Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Kevin
Chemistry Equation Question?
Barium can be prepared from its oxide and aluminum. Write an equation for this process.
1 AnswerChemistry5 years agoChemistry Question?
Explain why calcium hydroxide is written as Ca(OH)2 rather than H2CaO2 and serves as a base rather than an acid.
4 AnswersChemistry5 years agoSuggest why sodium hydroxide is much more water soluble than sodium chloride.?
Suggest why sodium hydroxide is much more water soluble than sodium chloride.
2 AnswersChemistry5 years agoMost stable alkene of each of the following pairs?
Predict the more stable alkene of each of the follwing pairs:
1) 1-hexene or trans-3-hexene
2) trans-3-hexene or cis-3-hexene
3) 2-methyl-2-hexene or 2,3- dimethyl-2-pentene
1 AnswerChemistry5 years agoWhich of the following is a BAD leaving group?
Which of the following is a BAD leaving group?
A. H2O
B. I-
C. Br-
D. Cl-
E. -OH
1 AnswerChemistry5 years agoFind critical points and classify them as local maxima, local minima, saddle points, or none of these?
Let f(x,y)=e^(−x^(2))+6y^(3). Find critical points and classify them as local maxima, local minima, saddle points, or none of these.
1 AnswerMathematics5 years agoRank the following groups in order of decreasing priority. (priority 1 should be listed first)?
Rank the following groups in order of decreasing priority. (priority 1 should be listed first)?
I). -CH2OH
II). -CH(CH3)2
III). -COOH
IV). -OH
A. III, I, IV, II
B. III, IV, II, I
C. IV, II, III, I
D. IV, III, I, II
1 AnswerChemistry5 years agoHow long does it continue to slide along the ramp before it comes to rest?
A mass of 5 kg is sliding up a ramp (coefficient of friction = 0.6 and theta = 5), initially sliding at 7 m/s. How long does it continue to slide along the ramp before it comes to rest?
A) 0.6 s
B) 1.0 s
C) 2.1 s
D) 3.6 s
E) 6.7s
1 AnswerPhysics5 years ago
What was the magnitude of the force of friction during the time the block slowed?
A block of mass 2 kg is sliding down an inclined that has a coefficient of kinetic friction of 0.4. The block slows from 2 m/s initially to rest. The incline is at 30 degrees. What was the magnitude of the force of friction during the time the block slowed?
A) 3.4 kg m/s^2
B) 4.0 kg m/s^2
C) 5.1 kg m/s^2
D) 6.8 kg m/s^2
E) 8.3 kg m/s^2
4 AnswersPhysics5 years agoMath question?
Use Laplace transformation to solve the IVP.
y" + 2y' = -4H(t - 2) , y(0) = 0 , y'(0) = 0
Mathematics5 years agoMath help?
Use Laplace transformation to solve the IVP.
y" + 2y' = -4H(t - 2) , y(0) = 0 , y'(0) = 0
1 AnswerMathematics5 years agoLaplace Transformation Problem?
Use formulas in the Laplace Transform table to compute
L^(-1) {[(s+1)/s^2] e^(-s)}
Mathematics5 years agoLaplace Transformation Problem?
Use formulas in the Laplace Transform table to compute
L^(-1) {[(s+1)/s^2] e^(-s)}
1 AnswerMathematics5 years agoSolve the IVP?
Solve the IVP.
y''-2y'-3y = 4(cost)delta(t-pi),
y(0)=0, y'(0)=0
1 AnswerMathematics5 years agoMath Help?
Consider the second order IVP
y''+3y'+2y=g(t), y(0)=0, y'(0)=0
i) SOLVE y(t) as y(t) = h(t)*g(t) and write down h(t)
ii) For g(t) given by g(t) =
function 1: 0, interval: 0<=t<3,
function 2: 1, interval: 3<=t
CALCULATE h(t)*g(t)
2 AnswersMathematics5 years agoInitial Value Problem Help?
Consider the second order IVP
y''+3y'+2y=g(t), y(0)=0, y'(0)=0
i) SOLVE y(t) as y(t) = h(t)*g(t) and write down h(t)
ii) For g(t) given by g(t) =
function 1: 0, interval: 0<=t<3,
function 2: 1, interval: 3<=t
CALCULATE h(t)*g(t)
2 AnswersMathematics5 years agoMath help?
Consider the second order IVP
y''+3y'+2y=g(t), y(0)=0, y'(0)=0
i) solve y(t) as y(t) = h(t)*g(t) and write down h(t)
ii) For g(t) given by g(t) =
function 1: 0, interval: 0<=t<3,
function 2: 1, interval: 3<=t
calculate h(t)*g(t)
2 AnswersMathematics5 years ago
Support cable question?
A 1 425-N uniform boom at ϕ = 69.0° to the vertical is supported by a cable at an angle θ = 21.0° to the horizontal as shown in the figure below. The boom is pivoted at the bottom, and an object of weight m = 2 400 N hangs from its top.
(a) Find the tension in the support cable._____
(b) Find the components of the reaction force exerted by the floor on the boom.
horizontal component magnitude ____ kN
vertical component magnitude _____ kN
2 AnswersPhysics5 years agoAt what speed was the rocket launched?
A rocket fired from earth's surface rises 900 km. At what speed was it launched? Provide answer in m/s.
3 AnswersPhysics5 years agoPhysics help please?
A 100 kg sofa 4 m long is carried by James and Sarah. James has the end, Sarah is holding the sofa 0.5 m from the other end. Some moron places a 50 kg box of books on the sofa on the very end of the sofa Sarah is holding. How much weight is Sarah holding now?
a) 300 N
b) 500 N
c) 700 N
d) 900 N
e) 1100 N
2 AnswersPhysics5 years ago