Thursday
March 23, 2017

# Posts by elvis

Total # Posts: 40

engineering mathematics
A car is travelling along the road at 8m/s. It accelerates at 1m/s/s for a distance of 18meters. How fast is it then travelling
February 24, 2017

engineering mathematics
Write down 4 equations of horizontal linear motion and quantify them
February 24, 2017

engineering mathematics
A car of mass 500kg is travelling along a flat road. its engine provides a forward force of 300N. Air resistance is 200N. What will its acceleration be?
February 24, 2017

engineering mathematics
A cyclist of mass 60kg rides a bicycle of mass 20kg. When starting off, the cyclist provides a force of 200N. What is his acceleration?
February 24, 2017

math
A Boy Is 6 years Younger Than His Sister.The Product Of Their Ages Is 135.Find The Ages
September 25, 2016

Science
A coconut of mass 2kg is on a tree of 5m tall; determine the potential energy of this height Take g=10ms^-2.
February 28, 2016

Physics
A stone is projected upward at an angle of 30 degree to the horizontal from the top of a tower 100m and it hits the ground at a point q. If the initial veloity of projection is 100ms cal the maximum height of the stone above the groud
January 10, 2016

Math
the answer 0.5757575757... as a fraction
August 25, 2015

science
Calculate the energy required to vaporize 50g of water initially at 80¡ãC. ( specific heat capacity of water- 12jgk, specific heat of vaporization- 220jk
July 7, 2015

life orientation
I don't know help me
February 18, 2015

physic
Two boxes are connected by by a massless string over a massless, frictionless pulley. Box 1 has a mass of m1 = 15.0 kg and is initially at rest at the bottom of a frictionless surface inclined at an angle θ = 30.0◦ above the horizontal. Box 2 has a mass of m2 = 10.0...
October 14, 2014

physic
A box with a mass of m = 7.50 kg is set on top of a spring with a spring constant of k = 500 N/m. The box is pushed down 30.0 cm and released. (a) What is the maximum height the box reaches after being launched by the spring? (b) What is the instantaneous power delivered to ...
October 14, 2014

physic
A box with a mass of m = 7.50 kg is set on top of a spring with a spring constant of k = 500 N/m. The box is pushed down 30.0 cm and released. (a) What is the maximum height the box reaches after being launched by the spring? (b) What is the instantaneous power delivered to ...
October 13, 2014

physic
Two boxes are connected by by a massless string over a massless, frictionless pulley. Box 1 has a mass of m1 = 15.0 kg and is initially at rest at the bottom of a frictionless surface inclined at an angle θ = 30.0◦ above the horizontal. Box 2 has a mass of m2 = 10.0...
October 13, 2014

science(biology)
state three secondary functions of roots,stems and leaves
August 17, 2014

Science-Ms.Sue
B is right.
November 24, 2013

Chemistry
A sample of gas occupies 29 L under a pressure of 1.3 atm. What ...
January 9, 2013

chemistry
how carbon dioxide is form is bath bombs
January 9, 2013

Geometry
87m=SA 45m=V
February 28, 2012

chemistry
The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d. the reaction starts out first order and changes ...
February 18, 2012

chemistry
The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d. the reaction starts out first order and changes ...
February 18, 2012

chemistry
For the reaction, A = B + C, the rate law is kA]. If it takes 80.0 seconds for 70.0% of a 10.0 gram sample of A to be transformed into products, what is the value of the rate constant? a. 0.00450 s-1 b. 0.0290 s 1 c. 0.00530 s-1 d. 0.0150 s-1 e. 5.40 s-1 chemistry - DrBob222, ...
February 18, 2012

chemistry
The units of a rate constant for zero, first and second order reactions are given in the textbook. If the time units are minutes, what would you expect the units to be for a third order reaction? a. 1/min3 b. mol2/L2-min c. L/mol-min2 d. L2/mol2-min e. L2/mol2-min2 help help! ...
February 18, 2012

chemistry
Given this data in a study on how the rate of a reaction was affected by the concentration of the reactants Initial Rate, RUN #(A, M) (B, M) (C, M) (mol L-1 s-1 1 0.200 0.100 0.600 5.00 2 0.200 0.400 0.400 80.0 3 0.600 0.100 0.200 15.0 4 0.200 0.100 0.200 5.00 5 0.200 0.200 0....
February 18, 2012

chemistry
A reaction has a rate law, rate = kA]B]^2 What is the overall order of the reaction? a. 2 b. 3 c. 0 d. 1 e. 4 chemistry - DrBob222, Friday, February 17, 2012 at 10:53pm The overall is the sum of the orders of each component. still don't get it but guessing A
February 18, 2012

chemistry
The reaction A + B + C = products has a rate law rate = kA]C]2. Which of the following will result in an increase in the rate constant for the reaction? #1 - increasing the temperature #2 - adding a catalyst #3 - doubling the concentration of reactant C a. only one of these (...
February 17, 2012

chemistry
The initial concentration of a reactant in a first order reaction is 0.620 molar. What will be its concentration after 3 half-lives? a. 0.0388 M b. 0.310 M c. 0.0775 M d. 0.155M e. 4.96 M thinkin c if not need a really good explaination of the real answer
February 17, 2012

chemistry
February 17, 2012

chemistry
The half-life of a reaction was found to be inversely dependent on the concentration of the starting material. Thus, we can say that a. the reaction is zero order b. the reaction is first order c. the reaction is second order d. the reaction starts out first order and changes ...
February 17, 2012

physics
A 25mC charge is placed at the end of a meter stick and a 4.omC charge is placed at the 50cm mark.At what position on the line joining the two charges is the electric field zero?
February 3, 2012

Busiuness Law II
Using the Internet, identify three firms that are offering to enter into bailment contracts with customers. 2. For each firm, analyze and describe (a) for whose benefit the bailment would be and (b) the duty that the bailor would owe to the bailee. Be sure to include the ...
August 5, 2010

math
A weight attached to a spring is pulled down 4 inches below the equilibrium position. Assuming that the frequency of the system is 8/pi cycles per second, determine a trigonometric model that gives the position of the weight at time t seconds.
March 31, 2010

math
Determine the length of a pendulum that has a period of 4 seconds.
March 31, 2010

arithmetic
A basket of fruit has 10 oranges,12 apples, and 18 peaches.Express in simplest form the fraction of fruit that are oranges.
December 14, 2009

college
1. A 2. B 3. B 4. A 5. A 6. B 7. A 8. A 9. B 10. B 11. A 12. A 13. A 14. B 15. A 16. B 17. B 18. A 19. B 20. A 21. A 22. B 23. B 24. A 25. A
November 24, 2008

Science
in what 2 waysdo plants contribute to the weathering of rocks
December 4, 2007

Math - Solving Trig Equations