# Questions Asked onMarch 13, 2016

1. ## Math

At the​ airport, Person A and Person B are walking at the same speed to catch their​ flight, but Person B decides to step onto the moving​ sidewalk, while Person A continues to walk on the stationary sidewalk. If the sidewalk moves at 1 meter per​

2. ## life orientation

explain in short paragraph what can trigger spectator aggression on sport

3. ## Science

How many Btu's are required to change five pounds of ice at 20°F to water at 160°F? a. 2,608 Btu’s b. 1,390 Btu’s c. 1,304 Btu’s d. 141 Btu’s I am trying ((160-20)x.5)x5 but not getting any of the possible choices. What am I missing? Thanks for

4. ## maths

The first term of A.P. of 20th terms is 2and its last term is 59 . Find its 6th term from the end .

5. ## Physics

A roadway for stunt drivers is designed for race cars moving at a speed of 95 m/s. A curved section of the roadway is a circular arc of 760 m radius. The roadway is banked so that a vehicle can go around the curve with the friction force from the road

79. ## geography

what are some settlement patterns in the Sahara desert

80. ## Math

A team of street pavers was assigned the task of paving two parking lots one twice the size of the other. They worked for the first half of the day on the larger parking lot. Then the team split into two groups of equal number. The first group continued

81. ## math

an item is $125, but it's going on sale for$81.25. what is the percentage of the discount?

82. ## Math

In a recent survey of middle school students about pizza toppings, it was found that 25 students like pepperoni pizza, 31 like banana peppers pizza, and 5 liked both pepperoni and banana peppers on their pizza. If 66 students were surveyed, how many

83. ## physics

a horizontal spring is stretched from its equilibrium position when a force of 0.75kg acts on it. then a force of 1.5 kg is attached to the end of the end of the spring and pulled 4.5 cm along a frictionless table from the equilibrium position. the body is

84. ## Math

you deposit $200 in an account earning 3.5% simple interest. How long will it take for the balance of the account to be$221?

85. ## life orientation

indetify three courses are interested after grade 12

86. ## Physics

A non-reflecting single layer of a lens coating is to be deposited on a lens of refractive index n = 1.7. Determine the refractive index of a coating material and the thickness required to produce zero reflection for light of wavelength 540 nm.

87. ## Chemistry

What is the mass needed to make 8.5L of a 4.0 M solutution of Na2SO4? (Na=23, s=32, O=16)

88. ## maths

Ratio between number of sides of two regular polygons is 2:3 and ratio between degree measure of their interior angles is 3:4. Write the name of these polygons.

89. ## chemistry

A 1L flask contains 0.2moles of air open to atmosphere at 0degree celcius. Upon heating some of the air is lost. What is the percentage of air remaining in the flask?

90. ## Physics

A thin uniform cylindrical turntable of radius 2.1 m and mass 18 kg rotates in a horizontal plane with an initial angular speed of 8 rad/s. The turntable bearing is frictionless. A clump of clay of mass 5.5 kg is dropped onto the turntable and sticks at a

91. ## Chemistry

In a crazy scenario, the Oylan Vinegar Company has 10,000 gallons of vinegar with 0.622% concentration. This vinegar solution cannot be sold because it's too weak, but the plant manager can't bear to discard it. OVC also has a large batch of vinegar that

92. ## Physics

A woman with mass of 57 kg stands at the rim of a horizontal table having a moment of inertia of 570 kg m2 and a radius of 1.5 m.The turntable is initially at rest and is free to rotate about a frictionless, vertical axis through its center. The woman then

93. ## Math

From a sample set of 10 colored balls--5 green, 3 red and 2 yellow-- 5 are chosen at random WITH replacement. What is the probability that the result will be: green, red, yellow, red, green? Write your answer as a four place decimal number. p(G,R,Y,R,G)

94. ## math

(x - 2)10; 8th term

95. ## physics

determine the kinetic energy of a boy mass 40kg running with velocity of 3m/s

96. ## Agricultural Sciences

Determine the size of the pasture by measuring its approximate length and width.One large step is approxinately one metre.

97. ## math

(x - 2)10; 8th term (2x + y)8; middle term

98. ## math

How to write a real world problem that compares the ratios 5to 9 and 12to 15

99. ## Agricultural Sciemces

Determine the size of the pasture by measuring its approximate length and width.One large step is approxinately one metre.

100. ## Agricultural Sciences

Determine the size of the pasture by measuring its approximate length and width.One large step is approxinately one metre.

101. ## algebra

solve by elimination method to find an ordered pair. 7x-y=27 x+9y=77

1. Which of these sentences is using appositive phrase correctly? a. The Grand Canal, which is the oldest man-made waterway in the world, is still used today in China. b. The Grand Canal in China is a man-made waterway, still used, that is the oldest in

103. ## English

Why do people have stress learning new information?

104. ## Science

Volume of 12M HCL taken for preparing 1M HCL (100 ml Sol {

105. ## Physics

A partide of mass m moves along a trajectory given by x= a cos δ1 t and y = asinδ2 t . Find rand y component of the force acting on the patde, potential energy, kinetic enenev of the partide and hence show that the total energe E= KE + PE =1/2 m(a*2

106. ## Physics

A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of

107. ## PHYSICS

Calculate for Bohr's atomic model the speed of the orbiting electron in the n = 7 state. (Answer in m/s)

108. ## Physics

How much energy is required to ionize hydrogen when it is in the state with n = 6? (answer in eV)

109. ## Phys

A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of

110. ## Physics

The size of Rutherford's atom is about 0.1 nm. (a) Calculate the speed of an electron that moves around a proton, based on their electrostatic attraction, if they are separated by 0.1 nm. (answer in m/s) (b) Calculate the corresponding de Broglie

111. ## Physics

What is the difference between gravitational potential energy and electric potential energy?

112. ## Physics

What is the wavelength of light that can cause a transition of an electron in the hydrogen atom from the orbit with n = 6 to n = 8?(answer in µm)

113. ## Physics

A grizzly bear is running at a speed of 25m/s with respect to a man. The man is running 20m/s with respect to a rock. What is the bears speed with respect to the rock. (ALL VELOCITIES ARE IN THE SAME DIRECTION AND POSITIVE)

114. ## Physics

An airplane has a velocity of v=(5m/s)i + (4m/s)j at t1= 3s. For the time interval from t1=3 seconds to t2=13s the average acceleration is a= (.5m/s^2)i + (.2m/s^2)j. At 13s find the magnitude and direction of the velocity of the airplane.

115. ## Algebra

Is .0010001... Rational?

116. ## computer science

Write a java program that reads from the user the course code, section and the scores of a student for three exams representing two midterms and a final. The percentage of each of the three exams is of fixed value 30, 30 and 40 percent respectively. Your

117. ## Physics

A pendulum is constructed of a mass m connected to a mass ess rigid rod of lengthl. As shownin the figure, the other end of the rodis suspended from a point on the ring ofradius R. The pendulum is free to swing in a vertical plane that is also the plane of

118. ## Science

A car is traveling north at 15 m/s ten minutes later it is traveling at 70 m/s what is the car s initial velocity what is its acceleration

119. ## Physics

A partide of mass m moves along a trajectory given by x= a cos δ1 t and y = asinδ2 t . Find rand y component of the force acting on the patde, potential energy, kinetic enenev of the partide and hence show that the total energe E= KE + PE =1/2 m(a*2

120. ## English

1. I am a good cook, amn't I? 2. I am a good cook, aren't I? 3. I am a good cook, ain't I? 4. I am a good cook, am I not? (Which one is commonly used? Which one is used in written forms?) ------------------- 5. I amn't a good cook. 6. I aren't a good cook.

121. ## history

this quotation presents a justification for

122. ## Asthana

tell me structural formula of 2-methyl propane,2methyl propene,propanal

123. ## physics

a ball of mass 0.1 is thrown up with an initial velocity of 80m/s calculate the potential energy half way up

124. ## science

How can geothermal energy affect the use of fossil fuels?

125. ## physics

The threshold wavelength for photoelectric emission in metal is 600 nm.Find the maximum kinetic energy of the electrons emitted when it is exposed to the wavelength 200 nm

126. ## Calculus

Using a linear approximation or differentials, approximate:(26.98)^(3/4) thank you for your help!

127. ## science

A balloon filled with 3.5 L of helium at 20 °C and 3 atm. What will be the new pressure if its volume increases to 17.5 L at constant temperature?

128. ## Calculus

Starting with an initial guess of x=2, use Newton’s method to approximate (Third root of 7). Stop the iterations when your approximations converge to four decimal places of accuracy. Compare with the approximation provided by your calculator I'm so stuck

129. ## networking

what is the difference between vlan and subnetting ?

130. ## math

a cylindrical vessel without lid is made from a sheet of metal find the area of metal required if the length of the vessel is 35cm and its diameter is 28cm.

131. ## mathematical literacy

The scale on a map is given as 1:2 000 000.the distance between two towns on the map is 4,3cm?

132. ## Math

Sunitha is interested to find the Relation between the diameters of Jupiter and the earth.From the given data,it is known that the volume of Jupiter is 729 times the volume of earth.she concluded that the diameter of Jupiter is 9 times the diameter of the

133. ## Algebra

The length of a rectangular piece of steel in a bridge is 3 meters less than double the width. The perimeter of the piece of steel is 48 meters. Find the length of the steel. Find the width. What steps or formula do I use to solve this problem.

134. ## Physics

A 5000-Hz car horn is blasted while the car is moving at 35.0 m/s toward a dazed physics student (stationary). What is the frequency of the horn heard by the student. Assume the temperature is 0°C

135. ## maths

a,b,cis natural numbers and the sides of a rightangled triangle theline from altitude to hypotenues is h if 1/a+1/b+1/h - 1 find a,b,c

136. ## maths literacy, geography, history, tourism

Can i become a animator if im doing this subjects and are there buseries for me

137. ## Physics

A body of mass 10g oscillates with Simple Harmonic Motion of amplitude 4cm and time period 0.50s. Calculate: a) The maximum acceleration. b) The maximum kinetic energy.

138. ## Chemistry-DrBob222

Where did you get 5E-5. Is this how you set it up? 0.01 x 0.05 = 5E-4 If so, is it supposed to be 5E-4 instead of 5E-5? What is the equilibrium constant for a weak acid HA that dissociates 1% at an initial concentration of 0.05 M according to the following

139. ## Physics

In a double-slit experiment, the fourth-order maximum for wavelength of 450 nm occurs at an angle theta = 90. Thus it is on the verge of being eliminated from the pattern because theta cannot exceed 90. (a) What range of wavelengths in the visible range

140. ## Physics

A falling rock has a speed of 1.5 m/s. What is the velocity of the rock when it hits the ground 5 seconds later? Give the magnitude and direction

141. ## Chemistry-DrBob222

Is the answer for part c 0.91? A 1.0 L ball containing Ar at 5 atm is connected to a 10.0 L ball containing N2 at 2atm. A)Calculate the partial pressures and mole fractions of Ar and N2 after the valve is opened and the gases are allowed to mix (they fill

142. ## Life orientation

Identify three courses or study fields I'm interested in following after grate 12 write them down and in order of preferences provide two reasons of each choice

143. ## SCIENCE

At 500K,1.00mol of ONCl is introduced into 2.50dm3 closed vessel.At equilibrium the ONCl is 6.5%dissoiated.What is the value of the Kc for equilibrium at 500K

144. ## Math

A recipe for salt dough is one part flour and three parts salt. Express the amount of salt in recipe as a fraction. If you double the recipe to make the dough for crafts,using two cups of flour,how much salt will you need?