1. Chemistry

Consider the titration of 100.0 mL of 0.260 M propanoic acid (Ka = 1.3 ✕ 10−5) with 0.130 M NaOH. Calculate the pH of the resulting solution after each of the following volumes of NaOH has been added. (Assume that all solutions are at 25°C.) (a)

4. PHYSICS IMP PLS

Consider a rocket in space that ejects burned fuel at a speed of v_ex= 2.0 km/s with respect to the rocket. The rocket burns 10 % of its mass in 290 s (assume the burn rate is constant). (a) What is the speed of the rocket after a burn time of 145.0 s?

5. Classical Mechanics - Need Help Please

A block of mass m= 3 kg is initially at rest on a horizontal surface. At time t=0, we begin pushing on it with a horizontal force that varies with time as F(t)=βt2, where β= 1.2 N/s2. We stop pushing at time t1=5 s [F(t)=0 for t>t1]. (a) First, assume

6. math

Tom Schriber, a director of personnel of Management resources, Inc. is in the process of designing a program that its customers can use in the job finding process. Some of the activites include preparing resumes, writing letters, making appointments to see

7. physics help

A spherical non-rotating planet (with no atmosphere) has mass m1= 5 ×1024 kg and radius r1= 8000 km. A projectile of mass m2≪m1 is fired from the surface of the planet at a point A with a speed vA at an angle α=30∘ with respect to the radial

8. Physics Classical Mechanics

A spherical non-rotating planet (with no atmosphere) has mass m1= 4 ×1024 kg and radius r1= 5000 km. A projectile of mass m2≪m1 is fired from the surface of the planet at a point A with a speed vA at an angle α=30∘ with respect to the radial

9. Physics

A 0.40 g fruit in a tree has a gravitational potential energy of 200 J. How high from the ground is the fruit?

10. GEOMETRY CIRCLE

1.An isosceles triangle with each leg measuring 13 cm is inscribed in a circle . if the altitude to the base is 12 cm find the radius of the circle 2. Circles a and b are tangent at point c. p is on circle a and q is on circle b such that pq is tangent to

11. Math

Find the equation to the curve that joins the following points. (1,1),(0,1),(2,5),(-1,-5)

12. math

The bases of trapezoid ABCD are \overline{AB} and \overline{CD}. Let P be the intersection of diagonals \overline{AC} and \overline{BD}. If the areas of triangles ABP and CDP are 8 and 18, respectively, then find the area of trapezoid ABCD.

13. Math

A quartic graph has the following coordinates: (-4,0),(-2,0),(0,0),(1,0) find the equation in expanded form.

14. PHYSICS(elena)

Consider a rocket in space that ejects burned fuel at a speed of vex= 1.5 km/s with respect to the rocket. The rocket burns 8 % of its mass in 280 s (assume the burn rate is constant). (a) What is the speed v of the rocket after a burn time of 140.0 s?

15. English

Hello. I can't express how grateful I am to Writeacher for the help. Thank you! I have one more technical question. Is it necessary to translate the names of authors and their works in footnotes/references if I refer to them in an article to be published

16. Physics Classical Mechanics

A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that ω(θ=0∘)=0. The ruler has mass m=

17. physics (Urgent)!!!!!!!!!!!!!!!!!!!!!!

A merry-go-round (pictured) is sitting in a playground. It is free to rotate, but is currently stationary. You can model it as a uniform disk of mass 210 kg and radius 110 cm (consider the metal poles to have a negligible mass compared to the

18. physics(URGENT!!!!!)

A spherical non-rotating planet (with no atmosphere) has mass m1= 5 ×1024 kg and radius r1= 7000 km. A projectile of mass m2≪m1 is fired from the surface of the planet at a point A with a speed vA at an angle α=30∘ with respect to the radial

19. physics (Urgent)!!!!!!!!!!!!!!!!!!!!!!

Consider a rocket in space that ejects burned fuel at a speed of vex= 1.5 km/s with respect to the rocket. The rocket burns 8 % of its mass in 280 s (assume the burn rate is constant). (a) What is the speed v of the rocket after a burn time of 140.0 s?

20. physics(URGENT!!!!!)

A source of sound emits waves at a frequency f= 650 Hz. An observer is located at a distance d= 170 m from the source. Use u=340 m/s for the speed of sound. (a) Assume completely still air. How many wavefronts (full waves) N are there between the source

21. physics(URGENT!!!!!)

A ruler stands vertically against a wall. It is given a tiny impulse at θ=0∘ such that it starts falling down under the influence of gravity. You can consider that the initial angular velocity is very small so that ω(θ=0∘)=0. The ruler has mass m=

22. physics(URGENT!!!!!)

A yoyo of mass m=2 kg and moment of inertia ICM=0.04 kg m2 consists of two solid disks of radius R=0.2 m, connected by a central spindle of radius r=0.15 m and negligible mass. A light string is coiled around the central spindle. The yoyo is placed upright

HELP ME PLEASE. 1.An isosceles triangle with each leg measuring 13 cm is inscribed in a circle . if the altitude to the base is 12 cm find the radius of the circle 2. Circles a and b are tangent at point c. p is on circle a and q is on circle b such that

24. SOLID

the altitude BE of parallelogram ABCD divides the side AD into segments in the ratio 1:3. Find the area of the parallelogram if the length of its shorter side is 14 cm, and one of its interior angle measures 60 degrees.

25. physics

a .2 kg ball is being swung around a verticle circle from a 1 m long string, the ball is traveling at 4 m/s counter -clockwise. what is the tension on the string?

PLEASE someone check these for me, Thanks.. Delta Inc. offers to sell Omega Corp. a packaging machine. Omega responds “We’ll take it but only if there is a six-month warranty.” Which of the following is true? There is a contract, and Omega has a

27. Buisness Math

Given the following matrices: Compute (i) AB (ii) A+2B (iii) AC (iv) 5C (v) B-C Note:Give proper reason where computation is not possible.

28. English

Write complete sentence if the statement is a complete sentence. Write not a sententce if the statement is not a complete sentence. 1/. The author thought of a story. Complete sentence. 2/ Took place long ago. Not sentence . 3/ Her first day at school. Not

29. Managerial Economic

The equation for a demand curve has been estimate to be Q = 100 - 10P + 0.5Y, where Q is quantity, P is price, and Y is income. Assume that p = 7 Y = 50. a. Interpret the equation b.At a price of 7, what is price elasticity? c. At an income level of 50,

107. Math (logs)

In x = -3 find x. I worked it out like this e^inx= e^-3 then I got x = 1/e^3. Is that correct?

108. American Government

The 1952 and 1956 Eisenhower elections are examples of A. maintaining B. dealigning C. deviating D. realigning Is d the correct answer

109. Math

Seven friends have similar phone plans. The price of each plan is $x. Three of the seven friends pay an extra$4 per month for unlimited text messaging. Write and simplify an expression that represents the total of cost of the seven plans.

110. Health (Ms. Sue)

Describe the types of financial concerns many older adults experience. A: Older adults might experience financial concerns such as not being able to afford expensive health care, and residing in retirement homes and losing their independence?

111. Math

A set of glassware includes 5 tall glasses and 3 juice glasses. Use t to represent the cost of each tall glass and j to represent the cost of each juice glass. Write an expression that represent the total of cost of 4 glasses.

112. Chemistry

How do I balance this chemical reaction? __K + __CaBr2 → __KBr + __Ca

113. PHI 103

A person who is shown his or her argument commits a fallacy should A. run screaming from the room. B. argue louder. C. add another fallacy. D. revise the argument.

114. Math

1/3 - x + 5/3 = x-4 How do I do this ?

115. Chemistry

How many grams of K2Cr2O7 (Potassium dichromate) must be used to make 250 ml of a0.125 M solution?

116. Health (Ms. Sue)

Explain how someone might appropriately deal with a midlife crisis. A: Someone could appropriately deal with a midlife crisis by exploring and sharing their feelings by either trusting a friend or seeing a therapist, by reevaluating and thinking of what

117. calculus

a farmer wants to make a rectangular pen from 200 feet of fencing. he plans to use a 100 foot wall along with some of the fencing to make one side of the pen. find the dimensions of the pen that will make the enclosed area as large as possible.

118. Algebra

Please help me find the value of the annuity for the following: a1= $8000, I=0.06, n=10$8,000 invested for 10 years at 8% compounded annually\$8,000 invested for 10 years at 0.06% n = 10 Thank you.

119. Trigonometry

. Which of these standard trigonometric functions has the least period? A. cosine B. cosecant C. tangent D. secant

120. other

he HIM department listed the following LOS data for the longest admissions for the month of September. What LOS is the 90th percentile? 43, 45, 54, 55, 59, 60, 62, 64, 66, 67, 67, 68, 68, 69, 70, 70, 71, 72, 74, 75

121. English

Which of the following is a sentence fragment? He spent twenty dollars on those shoes. How much did you spend on those shoes? That much money on those shoes? Spending way too much! C or D?

122. American government

The 1952 and 1956 Eisenhower elections are examples of A. maintaining B. dealigning C. deviating D. realigning Is d the correct answer

123. Health (Ms. Sue)

Why do you think that having a positive attitude about growing older is important? A: Having a positive attitude about growing older is important because mental health and physical health affect each other. For example, physical exercise can reduce

124. Physic

A horizontal force F pulls a mass m across the floor at constant speed a distance d. If the coefficient of friction between box and floor is u, the work done by the force F is. I know W= FD and Wf = umgd, but I don't understand what the question asking.

125. Trigonometry

. Which of these standard trigonometric functions has the least period? A. cosine B. cosecant C. tangent D. secant

126. PHI 103

If an argument does not commit a fallacy, it is A.necessarily valid. B.necessarily sound. C.Not enough information to determine D.Both A and B

127. trig

prove that: sinC+sinD =2sin((C+D)/2)*cos((C-D)/2)

128. Pre calculus

Why is it dangerous to use the law of sines to find an angle but is not dangerous to use the law of cosines? Please explain this thoroughly.

129. Physics

Place a small rubber ball on top of a basketball or soccer ball and then drop them together. If vertical alignment nicely remains as they fall to the floor, you’ll see that the small ball bounces unusually high. Can you reconcile this with energy

Derek is building a bird feeder to sell at a crafts fair. He is using a board that is 4 feet long. He will cut one piece that is 2 feet long for the base. Then he will use the rest of the board and cut it into two pieces of equal length for the sides. If

131. Health (Ms. Sue)

"Juan was a successful architectural engineer in San Francisco, California. He had two children and a wife. At age 42, he finally quit his smoking habit, which he started when he was 18. He began to jog every day and completed a marathon on his 45th

132. math

there were some ducks in the pond.28 ducks flew away.7 more arrived at the pond.now there are 43 ducks in the pond.how many ducks were in the pond to start

133. Algebra 2

What is a polynomial function in standard form with zeros 1, 2, 3, and –3?

134. Math

When will they meet? Given that... student A : started driving at 9hr at 3mi/hr student B: started driving at 9hr25min at 2mi/hr

135. math alegebra

A satellite's escape velocity is 6.mi./sec, the radius of the earth is 3960 mi, and the earth's gravitational constant (g) is 32.2 ft./sec^2. How far is the satellite from the surface of the earth?

136. Math

If a scale factor is 1 in = 5 miles how wideis the national park that is 8 inches. My answer is1.5 miles ami correct thanks

137. Physics 2

A sheet of plastic (n = 1.56) covers one slit of a double slit (see the drawing). When the double slit is illuminated by monochromatic light (vacuum = 568 nm), the center of the screen appears dark rather than bright. What is the minimum thickness of the

138. medical coding

A patient is admitted to the hospital for chest pains due to tachycardia. While in the hospital, the patient was also treated for type 1 diabetes. Upon further review, the coder noted that the documentation and ekg didn, t provide further evidence of the

139. Chemistry(DrBob222)

for a thermodynamics lab, I have to graph the ln K vs. 1/T, so does the ln K go on the y-axis and the 1/T go on the x-axis?

140. Statistics

Suppose that you visit Shire, and find that 28% of Hobbits believe in the existence of Elves, 16% believe in the existence of Ents, and 9% believe in the existence of both Elves and Ents. You come across a Hobbit: i) What is the probability that he will

141. Trigonometry

complex numbers

142. English

The Curse of the Mummy by Joyce Hannam ------------------ Is this book a novel or a nonfiction?

143. Physics

Really need help with this asap plz~ there is a 4kg wooden block on top of a wooden ramp forming an angle of 37 degrees above surface.The block is placed 1.2 m up on the ramp and the ramp is connected to another wooden flat board.So when the block slides

144. math

A satellite's escape velocity is 6.mi./sec, the radius of the earth is 3960 mi, and the earth's gravitational constant (g) is 32.2 ft./sec^2. How far is the satellite from the surface of the earth?