# Questions Asked onFebruary 9, 2014

1. ## Physics

You are driving through town at 12m/s when suddenly a ball rolls out aim front of you. You apply the brakes and begin decelerating at 4ms^2. How long does it take you to stop? The answer I got is -3 is that possible!!!!??! I'm not sure what doing wrong.

2. ## Physics

A golf ball is released from rest from the top of a very tall building. Choose a coordinate system whose origin is at the starting point of the ball, and whose y axis points vertically upward. The acceleration of gravity is 9.8 m/s^2. a.Neglecting air

3. ## physics

A cue ball initially moving at 2.6 m/s strikes a stationary eight ball of the same size and mass. After the collision, the cue ball’s ﬁnal speed is 1.3 m/s.Find the cue ball’s angle θ with respect to its original line of motion. Consider this to be

4. ## math

Brett made a scale drawing of a rectangular room in his house. The actual length of the room is 12 4/5 ft. The scale used to make the drawing was 1/4 in.=1 ft. What is the length, in inches, of the room on the drawing?

5. ## Physics

Oasis B is a distance d = 7.0 km east of oasis A, along the x axis shown in the figure. A confused camel, intending to walk directly from A to B instead walks a distance W1 = 22 km west of due south by angle θ1 = 15.0°. It then walks a distance W2 = 34

6. ## Science

What did Antoine Lavoisier’s experiments demonstrate? a- Atoms always split into pairs during a chemical change. b- Mass is neither lost nor gained during a chemical change. c- Matter can be created during a chemical change. d- Energy is neither lost nor

7. ## Physics

If a salmon swims straight upward in the water fast enough to break through the surface at a speed of 5 meters per second, how high can it jump above water?

8. ## MATH?!!?

a store sells ladders. . the retail price was a 40m percent markup over the manufacturer price. .a month later, the store reduced the retail price of the ladder by 25 percent What percent markup is the new retail price over the manufacturer price?

9. ## Geometry

A ladder leaning against a house makes an angle of 60 degrees with the ground. The foot of the ladder is 7 ft from the house. How long is the ladder?

10. ## math!!!!

One lap around the track is equal to 1/8 of a mile. A horse ran a distance of 9 laps in 2 minutes and 30 seconds. What was the horse's average speed in miles per minute?

11. ## physics 1

Only two forces act on an object (mass=4.00 kg), as in the drawing. Find (a) the magnitude and (b) the direction (relative to the x axis) of the acceleration of the object.

12. ## science

Which type of mechanical energy do the following contain? Kinetic Energy, Potential Energy, or Both A Car traveling at 100 mph along a flat road - KE A rubber band that has been stretched - PE A bowling ball rolling down a lane - both A piano lifted to a

13. ## phys

An object with an initial velocity of 12 m/s west experiences a constant acceleration of 4 m/s^2 west for 3 seconds. During this time the object travels a distance of:

14. ## statistics

The height of an adult male is known to be normally distributed with a mean of 69 inches and a standard deviation of 2.5 inches. The height of the doorway is 74 inches. What proportion of adult males will not fit under the door?

15. ## Physics

Police find skid marks 60 m long on a road showing where a car made an emergency stop. Assuming that the deceleration was -10m/s2, how fast was the car going?

16. ## English

Read the conversation at a peer review for Ben’s short story. “It seems your central character has a really cool power: being able to hear what others are thinking,” Tom said. “Actually, I think it was more of a jinx,” replied Ben. “Being able

17. ## math

A student has 4 English books,3 math books,and 5 history books.In how many ways can these books be arranged on a shelf if the books in same subjects must be kept together?

18. ## MATH

john mixed 3/4 liter of yellow paint with 1 1/4 liters of red paint to make 2 liters of orange paint. . He needed more orange paint. . To make a new batch of orange paint, he used exactly 1 liter of red paint. Using the same ratio, how many liters of

19. ## Chemistry HELP

Complete combustion of 3.30 g of a hydrocarbon produced 10.2 g of CO2 and 4.68 g of H2O. What is the empirical formula for the hydrocarbon? I did the calculation and the ratio comes out to C: 1 H: 2.24 So I thought the answer is CH2 but apparently its

20. ## statistics

Find the probability that among six randomly selected people, exactly four of them have brown eyes. Assume that 40% of the population has brown eyes

21. ## CHEMISTRY

4. The human eye is a complex sensing device for visible light. The optic nerve needs a minimum of 2.0 x 10-17 J of energy to trigger a series of impulses that eventually reach the brain. (a) How many photons of red light (700.0 nm) are needed? (b) How

22. ## physical science

Consider a 100-kg box of tools in location: A: on Earth B: on the Moon C: on Jupiter. Rank from greatest to the least the a) masses of the 100 kg box of tools and b) the weights of the 100-kg box of tools.

23. ## math;)

a kitchen is shaped like a rectangle with dimensions of 11 1/2 ft. by 9 1/2 ft. the floor of the room is made of square tiles with a side length of 1.2 ft. What is the number of tiles that will cover the kitchen floor?

24. ## CHEMISTRY

6. The H atom and the Be3+ ion each have one electron. Does the Bohr model predict their spectra accurately? Would you expect their line spectra to be identical? Explain.

25. ## physical science

A horizontal force of 100 N is required to push a box across the floor at a constant velocity. a) Show that the net force acting on the box is zero. b) Show that the friction force that acts on the box is 100 N.

26. ## Social Studies

What is the most likely result of incomes not rising as quickly as inflation? A. People are able to buy fewer goods and services. B. The unemployment rate rises as more people look for jobs. C. Many people decide to leave the labor force. D. Consumers buy

27. ## Organic Chemistry

Why is crotyl chloride more reactive than 1-Chlorobutane under SN2 conditions

28. ## Math

The combined math and verbal scores for students taking a national standardized examination for college admission, is normally distributed with a mean of 620 and a standard deviation of 220. If a college requires a student to be in the top 10 % of students

29. ## economic

6. The table below is a set of hypothetical production possibilities for a nation. Combination Automobiles(thousands) Beef (thousands of tons) A 0 10 B 2 9 C 4 7 D 6 4 E 8 0 a) Plot the production possibility data. What is the opportunity cost of the first

30. ## Science

which is a chemical property of aluminum a- melting point is 660c b- boiling point is 2519c c- does not dissolve in water d- reacts with oxygen My answer is D

31. ## economic

Suppose, unfortunately , your mathematics and economics professors have decide to give tests 2 day from now and you can spend only a total of 12 hours studying for exams .After some thought, you conclude that dividend your study time equally between each

54. ## intermediate algebra

A woman has a total of $9,000 to invest. She invests part of the money in an account that pays 5% per year and the rest in an account that pays 10% per year. If the interest earned in the first year is$650, how much did she invest in each account?

55. ## Science

what has a definite shape and volume a- solid b- liquid c- gas d- molecule My answer is A

56. ## Physics

You're driving down the highway at 20m/s when you see a dog you don't want to crush it 35 m in front of you. Your reaction time before stepping on the brakes is 0.5s, and acceleration created by your brakes is 10 m/s^2 what was the distance travelled

57. ## economic

The table below is a set of hypothetical production possibilities for a nation. Combination Automobiles(thousands) Beef (thousands of tons) A 0 10 B 2 9 C 4 7 D 6 4 E 8 0 a.)Plot the production possibility data. What is the opportunity cost of the first

58. ## Math :-)

Explain why knowing the height is needed when finding the perimeter of a right triangle.

59. ## Maths

Covert 200g cake flour to kilogram

60. ## O CHem

Why is crotyl chloride more reactive than 1-Chlorobutane under SN2 conditions

61. ## Physics

You're driving down the highway at 20m/s when you see a dog you don't want to crush it 35 m in front of you. Your reaction time before stepping on the brakes is 0.5s, and acceleration created by your brakes is 10 m/s^2 what was the distance travelled

62. ## science/physics

If a pendulum is not pushed, why does it not go as big when it swings back. Where does the lost PE go? ans. Since there is no force applied to the pendulum there is not enough Kinetic energy (energy of motion) to transform into potential energy to make it

63. ## Physics

A vector with a magnitude of 17.6 m is directed at angle θ = 43o counterclockwise from the +x axis. What are the components (a) ax and (b) ay of the vector? A second coordinate system is inclined by angle θ' = 20o with respect to the first. What are the

64. ## Social Studies

How are interest rates and wages similar? A. Both rise due to inflation B. Both are types of prices B

65. ## Algebra 2

Can someone please explain how to do this problem? Woodrow wins a tic-tac-toe game 65% of the time when he chooses the first square and 32% of the time when his opponent chooses the first square. The player who plays first is chosen by a coin toss. What is

66. ## Physics

A motorist drives north for 33.0 minutes at 77.0 km/h and then stops for 15.0 minutes. He then continues north, traveling 130 km in 1.80 h. a) What is his total displacement in km? b) What is his average velocity km/h?

67. ## chemistry

the correct formula for the ionic compound containing Tl^3+ and Te^2- ions would be: a. TlTe b. Tl3Te2 c. Tl2Te3 d. Tl2Te

68. ## Chemistry

Hi I was hoping to get some help on this. It's review for my chemistry text on Monday and I would be grateful if someone could help me out. My teacher has been out for two weeks but we still have to know this material. 1. The following data was collected

69. ## Physics

A sand bag is dropped out of a balloon traveling upward at speed of 2.3m/s. A kiddo drops a bag at the instant the balloon is 34m above the ground. How long does it take the sand bag to hit the ground? I got -2.41s why?

70. ## phyical science

A 250 g yo-yo is swung on the end of a 50 cm string at a constant speed of 4 m/s. The centripetal force acting on the yo-yo is

71. ## physics

a stone is thrown vertically upward with a speed of 10.5 m/s from the edge of a cliff 76.0 m high. how much later does it reach the bottom of cliff? what is its speed just before hitting? what total distance did it travel

72. ## Chemistry

6 separate questions. I have figured out the other 20 questions I am stuck. Please help Thanks The correct name for the ionic compound Al2Se3 is? The correct name for the ionic compound Fe2Se3 is? the Roman numerall III in the name Iron(III)oxice indicates

73. ## Algebra

The graph shows data from a recent satellite internet connection. The cost was 90 cents at 10 minutes, and 180 at 20 minutes. The connection service billed at a rate of how many cents per minute?

74. ## chemistry

Assuming that a neutron star has the same density as a neutron, calculate the mass in kilograms of a small piece of a neutron star the size of a spherical pebble with a radius of 0.30mm .

75. ## Physics

For the vectors with a = 3.3 and b = 2.2, what are (a) the z component of AxB, (b) the z component of AxC, and (c) the z component of BxC?

76. ## physics

A man is in a boat out away from shore. Th mass of the man, the boat and everything in it is 210 kg. The boat is not moving. The man throws and anchor with a mass of 26 kg straight out from the boat with a speed of 6.6 m/s. What is the resulting speed of

77. ## algebra

the current in an electrical conductor varies inversely as the resistance of the conductor. If the current is 12 ampere when the resistance is 240 ohms, what is the current when the resistance is 540 ohms

78. ## Physics

suppose you are standing on the edge of a cliff 400 m high and you throw 2 balls in the air: one (ball a) directly upward with a speed of 17.6 m/s and one (Ball b) directly downward with a speed 17.6 m/s. 1.) how high will ball A rise? 2.) How long will it

79. ## Physics

A particle moves according to the equation x= (10 m/s^2)t^2 where x is in meters and t is in seconds. a. Find the average velocity for the time interval from t1= 2.38 s to t2= 4.3 s. Answer in units of m/s. b. Find the average velocity for the time

80. ## physics 2 for college

a jet propelled motorcycle start from rest moves in a straightline with constant acceleration and covers a distance of 64m in 4seconds.?

81. ## Chem

What gas law explains why hot water diffused the food coloring faster than the cold water?

82. ## Chem

How many grams of CS2 can be prepared by heating 11.0 moles of S2 with excess carbon in 5.20 L reaction vessel held at 900 kelvin until equilibrium is attained?

83. ## math

how to solve linear functions f(x)= 2x if x greater than or equal to -1 x-1 if x less than -1

84. ## Physics

A boat takes 2.0hr {\rm hr} to travel 26km {\rm km} down a river, then 6.0hr {\rm hr} to return.

85. ## math

In a survey of 25 college students, it was found that 9 were taking an English class, 14 were taking a math class, and 8 were taking both English and math. How many students were taking a math class only

86. ## chemistry

With a halogen X, a metal M forms ionic compounds MX, MX2 and MX3. The lattice energies of the compounds are -1340, -3840 and -7020 kJ/mol, respectively. The ionization energies of the metal are 360 (for M+), 1236 (M2+) and 2990 (M3+) kJ/mol and the

87. ## Math Mixture Word Problem

How much water must be added to 1 liter of a 5% saline to get a 2% saline solution

88. ## AP Chemistry- Equilibrium

If 10.0 mL of 0.18 M MgCl2 are mixed with 20.1 mL of 0.56 M NaOH, what will be the final concentration of Mg2+ in solution when equilibrium is established? Assume the volumes are additive. Ksp = 1.2 ✕ 10-11 for Mg(OH)2.

89. ## Physics

In the sum A+B=C, vector A has a magnitude of 10.2 m and is angled 48.0° counterclockwise from the +x direction, and vector C has a magnitude of 15.0 m and is angled 22.0° counterclockwise from the -x direction. What are (a) the magnitude and (b) the

90. ## physics

A block of wood with a mass of 4.62 kg sits on the edge of a table that is 0.99 m tall. A bullet with a mass of 70.5 g traveling with a speed of 450 m/s is shot into the block and is lodged in it. Assuming that no energy is lost to friction, how far from

91. ## Physics

A boat takes 2.0hr {\rm hr} to travel 26km {\rm km} down a river, then 6.0hr {\rm hr} to return.

92. ## Chemistry

Find the mass of carbon dioxide that can be produced from 0.01 mols of calcium carbonate

asked by D.M.I st EUGENE UNIVERSITY
93. ## Maths

Calculate the simple interest on R3 500 invested at 6% per annum for 3 years

94. ## physics

Buffy is rolling along in her 11.1 kg wagon at 4.6 m/s (in the positive direction) when she jumps off the back. She continues to move forward at 1.5 m/s relative to the ground. This causes her wagon to go speeding forward at 13.03 m/s relative to the

95. ## Mathe

The number has two digits. Both of the digits are even.the digit in the tens place is greater that the digit in the unit (or ones) place.the units (or ones digit) is not in the three times table. The tens digit is not double the ones digit. The sum of the

96. ## physics

f the vertical initial speed of the ball is 4.0m/s as the cannon moves horizontally at a speed of 0.70m/s , how far from the launch point does the ball fall back into the cannon? What would happen if the cannon were accelerating?

97. ## ball state

Write the equation of the line passing through points (3, -2) and (6, 4).

98. ## Physics

Three vectors are given by a= 0i+0j+4.0k , b= 3.0i+ -3.0j+-1.0k and c=1.0i+2.0j+-1.0k. Find (a) a(bxc) and (b)a(b+c)

99. ## Physics

A calorimeter with specific heat of 490x10^2J/kg^1K^1 has a mass of 2.00x10^-1kg that contains 3.00x10^-1kg of liquid water at 40C. If 5.00x10^-2kg of ice at 0C is dropped into the water. Find the final temperature of the mixture where the ice has melted

100. ## physics

Buffy is rolling along in her 12.7 kg wagon at 3.6 m/s (in the positive direction) when she jumps off the back. She continues to move forward at 1.2 m/s relative to the ground. This causes her wagon to go speeding forward at 9.51 m/s relative to the

101. ## Science

Calculate the PH of and POH of the following solution and comment on them.(a)0.39 moldm3 of H2SO4(b)2.0 moldm3 of NaoH

102. ## English

Hello. I will appreciate it if you help me with a few questions. 1) Is it possible to say "protesters gathered ON the square" or is it IN or AT? 2) Is it necessary to use the article in the context: a) 'Pope Francis blessed (the?) pilgrims in St Peter's

103. ## Physics

suppose you are standing on the edge of a cliff 400 m high and you throw 2 balls in the air: one (ball a) directly upward with a speed of 17.6 m/s and one (Ball b) directly downward with a speed 17.6 m/s. 1.) how high will ball A rise? 2.) How long will it

104. ## math

The profit in dollars in producing x- items of some commodity is given by the equation P = - 40 x^2 + 1000 x - 5250 . How many items should be produced to maximize the profit? What is the maximum profit?

117. ## Strayer

Choose two dimensions, describe them, and explain the relationship between your chosen dimensions. Provide at least two examples to support your explanation.

118. ## math

rewritten as a power of 2 with a rational exponent, the expression 4*squared root of 2 would equal which of the following. 1) 2 so 2 is just 2 2)2^2 which would =4 3) 2^5/2 this =5.65 4)2^5 this=32 4*square root of two=5.65 so I believe the answer is 3. Is

119. ## Math

A rocket engine, 2.39 cross 10−5watts/cm2

120. ## algebra 1 help please ASAP

Divide and simplify. 1. 2y^2 - 7y + 3/2y^2 + 3y - 2 divided by 6y^2 - 5y + 1/3y^2 + 5y -2 2. x^2 + 13x + 12/x + 2 divided by (x + 1) Please explain! Thanks!

121. ## physic

Pere walked 4km east and 6km south.find the resultant displacement

123. ## English

Which verb should I use and why? Either the wild dogs or the baboon makes or make that howling sound. I think since dogs is plural it should be make?

124. ## algebra

a scarf was cut into 6 pieces, each with a length greater than 5 inches. How long could the original scarf have been?

125. ## chemistry

A 25.0-ml sample of 1.00M KBr and a 75.0-ml are mixed. The solution is then heated to evaporate water until the total volume is 50.0 ml. What is the Molarity of the KBr in the final solution

126. ## Science

Calculate the PH of and POH of the following solution and comment on them.(a)0.39 moldm3 of H2SO4(b)2.0 moldm3 of NaoH

127. ## math

Solve the set of linear equations by the matrix method:a+3b+2c=3,2a-b-3c=-8,5a+2b+c=9 sove for a

138. ## physics

passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is NOT true? The passenger is in motion relative to the passer-by The passer-by is stationary relative to the

139. ## English art

Please, critique this critique: Very dramatic interactions in a world novel to me, with canine preening for competitive exhibition, following the emotions of the lead characters is exciting. This is no "Dog story", and Lassie wouldn't be noticed in the

Design and develop a simple system that computes the Depreciation cost of the item (D). Takes as input the purchase Price of an item (P), its expected number of years of Service (S), and Yearly depreciation for the item (Y). Use the formula D= P-(S/Y).

141. ## Circuit and electronics

Here we analyze the time response of the circuit in Figure 3 which contains capacitive and resistive elements and a voltage source, VS. The voltage source is switched between two nodes in the circuit, and we observe the voltage response across C1. All

142. ## physics/science

If a pendulum is not pushed, why does it not go as big when it swings back. Where does the lost PE go? ans. Since there is no force applied to the pendulum there is not enough Kinetic energy (energy of motion) to transform into potential energy to make it

143. ## Physics

You buy yourself a new Lamborghini which can accelerate from 0 to 62 mph in 2.5 seconds. 1.) what is the magnitude of the car's acceleration in SI units? 2.)the latest figures on speeding related car accident fatalities show 32788 deaths per year in the

144. ## Pre Algebra

Hi, does anybody know what a quadrilateral in which opposite sides are congruent and parallel is? It's on a crossword puzzle on my math homework and is thirteen letters long and from the beginning the seventh letter is an E. Thanks so much to anyone who

145. ## Chemistry

iron has three main naturally occuring isotopes which can be investigated using a mass spectrometer. The first stage in the operation of the mass spectrometer is vaporization. The iron is then oxidized. Explain why the iron is oxidized. Explain why a very

146. ## history

What are three impacts of sit-ins?

147. ## INF 103

Digital literacy is a skill that is important for: utilizing computers effectively. counting numbers reading digits. hacking computer information.

148. ## physics

A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.840 m/s at an angle of 36.0° above the table, and it lands on the magazine 0.0710 s after leaving the table. Ignore air resistance. How thick

149. ## Physics

A ball thrown straight up at ground level passes a height of 115.7 m in 5.6 s. The acceleration of gravity is 9.8 m/s^2. What was its initial speed? Answer in units of m/s.

150. ## Calc

Consider the following: f(x)= the intergral of ((3-xe^x)/x )dx If the integration constant, C , is zero, then the value of f (1) is ????

17x-5-12x

152. ## Data apps and healthcare statistics

what are the categories of information systems, examples of each and their roles in the healthcare delivery

168. ## Alg 2

check for extraneous solutions. 0, 7^4 2^4, inside the equation x^5/6 = 9x^7/12 - 14x^1/3

169. ## Physics

A plane flies 407 km east from city A to city B in 44.0 min and then 871 km south from city B to city C in 1.90 h. For the total trip, what are the (a) magnitude (in km) and (b) direction of the plane's displacement, the (c) magnitude (in km/h) and (d)

170. ## physics

You have a coil with 20 loops inside a magnetic field generator that is temporarily generating a field that has a rate of change of -0.25. The other end of this coil is wrapped around a core with 15 turns. How many turns must a second coil wrapped around

171. ## English

1. Should I use a question mark or a period? I can't go today so would it work tomorrow( ) 2. Is this correct? I did WELL on the test. NOT I did GOOD on the test. WELL=ADVERB OR ADJECTIVE GOOD=ADJECTIVE

172. ## algebra & trigonometry

At a grocery store, the number of customers arriving per hour is shown by the function f(x) = 2x + 1. Find the number of customers that arrived in the 6th hour. Thanks

173. ## algebra & trigonometry

The profit of an organization is calculated by the function P(x) = x2 – 4000x + 7800000, where x is the number of units sold. If the net profit is 3800000, find the number of items sold. Thanks

174. ## math

lemon juice is 10 squared times as acidic as tomato juice . Tomato juice is 10 cubed times as acidic as egg white. How many times as acidic is lemon juice as egg whites? write as a monomial. how do I solve this

175. ## PreCalc

stacey is standing 5 miles west of the control tower at an airport. A plane took off traveling directly north of the control tower at a rate of 180 mph along the ground at a constant angle of 15 degrees. A)after 12 minutes, what is the angel between Stacey

179. ## Math

A bag of buttons contains 3 red, 4 orange, 7 green and 10 blue battens. How many orange buttons should be added so that makes up 1/4 of the total? (Remember, if you add more orange buttons, your total buttons will also increase.)

180. ## algebra

x^3+4a+5a^2x^6 ascending order

181. ## ENG1511

How to write an argument essay.

182. ## economics business studies maths literacy

which carrer can i choose

183. ## Eng1511

Paraphrase the sentence,"To cut a long story short one day idecided to be a man

184. ## SCI207

Net- zero refers to a building or installation that produces less energy less than consumes, considered to be energy reliant. True or false

185. ## Physics

A train at a constant 41.0 km/h moves east for 28 min, then in a direction 53.0° east of due north for 15.0 min, and then west for 64.0 min. What are the (a) magnitude (in km/h) and (b) angle (relative to north, with east of north positive and west of

186. ## algebra & trigonometry

Jerry wants to purchase some items whose cost function is , where x is the number of items. If Jerry spends between $50 and$80, find the minimum and maximum number of items that he can purchase. Thanks

187. ## MATH HELP!!!!!!!!

| 3 2 7 | x1 | | 46 | | -2 1 4 | x2 | = | 12 | | 6 -5 8 | x3 | | 60 | (b). Solve the system using the inverse of the coefficient matrix. (x1, x2, x3) = (________)

194. ## english

need a help on writing a poster .

195. ## algebra & trigonometry

The sum of three whole numbers is 7. The second number is 1 more than the twice of the third number. The sum of first and third number is 3 less than the second number. Find all the three numbers. Thanks

196. ## Is there a trick to dividing numbers ending in 0

Is there a trick to dividing numbers ending in 0, like 204/1700?

197. ## math

differnce btween eight times a number twice the number is 18