured as 28.8 cm. The width measurement could be off by 1.2 cm, and the length could be off by .04 cm. Estimate the maximum possible error in calculating the area of the rectangle.

73. vocbulary studies

i have choosen korea is this a good introduction for my brief history of korean language. what is a korean language? korean is one of the worlds oldest living languages.there are about 78 million korean speakers worldwide.korean is spoken by the korean

74. Chemistry

What is the volume of a scuba tank if it takes 2000 L of air collected at 1.00 atm to fill the tank to a pressure of 150 atm? T is constant.

75. precalculus

Determine the maximum and minimum number of turning points for the function h(x) = -2x^4 - 8x^3 + 5x -6. Maximum:3 Minimum:1 Is this a valid reason: A quartic polynomial function has a 3 Turning points. The turning point is always 1 less than the degree.

76. algebra

List all possible or potential rational zeros for the polynomial below find all real zeros of the polynomial below and factor completely over the real numbers. f(x) x^4 + 10x^3 + 12x^2 - 58x + 35 Someone anyone?????

77. physics

The wheel of a car has a radius of 0.390 m. The engine of the car applies a torque of 466 N·m to this wheel, which does not slip against the road surface. Since the wheel does not slip, the road must be applying a force of static friction to the wheel

78. algebra

the ordered pairs (2,3), (2,6) and (6,6) are coordinates of three of the vertices of a rectangle. What are the coordinates of the ordered pair that represents the fouth vertex? (3,6), (6,3), (3,2) or (3,3)

79. physics

Suppose 0.0210 kg of steam (at 100.00°C) is added to 0.210 kg of water (initially at 19.5°C.). The water is inside a copper cup of mass 48.9 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside

80. physics

A 1.41-kg aluminum pot contains 2.25 L of water. Both pot and water are initially at 17.5°C. How much heat must flow into the pot and the water to bring their temperature up to 92.7°C? Assume that the effect of water evaporation during the heating

81. Math

A circular piece of wire has a radius of 12 cm. This is cut then bent to form an arc of a circle whose radius is 60 cm. Find the angle subtended at the centre by this arc. Give your answer to the nearest degree. Please show working out Thank you so much!

Please help me with the questions? 1) How do you respond to some stimuli in your environment? The examples I wrote are: If I am hungry, I will eat food. If I am cold, then I will put on a jacket? 2) What does the fur of a bear have to do with homeostatis?

83. Confuses how my teacher got this?

The question says "Given that cos(theta)=(-7/25) and sin(theta)>0, calculate the exact values of tan(theta) and csc(theta). We start out by drawing a triangle. 25 is on the side of the hypotenuse and -7 is on the adjacent side, because cos is adjacent over

84. physics

Suppose 0.0210 kg of steam (at 100.00°C) is added to 0.210 kg of water (initially at 19.5°C.). The water is inside a copper cup of mass 48.9 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside

85. US History

Flow chart. One Box then two boxes then 6 boxes. The words are: Freedom of Religion Freedom of Speech Involvement in Government Obey The Law Respect the Rights of Others responsibilities right to vote rights. Don't know how to put the flow chart together.

86. Physics

I am second guessing myself A 4 kg block and a 45 kg block are placed side-by-side at the top of a frictionless ramp. Each is given a very light tap to begin their race to the bottom of the hill. In the absence of air resistance a. the 4 kg block wins the

87. Science/Physics

Your car has been setting out in the hot summer sun all day. The metal hood, the glass windshield, and the fabric upholstry are all at 180 degrees farenheit. If you touch the hood with your hand it could be burned, if you touch the windshield it will be

88. Chemistry

The combustion of methane can be described by the equation: CH4 (g) + 2 O2 (g) -> CO2 (g) +2H20 (g) If 22.0 mL of CO2 (g) were collected, what volume of H20 (g) also could be collected under the same conditions?

89. science

NaOH has a MW of 40. A 0.12M solution is made by adding how much NaOH to 100mL of water?

90. writing

My son is 3yrs and 6months old he is facing problem in writting small alphabets would u plz help me ,how i teach him :)

91. precalulus

use the intermediate value theorem to show that f(x) has a zero in the given interval. f(x) = -x^5 -2x^4 + 5x^3 + 4; [-0.9, -0.8] Stuck!

92. math

The cost price of 400 lemons is equal to the selling price of 320 lemons. Then the profit percent is

93. English

Could you please check if the following sentences are possible? Thank you. 1) Did you watch TV last night? Yes, I watched a new drama series and last night was the first episode. 2) Last night they broadcast the first episode (possible?) 3) What was it

94. Lab

Neither carbon tetrachloride nor trans CHBr=CHBr have dipole moments. Both have cery different molecular geometries. What are their molecular geometries, and why are they different?

95. physics

The mass of the Mars is about 0.11 the mass of the earth, its radius is 0.53 that of the earth, and the acceleration due to gravity at the earth's surface is 9.80 {\rm m}/{\rm s}^{2}.

96. Algebra 1

what is the equations "The sum of two numbers is 75. The first is 9 more than 5 times the second. Find the first number?" What is the equations "Jack's bowling score is 20 less than 3 times Jill's score. Thw sum of their scores is 220. Find the score of

97. math

Rodney need 3/4 of a roll of wrapping paper to wrap 5 gifts. How much wrapping paper does it take to wrap two gifts?

98. physics

the distance between the marks of 0 degree centigrade and 100 degree centigrade is 12cm and if the level of mercury thread is at 4.8 cm then what would be the temperature in celsius scale?

99. physics

A former amusement park attraction consisted of a huge vertical cylinder rotating rapidly around its axis. The rotation speed should be sufficient for the people found inside to be stuck to the wall when the floor was removed. what should be the minimum

100. Algebra

What is the equation of the line having the specified slope and contained the indicated point. M=-3/5;(12,-6)

101. Physics (verification)

I would love for someone to please verify my solution for this problem: A former amusement park attraction consisted of a huge vertical cylinder rotating rapidly around its axis. The rotation speed should be sufficient for the people found inside to be

102. statistics

Write the null and alternative hypotheses. Justify which is the claim. A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is less than 900 hours

103. English

In "How to Build a Fire" what is the answer to this question? Aristotle described various plots. Combining them, we get a tradtional definition of an ideal tragedy. How does this story compare to this traditional ideal of a Greek tragedy? It fits the ideal

104. physics

if the force of friction on a sliding scaleis 25n the force to maintain the constant velocity is

105. vocabulary studies

im suppose to write an essay of a non indo european language of my choice is there any other besides japenese korean swahili it has to be a 2-3 page essay

106. math

an average sized female spider and a large spider can lay a total of 2,100 eggs at one time.The large spider lay 20 times the number of eggs as the average sized spider.How many eggs does the average sized spider lay?

107. algebra

solve the following in the real number system x^3 + 8x^2 + 10x - 15 = 0 Please help me!

108. algebra

Use the given information about a polynomial whose coefficients are real numbers to find the remaining zeros. degree: 6 Zeros: -8 + 11x(can't put this sign in looks like ii with slash over)i, -7 + 17i, 16 - isqrt 2

109. Pre-algebra

State a definition of a polynomial in the x. Give an example of a monomial, a binomial and a trinomial. Thank you.

110. Question

In college application when they ask Rigor of secondary school record do they means what I did in middle school???

111. physics

a rock with a mass of 6.0 kilograms is being whirled in a horizontal circle on the end of a rope 1.6 meters long. if the speed of the rock is 2.7 meters per second, what is the magnitude of the centripetal acceleration

112. math

The length of a rectangle is one more than seven times the width. The perimeter of the rectangle is 26 7/8 square inches. Find eight times the width.

113. PRE-CALC

sin(arctan(-4/3) okay so i made arctan(-4/3) = x so im solving for sin(x) and x= arctan(-4/3) so then tanx = -4/3 and now im stuck i don't know what to do after that

114. algebra

how do I solve F = 5/9 (F-32) ?

115. Algebra

Algebraically at what temp is Celsius 1/4 that of Fahrenheit?? ie C = 1/4 F

116. physics

A copper sheet of thickness 2.09 mm is bonded to a steel sheet of thickness 1.35 mm. The outside surface of the copper sheet is held at a temperature of 100.0°C and the steel sheet at 26.3°C a) Determine the temperature (in °C) of the copper-steel

117. Math

State the exact values of the following. cos(360 degrees) sec(7pi/2) tan(-9pi/2) How do I do these? Thanks!

118. Calc

Calculate the exact values of sin(theta) cos(theta) and tan (theta) when theta=240 degrees. How would I do this with and without a calculator?

119. science

Why are proteins necessary in your body? What are polymers that build up to make proteins?

120. wold history

i need pennfoster text answer for text 007679

121. science

Compound C (MW = 550) is provided at a concentration of 25g/100mL. 1mL is taken and compound D is to be added (MW = 1025, concentration = 75mM) to give a final ratio of compound C:D of 4:1. What volume of compound D is to be added?

122. precalculus

Determine the x-intercepts of the polynomial function y=-6(x+7)^4 + 5. Round to two decimal places, if necessary. y=-6(x+7)^4 + 5 0=-6(x+7)^4 + 5 -5=6(x+7)^4 -5/6 =(x+7)^4 There are no x-intercepts??

123. Math

How much meters are in 7 1/2centimeters

124. pre cal

g(x) = x^2 - x -12 / x + 1 I know the division brings it to x -2 + -10/x + 1 but these are the steps I have to follow 1. factor the numerator and denominator and find its domain. ( I know 0 is not in domain) 2. write in lowest ermas as p(x)/ q(x) and find

125. English

I left out a few sentences I urgently need you to check. Thank you. 1) The programme was first broadcast in 2004.(Can you also say: the fist time it was broadcast was...) 2) They lived building homes from the trees and eating the food which was on the

126. English

Hello. I'll be very grateful for your help. 1) Is it possible to use "security maintenance" in the sentence: "The country has made progress in security maintenance" or is it better to say "in maintaining security"? 2) Is the sentence correct: "The

127. english

In what ways is Hedda Gabler the hero of Hedda Gabler by Henrik Ibsen?

128. Computer help!!!

Is 15.30 mbps good download speed? Also is 15 ms ping good and 0.40 mnps upload speed?

129. Science/Physics

Your car has been setting out in the hot summer sun all day. The metal hood, the glass windshield, and the fabric upholstry are all at 180 degrees farenheit. If you touch the hood with your hand it could be burned, if you touch the windshield it will be

130. English

Could you please check these definitions? Thank you very much in advance. 1) The programme was very good (is "nice" possible?) An episode is a part of a long TV series. 2) An episode is one of the several parts of a story. An advert is a short film which

131. Top Schools

Is Clarkstown North or South HS is one of the top best high schools?????? My dad wants me to go to that school after middle school if we won the lottery and move.

132. science

What is the net force on a box that is being pushed to the left with a force of 50 N while it is also being pushed to the right with a force of 60 N

133. Precalc

Determine the x-intercepts of the polynomial function y=-6(x+7)^4 + 5. Round to two decimal places, if necessary. y=-6(x+7)^4 + 5 0=-6(x+7)^4 + 5 -5=6(x+7)^4 -5/6 =(x+7)^4 There are no x-intercepts?? No one has answered this question yet. Answer this

134. Question

I'm partcipating in the Doodle 4 Google Competition and like do I have to mail my project in with the entry form???

135. math

What kind of triangle has the angle measurement of 49,53,78

136. physics

A 4 kg block and a 45 kg block are placed side-by-side at the top of a frictionless ramp. Each is given a very light tap to begin their race to the bottom of the hill. In the absence of air resistance a. the 4 kg block wins the race. b. the 45 kg block

137. math

Find the 265th term of an arithmetic sequence whose second term is 5/8 and whose 9th term is 71/24 pls help asap

138. Math

Convert to degrees: (5pi/8) How would I do this?

139. calculus

Find the critical number of g(t)=(t^2)/(5t+4)

140. physics

A 1.67-kg block of aluminum at 21.7°C is to be melted and reshaped. How much heat must flow into the block in order to melt it? use the following values: For copper: c_copper=0.386 kJ/kg.K T_fusion=1359 K L_fusion=205 kg/K For aluminum: c_aluminum=0.900

Calculate the exact values of the cot(theta) and sin(theta) for the acute angle theta if sec(theta)= the square root of 6. Thank you so much!

142. physics

What is a car average acceleration if it slows down from 22ms to 15.7 m/s in 2.15 s?

143. Personal Finance

What are 4 major consumer credit laws?

144. science

One kg weighs 9.8 N on Earth. Would it weigh more or less on the Moon?

145. South America

1. Under America's second party system, the Whigs stood for A. policies that kept government hands off business and industry. B. policies that directly supported commercial enterprises. C. a "negative liberal state." D. a "liberally negligent" state.

146. math

is the mean or median a better estimate for the parameter of interest?

147. chef school

You are given a recipe that feeds 100 1 cup servings. Describe the steps you would take to convert the recipe to 1350.

148. accounting

What is the acid test ratio? Is it the same thing as the quick ratio?

149. physics

how do we calculate the height of a falling ball with a mass of 0.5kg and a velocity of 10m/s.

150. algebra

9z^2+24z+16/6z^2+5z-4

151. integral calculus

evaluate integral by substitution (e^x-e^(-x))/(e^x+e^(-x))dx

152. Family Law

A __________ agreement can be used by same-sex couples in all states. (Points: 5) prenuptial postnuptial premarital cohabitation Is it "D"

153. math

simplify 144+(-317)+213 =?

154. science

Compound B is provided as a solution and has a specific gravity of 0.65 (Specific gravity is the weight in grams per mL of solution) and is known to be 90% pure (each gram of compound B solution only contains 90% Compound B and 10% of degradation

155. Math

Marla has 3 secret code cards. The first shows a 37. The second card has the first box blanked out and the second box is a 2. The two code cards together equal the third card which is 59. Why is the missing number?

156. History

What famous mob boss aka Scarface was convicted of tax evasion in 1931?

157. biology

Relationship between free energy change and metabolism in biological system

158. Question

What is Yale looking for a student????

159. English

Could you please help me check these few sentences? Thank you. 1) I'm happy our head science teacher is so enthusiastic to carry out a project with your and the French school. 2) I read you both agreed to hold the meeting on 27 January and that you are

160. Pre-algebra

How would I explain to my friend why the quotient of x^8 and x^2 is x^6 and not x^4. She is questioning the rule. How do I explain?

161. Maths

The diameter of a ball bearing is to have an average of 2.0 Cm. A random sample of 10 bearings is selected every hour to check the diameters. The sample selected at 9 a.m. gave the following measurements: 2.02, 2.04, 2.00, 1.98, 1.98, 2.04, 2.04, 2.00,

162. us history

what do you think were the 15 most important events in us history between the founding of jamestown(1600's) and the end of the great depression (1930's)???

163. physics

Samuel travels to the east at 15m/hr for 20 minutes. Then hevtravels 30 degrees north of east 2m/s for 15 minutes. What is his displacement?

164. algebra

what is the least prime number between 80 & 90?

165. SCIENCE

WHAT ARE THREE PARTS OF STRANDS

166. math

is 3 times 6 18 am i correct?

167. Essay

Is there any essay contests for 2012 (that are due in 2012)???????

168. Chemistry

A sample gas is 3.7 L at 15.3 degrees C and the pressure is held at constant. What would be the volume if the temp was raised to 153 degrees C?