# Questions Asked onFebruary 15, 2018

1. ## Chemistry

How many moles of carbon dioxide would be produced if 0.28 moles of propane, C3H8, were combusted? C3H8 + 5 O2 --> 3 CO2 + 4 H20

2. ## Calculus

For what values of k does the series ∑n=1 to infinity (11/(2k^2 + 3))^n converge? I think this is k < -2 and k > 2.

3. ## Astronomy

If a star is receding (moving away from us) at a speed of 1.8% of the speed of light, at what wavelength would a spectral line with a laboratory wavelength of 422 nm be observed? Express your answer in nm to the nearest 0.1 nm.

4. ## Astronomy

Star A has 3 times the surface temperature and 0.6 times the radius of Star B. What is the ratio of the luminosity of Star A to the luminosity of Star B? (Indicate your answer to an accuracy of 0.1).

5. ## Astronomy

At what wavelength will the spectrum of a perfect black body with a temperature of 8,009 Kelvin peak, assuming that a perfect black body at 6000 Kelvin has a spectrum that peaks exactly at 500 nm? Express your answer in nm to the nearest whole nm. (Use the

6. ## Astronomy

When used at a wavelength of 1 micron, a telescope can resolve angles as small as 0.1 seconds of arc. How small an angle could the telescope resolve when used at a wavelength of 5 microns? a. 0.02 seconds of arc b. 0.004 seconds of arc c. 0.5 seconds of

7. ## Astronomy

In the laboratory, an atom emits a spectral line at a wavelength of 400 nanometers. In the spectrum of a star, the same spectral line is found to have a wavelength of 410 nanometers. What can be said about the star? a. It is hotter than the Sun. b. It is

8. ## Astronomy

A star is moving away from an observer at 1% of the speed of light. At what wavelength would the observer find an emission line which would occur at a wavelength of 6000 Angstroms if the star were at rest? a. 6060 Angstroms b. 6010 Angstroms c. 6000

9. ## Astronomy

A TV satellite broadcasts at a frequency of 5000 MHz, (1 MHz = 1 million Hertz). What is the wavelength of this radiation? a. 1000 cm b. 5 million centimeters c. 6 cm d. 0.3 cm

10. ## Astronomy

The same telescope is used to obtain an image using light of the following wavelengths. Which of the images will have the poorest angular resolution? a. blue b. yellow c. red d. infrared

11. ## math

A spool of rope contains 73 yards of rope. How many​ 4-foot pieces of rope can be cut from the​ spool? How much rope is left​ over? There are nothing pieces of​ 4-foot rope that can be cut from the spool. ​(Type a whole​ number.)

How much work is required to lift a 700kg satellite to an altitude of 1x10^6m above the surface of the earth? The gravitation force is F=GMm/r^2, where M is the mass of the earth, m is the mass of the satellite, and r is the distance between them. The

13. ## Chemistry

One liter of a buffer composed of 1.2 M HNO2 and 0.8 M NaNO2 is mixed with 400 mL of 0.5 M NaOH. What is the new pH? Assume the pKa of HNO2 is 3.4.

14. ## MATH

does anybody know how e^−b(3.55 s)/(0.310 kg) = 0.750? I don't understand how it could equal .750

15. ## physics

A small sphere of mass m = 0.520 kg is dropped from rest into a viscous liquid in which the resistive force on the sphere can be expressed as FD = −bv, and reaches one-fourth of its terminal speed in 3.14 s. (a) What is the terminal speed of the sphere?

16. ## Algebra 2

Find the A) Constant of Variation, B) the Equation of the Variation, and the C) the Solution Suppose B varies directly with C and inversely with D and the cube root of A. B = 4 when A = 27, C = 2, and D = 5. Find B when C = 3, A = 64, and D = 6.

17. ## Algebra 2

Find the A) Constant of Variation, B) the Equation of the Variation, and the C) the Solution Y varies directly with x. If y = -4 when x = 2, find y when x = 6.

18. ## Algebra 2

Find the A) Constant of Variation, B) the Equation of the Variation, and the C) the Solution The volume V of gas varies inversely to the pressure P. The volume of a gas is 200 cm^3 under pressure of 32 kg/cm^2. What will be its volume under pressure of 40

19. ## Algebra 2

Jimmy is wanting to fence a rectangular area of his land along Elm Creek. He will only need to fence 3 sides. If Jimmy has 2000 ft of fencing and wants to enclose the largest possible area, determine the dimensions of the rectangular plot. Hint: Write an

20. ## Algebra 2

Describe the transformation to the parent function in order to graph the following function, then write the equations of the Vertical and Horizontal Asymptote. Y = _1__ + 5 x- 3

21. ## Algebra 2

Describe the transformation to the parent function in order to graph the following function, then write the equations of the Vertical and Horizontal Asymptote. Y = _-2___ + 4 x

22. ## math

A rubber band is stretched around the four circles (each with radius r cm). i) Show that the total length of the rubber band is given by the expression r(8+2π)cm. ii) Show that the area of the shape is given by the expression r^2(12+π) cm^2

23. ## Chemistry

The molecules present in 5.2gms of glucose will be c6h12o6

24. ## Chemistry

A sample of oxygen has a volume of 205cm³ when its temperature is 22.0°C and its pressure is 30.8 kPa. What volume will the gas occupy at STP?

25. ## Physics

I am taking an online course in physics and I need to write a short paper on Analog and digital information. Below are the questions that guide me through the paper. I am having a hard time finding a website that can explain this to me. There is no text

26. ## Chemistry

How do I plot the freundlich isotherm graph given P/atm and V/cm3 data. I know that the plot is suppose to be log x/M vs log c. However, how do I get the x/m from the data and which is the c. I have already plotted the Langmuir isotherm of this data. How

27. ## ALGEBRA I

Last spring Steve joined a health club. The club charges a one-time enrollment fee of $150.00 plus a$25.00 monthly fee. Let n represent the number of months Steve pays for membership. Which of the following best represents the domain of the situation?

28. ## Math

4 balls and 3 pen cost 12 find the 6 ball and6 pen coat

29. ## MATH

_DE MORGAN'S LAWS_ (a). (A n B)^c = A^c U B^c (b). (A U B)^c = A^c n B^c Please friends I need solutions to this set

30. ## social studies

What was a direct result of the United States' fear that the Soviet Union would expand is power around the world? 1)World War II 2)the Cold War 3)communism 4)the Treaty of Versailles I think #2 Thank you.

31. ## Statistics

I'm trying to figure out which type of factorial ANOVA test to use for this data. The data is from a hypothetical study looking at whether males or females are more likely to ask questions during a seminar where people give various presentations. The

32. ## Math

Which Solid has one base that is a rectangle and four lateral surfaces that are triangles? A triangular pyramid B Cone C rectangular prism D rectangular pyramid *** Am I right?

33. ## Art History

What piece of art is probably the most recognized piece of Greek sculpture? a. Aphrodite of Melos*** b. Winged Victory of Samothrace c. The Laocoon d. Boy Strangling a Goose

34. ## Science

Identify the process that is necessary for sexual reproduction, explain why it is necessary, and identify how this process increases genetic variation.

35. ## Health check my answer

During which stage of stress does the body adapt to the ongoing presence of the stressor A. Alarm B. Resistance C. Fight-or-flight*** D. Exhaustion

74. ## A B C order

Does "brother's" come before "brothers' " in A B C order?

75. ## Science

What is the definition of energy?

76. ## Science

If the mass of each ball were the same, but the velocity of ball A were twice as much as ball B, what do you think would happen to the final velocity of each ball after the collision? To answer this question, create a hypothesis in the form of an if-then

77. ## SS

HOW CHINA AND JAPAN DEVELOPED MODERN ECONOMIES(400 words,5 para)

78. ## Spanish 1

Ana y Claudia _______ traen. (los manteles) A- Nos B- Lo C- Las D- Los

79. ## Chem

The vapor pressure of liquid chloroform, CHCl3, is 400.0 torr at 24.1°C and 100.0 torr at -6.3°C. What is ΔHvap (in the unit of kJ) of chloroform?

80. ## math

Abigail lives in an off-campus apartment. Some days she rides her bike to campus, other days she walks. When she rides her bike, she gets to her first classroom building 36 minutes faster than when she walks. If her average walking speed is 3 mph and her

81. ## World History

Which explains why Ottoman leaders began a policy of deportation and extermination of the armenians within their empire? a. they argued that Armenians were spreading anti-turk propaganda among the ottoman population b. they claimed that armenians were

82. ## Modern World Studies

Hi! I just needed someone to check my answer on this question before I turned it in. Although they are considered an important part of Native American culture, there were no ____ in the Americas before Spanish explorers arrived. A: tomatoes (I pick this)

83. ## math

Surface Area: 4r^2 41.25^2 S.A= 19.6 inches^2 Volume: 4/3r^3 4/3 1.25^3 V=8.2 inches^3 could someone check my math?

84. ## Science

1. If you are driving down the road, how do you know that the car is moving (think about your reference point)?

85. ## Math

After school, Laura babysits one child for 50 minutes. The rest for 10 minutes read for 15 minutes and play for the rest of the time write the total babysitting time the resting time and the reading time as fractions of an hour

86. ## math

In a recent year, 23.3 % of all registered doctors were female. If there were 46,800 female registered doctors that year, what was the total number of registered doctors?

87. ## math

if we have : (x + a)^2 and (x +b)^2 what will be the general form of the square of a binomial B ?

88. ## Language Arts

What is a similarity between a haiku poem and a concrete poem?

89. ## english

Fix the underlined part in the sentence. This was an important question to Americans in the eighteen century. When they were ruled by Great Britain, and it is an important question today when countries find themselves controlled by more powerful outsiders.

90. ## Math

The model builder has 4 pieces of balsa wood that are 4 cm,5 cm, 6 cm, and 7 cm in length. How many different combinations of 3 pieces can be used to make triangles without breaking or cutting the pieces? List the combinations as inequalities.

91. ## english

lz help 9. Before he would build a wall, the speaker in “Mending Wall” would want to know (1 point) what he was walling in or walling out. who might be profiting from it. what his family would think of it. how effective it was going to be. ***

92. ## Math

Age| Percent of listeners| Degree Measure| 18-24 11% ??????????????

93. ## Math

Barbara makes a scale drawing of a statue using the scale 1 centimeter =5 feet. Her drawing measures 12 centimeters tall. Kyle makes a scale drawing of the same statue using the scale 1 centimeter=4 feet. How many centimeters tall is the statue in Kyle's

94. ## geometry

the perimeter of triangle B is 6 times greater than the perimeter pf triangle 6. the area of triangle B is how many times greater than the area of triangle A?

95. ## Chemistry

The temperature of a lead fishing weight rises from 26 C to 38 C as it absorbs 11.3 J of heat. What is the mass of the fishing weight in grams? ( The specific heat capacity of lead is 0.128 J /g C )

96. ## Math calculus 2

A propane tank is in the shape generated by revolving the region enclosed by the right half of the graph of (4*x^2)+(64*y^2)=144 and the y-axis about the y-axis. If x and y are measured in meters find the depth of the propane in the tank when it is filled

97. ## Math calculus 2

Find the volume of the solid generated by revolving the region enclosed by the curves y=5*(sqrt(x)), y=0, and x=2 about the line x=9.

98. ## Math calculus 2

Let S be the region of the xy-plane bounded above by the curve ((x^3)*y)=64, below by the line y=1, on the left by the line x=2, and on the right by the line x=4. Find the volume of the solid obtained by rotating S around (a) the x axis (b) the y axis (c)

99. ## Math calculus 2

Find the volume of the solid generated by revolving the given region about the line x=16: y=4-x,y=0,y=2,x=0.

100. ## 6thMath

You walked 2⁄15 miles from your chemistry class to your economics class at a constant speed of 0.8 miles per hour. How long did this take you?

101. ## Math

Need some help setting this up. Thank you. A dance studio measures 150 feet by 120 feet. A scale drawing of the dance studio floor measures 10 units by 8 units. What scale was used to create the scale drawing? A) 1 unit: 8 feet B) 1 unit: 10 feet C) 1

102. ## 6thMath

Dominique drove home from work at an average speed of 36 miles per hour. If the distance from her house to her workplace is 5.4 miles, how long did her commute take?

103. ## math

if we have : (x + a)^2 and (x +b)^2 what will be the general form of the square of a binomial B ?

104. ## Chemistry

If an aqueous solution is 5.08 % by weight in sodium chloride and contains 1.79 g of sodium chloride, what mass of water is present in the solution?

105. ## chemistry

calculate the ph of half cell Pt,H2|H2SO4, if its electrode potential is 0.03V

106. ## History

Which identifies the reason for the rise of imperial powers? Industrialized nations wanted to extract resources from developing nations. European countries wanted to add value to their land-based economy by expanding their territories. Colonial powers

107. ## math

Searches related to what is the answer to Triangle ABC has two sides that measure 12 inches and 16 inches. Which could be the measures of the corresponding sides of a triangle that is similar to triangle ABC? 1. 10 in and 14 in 2. 9 in and 12 in 3. 6 in

108. ## science

Which option would guide the thought processes of a scientist? instinct hearsay opinion empirical data D?

109. ## Math 115

Create a piecewise function of the following scenario where Upper D left-parenthesis t right-parenthesis is the total distance walked (in miles) as a function of time t (in minutes): “You begin a walk from your home at a fast pace of 3 miles per hour for

110. ## Math 115

Create a piecewise function of the following scenario where Upper D left-parenthesis t right-parenthesis is the total distance walked (in miles) as a function of time t (in minutes): “You begin a walk from your home at a fast pace of 3 miles per hour for