# 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**

dosent answer the question?

*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*

**6 grade math**

u suck

*October 17, 2008*

**Science**

in what 2 waysdo plants contribute to the weathering of rocks

*December 4, 2007*

**Math - Solving Trig Equations**

Is d answer 90degree

*November 21, 2007*

**math**

When you cross multiply you multiply 8 by x and 1240 by 100. Then you get 124000/8 and you get 15500

*February 25, 2007*

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