57. physics 20

What is the true weight of a 60-kg astronaut on: a) the surface of Mars? b) the surface of Saturn? given: mass of Mars= 6.42x10^23 mass of Saturn= 5.69x10^26

58. chemistry

Consider the following equation: CO + 2 H2 → CH3OH △H rxn = -128 kJ Calculate the amount of heat (in kJ) associated with complete reaction of 8.08 g H2

59. Chemistry

Sodium chloride dissolves in water (solubility in water is 361g/1L), but copper (II) phosphate does not dissolve in water (insoluble). A. Describe in a stepwise fashion how the solid sodium chloride dissolves in the water to form a solution. (name the

60. Critical Thinking

Consider the following conductive argument: P1. Critical thinking teaches the fundamentals of good reasoning. P2. Critical thinking helps people learn how to detect bad reasoning in the arguments they hear and read. P3. Critical thinking principles

61. Language Arts

Are these right? My aunt discovered a skunk under her porch and called the Humane Society for help in removing it. *simple sentence Some committee members preferred either a musical comedy or a mystery. *simple sentence

62. chemistry

A pound of coffee beans yields 56 cups of coffee (4 cups= 1 qt.) how many milliliters of coffee can be derived from 2.2g of coffee beans?

63. English

1. He set the table for dinner. (Does 'for dinner' modify 'the table' or 'set'?)

64. phicis

A string of mass 10.0 grams and length L = 3m has its ends tied to two walls separated by distance D = 2m. Two masses of 2 kg each are suspended from the string as shown in the figure. If a pulse is sent from Point A, how long does it take to travel to

65. math

Charlie can type faster than any of his classmates. He took a test that showed he can type 700 words in 5 minutes . How many words can he type per minute

66. Science

The nitrogen cycle is carried out primarily by A.humans B.autotrophs C.bacteria D.fungi

asked by Cc griffin middle scho
67. Chemistry

Name the compound or give molecular formula. 1. Pt(NO2)2 : ? Is it Platinum (II) Nitrite 2. Manganese (II) bromide pentahydrate:? Is it MnBr2 • 5H2O

68. Physics

Some bags (the mass of each bag is 50 kg) are put in the truck of 200 kg mass. After applying 400 N force the car started moving with 1 m/s accelaration.Now my question is'', how many Bags are in the truck?

69. Economics

Initially suppose that both countries have the same production function, namely q = K.3L.7. For this production function, MPL = .7K.3L-.3 and MPK = .3K.-7L.7. Derive (with all steps shown) the long-run total cost function for each country. (Given that both

70. chemistry

Help me solve it. Step by step please The value of kp at 20°c for the reaction 2NO(g) +Cl2(g) 2NOCl(g) is 1.9x10^3 atm-1 calculate the value of KC at the same temperature.

71. Chemistry

How many grams of 10% wt BaCl2 solution will be necessary to produce 5.6g BaCl2?

72. English

What is the Supporting Sentence of the topic Sentence I like to collect coins (or anything else that you like ? what is the Suppprting sentence of the topic sentence This weekend i will help my parents do some household chores ?

73. Chemistry

Chart: Group, Bond length, Bond strength, H-X-H Bond Angle NH3: 1.000, 391, 107 PH3: 1.412, 322, 93.5 AsH3: 1.510, 247, 92 SbH3: 1.688, 247, 92 What physical states do these molecules exist at room temperature? Gas Briefly explain the observed trend in

74. Chemistry

150 g of water at 80 degree Celsius is cooled to 50 degree Celsius how much heat is lost bye the water

75. algebra 2

Kate can row a boat 10 miles per hour in still water. in a river where the current is 5 miler per hour, it take her 4 hour longer to row a given distance upstream than to travel the same distance downstream. Find how long it takes her to row upstream, how

76. Sociology

Write a 700- to 1,050-word essay in which you complete the following: Give a brief introduction that identifies the issue you have chosen and why.Describe in three separate paragraphs how each perspective would view or explain the issue.Include in your

77. Math

Arianna is taking care of her uncle's dog during the week. He left 3 cans of food for 5 days. How much good should she give each day assuming the dog eats exactly the same amount each day

78. Applied Calc

Find the indefinite integral of (1-sqrtx)/(1+sqrtx)dx I just worked completely through this problem using substitution (u=1+sqrtx) and came to the answer 3+4sqrtx+x+C. This is incorrect. Not sure where I messed up.

79. Applied Calc

Find the indefinite integral. ∫ x^2(1-x)^6 dx I am so lost on this. I let u=1-x so du=-dx. After that, I'm not sure what to do.

80. Algebra 2

Find the coordinates of the vertices of the figure formed by each system of inequalities. y>=-3 x=x-2 y

81. Algebra

A large screen at a theater measures 65 feet diagonally. The aspect ratio (width compared to height) of the screen is 21:9. What is the approximate width and height of the screen?

82. Chemistry

Calculate the frequency of light associated with the emission from n=5 to n=4 in the hydrogen atom. I got -7.41 x10^13 Hz, but the answer would make sense if it is positive... So does this mean that when the electrons jump from n=5 to n=4, energy is

83. English

Hello. Please help me to check the sentences: 1) His sister or his brother hasn't any bank accounts. 2) His sister and his brother haven't any bank accounts. Thank you for your help.

84. Quick Question

Were African Americans allowed to vote during the 1960's? I just need a simple yes or no.

Find the point of intersection of the lines 3x+2y=15and7x-3y=4

86. physics

Two plus lenses have focal lengths in the ratio 7:1. When placed together in close contact the focal length of the combination is +12.5cm. What are the focal lengths of the two lenses?

87. Math

Hey can someone review my math and see if i did it correctly? The math question is: Choose one product from your business and determine the markup and gross profit for it. Assume that the retail price of the product is $85, the cost is$47, and the

88. Calculus

Set up a double integral for calculating the flux of the vector field F⃗ (r⃗ )=r⃗ , where r⃗ =⟨x,y,z⟩, through the part of the upward oriented surface z=9(x^2+y^2) that lies above the disk x^2+y^2≤25.

89. Science

A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?

90. algebra

A piece of ribbon 3 1/4 ft long is cut from a 8-foot roll of ribbon. how much ribbon remains on the roll?

91. Government

Why is due process a cornerstone of the judicial system?

92. Chemistry

34.09 ml of 0.251 M KOH is required to tritate a 10.2951 g sample of acetic acid solution. The density of the solution had been previously found to be 1.007g/ml. what is the molarity of the aetic acid solution?.

93. math

For an art​ project, Marco cuts a 12 and two thirds ft piece of string into 8 equal pieces. How long is each​ piece? Maria cuts her string into 8 equal pieces of length 2 and seven twelfths ft. Which student started with the longer piece of​ string?

94. vocabulary eng

looking for a simple way to explain the differnce between inexorable and obdurate inexorable - unyielding stubborn unalterable obdurate - stubbornly persistant Please do not send me a link - I need help in understadning differnce not in a definition.

John is at a car show. Beginning 2.5 miles away, a car travelling at a constant 45 miles per hour approaches and then passes John. The distance between John and the car can be represented by the equation d = |2.5 – 45t|. At what times is the car 0.5

96. Science

A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?

97. Science

A spring scaled is used to measure the weight of a object on the earth. The scale on the moon would read what?

98. math

A.) write the rational expression as an equivalent expression whose denominator is the given polynomial. 1.) 6/7x^2y = ________/49x^3y^2 B.) perform the indicated operations, simplify if possible. 2.) x^2-3x-4/x^2-16 x x+4/3x-9

John is at a car show. Beginning 2.5 miles away, a car travelling at a constant 45 miles per hour approaches and then passes John. The distance between John and the car can be represented by the equation d = |2.5 – 45t|. At what times is the car 0.5

100. statistics help??

Someone flips a coin 50 times and gets 50 heads in a row. You suspect it is a 2 headed coin. Write the null and alternative hypotheses. Use the binomial theorem to get a p-value of getting exactly 50 hears in 50 trials.

120. English

Can you please check my answers? Cross out the prepositional phrases. Underline the subject once and the verb twice. Don't forget to label any adverbs. 1.) Our maid cleaned the top of the counter and looked amid the groceries throughout the refrigerator.

The metaphor in te fiesta stands is uses to emphasize that the

122. Math

For the equation -4y=8x, what is the constant of variation?

123. Psychology

Erickson's theory is based on the assumption that

124. math

what point of f(x)= e^(1-x^2) is concave down? I think it is -3/2

125. Math

What is an equation for the line with slope 2/3 and y-intercept 9?

126. math

A woman was tired of being asked how old she was, so she composed the following riddle Four times two and nine times three, add that to my age and it will be, as much two tens and four, plus twice my age minus a score.

127. English

1. National flags stand for the spirits of each country. 2. National flags stand for the spirit of each country. =============== Which one is right, spirit or spirits?

128. Calculus

How do I integrate sqrt of (1+e^(2x)) if doing u-sub.. u=sqrt of (1+e^(2x)) and ten using partial fraction...?

129. Critical thinking (Check)

4. The newly elected Canadian government is planning on withdrawing Canada’s CF-18 jets from the allied bombing campaign against the Islamic State (aka ISIS, aka ISIL, aka Daesh) forces within Iraq and Syria. The Conservative opposition in Parliament is

131. Ap physics

fine sand moves through pipes just like fluid. a sandblasting machine moves fine sand through a pipe of inner diameter 2.8 cm at 75L/minutes. the sand comes out from two identical jets at speed 45 m/s. calculated the diameter of the holes through which the

132. Kewi

Find the mean heights of the curve y^2=2x between x=1 and x=3

133. Chemistry

In a moist room (44m3) 4 kg dry CaCl2 is placed. The room contains 10 g/m3 of H20. How much of the CaCl2 is converted to CaCl2*2H2O? Temperature 10 deg C. Equilibrium constant is 10^5 atm-2 at 10 deg C. I've caclulated Kp to 0,0032 atm and then tried to

134. Math

Find the inverse of f(x)= 3x. I believe the answer is: 1/3x= y f(x)=3x and g(x)=3x y=3x x/3= 3y/3 1x/3=y

135. Science

The mass of a baggage loaded truck and the mass of one bag are given . Now what will be the number of bags?

136. Mathematics

The width of a rectangle is 20m less than twice its length. If the perimeter of the rectangle is more than 56m, find the minimum dimensions of the rectangle if each dmension in meters is an integer.

137. trigonometry

Find the length of the arc intercepted by the angle 50-degree inch in a circle of 6m

138. Critical thinking

How do I determine if an inference is inductively valid or not?

139. Biology

summarize the reproductive cycle of pines

140. Philosophy

If you have a inductive argument, and you're evaluating if the conclusion is valid or not, if you can figure out a different conclusion is it valid or not?

141. chemistry

What is the enthaphly change when 2 moles of fe(111)oxide is reduced by 3 moles of aluminium ♢Hf Al2O3= -1676kJ mol-1 ♢Hf (Fe2O3)= -825kJmol-1

142. French

How do you say "It's right there in front of you" in French?

143. I can

Timothy has a piece of fabric that is 7 yards long. he cuts the fabric into 8 equal pieces.

144. Maths

The mean of these 8 numbers is 9 and their range is 8. What are the 2 missing numbers 6,11,9,7,8,13,?,?

145. Government

To what extent is affirmative action used today?

146. Chemistry

How many grams of cesium chloride (CsCl) will be needed to make 750. mL of a 0.100 M CsCl aqueous solution? The formula mass of CsCl is 168.36 g/mol. Remember Molarity: M = (mol solute) / (L of solution) I need help solving this problem

147. math

Find the x value for all maxima and minima of f(x) if: f'(x)=(x-7)(x+3)(x-8)^2(x+27)^3

148. chemistry

How to solve this problem in counting atoms 2 pb(CN)2

149. Chemistry

Can pi bonds be made from d-orbitals?

150. Introduction to Terrorism

Will terrorism become the accepted method of warfare in the future for the disenfranchised and alienated peoples?

151. Introduction to Terrorism

Can you explain why some countries see terrorism as having appealing attributes as an instrument of war?

152. Math HELP!

How do you subtract fractions? I don't get it.

153. time

an airplane is traveling at 550km/hr. how long does it take to cover 15 km

154. English

Directions: Identity the participle or participle phrase and the words that they modify: The horseman is the ghost of a beheaded soldier who appears at night. I am thinking beheaded is the participle that modifies the soldier or is it a phrase beheaded