# Questions Asked onJuly 23, 2017

1. ## science

an 8 kg and a 16 kg block are suspended at opposite ends of a cord passing over a pulley. compute (a) acceleration of the system (b) the tension in the cord connecting the blocks and (c) the tension in the cord supporting the pulley. The weight of the

2. ## Physics

An elevator weighing 400kg is to be lifted up at a constant velocity of 0.6m/s for this purpose a motor of required horse power is used. (g=9.8m/s).(a)What is the acceleration of motor in case of upward motion? (b)What is power of motor?

3. ## science

A ball is thrown upward from the top of a 35-m tower, with initial velocity of 80m/s at an angle of 25 (a) find the time to reach the ground and the distance from the base of the tower to the point of impact (b) find the magnitude and direction of the

4. ## Biochemistry

Calculate the ph of a 1L solution to wgich has been added 25ml of 10mM acetic acid and 25ml of 30mM sodium acetate

5. ## Chemistry - Stoichiometry/gases

When 2.38 g of methane burns in oxygen, 119 kJ of heat is produced. What is the enthalpy of combustion (in kJ) per mole of methane under these conditions? Your answer will be in kJ/mol. the Molar Mass of methane is 16.04, so I did 2.38g/16.04=0.14838 mol

6. ## math

a sum of money is shared among three brother ,eidest recive 7/13 of it the next recive 2/3 of the remainder. if the youngest brother recive s6 find the sum of money shared

7. ## science

two small conducting spheres have charge 2nc and -0.5nc respectively. When they are placed 4 cm apart ,what is the force between them. If they are brought into contact and then seperated by 4cms. What is the force between them?

8. ## Algebra

Suppose that b is proportional to c, and inversely proportional to the square of d. If b = 45 when c = 40 and d = 2, find b when c =20 and d = 3.

9. ## Child Development

what are steps that can be taken at each level to reduce gender stereotyping in children using Bronfenbrenner’s ecological systems theory

10. ## Chemistry

A 99.99% pure, 0.4903 g sample containing only carbon, hydrogen, and nitrogen is subjected to combustion analysis, resulting in the formation of 1.373 g CO2, 0.2791 g H2O, and 0.1860 g NO. What is the empirical formula of the sample?

11. ## Vectors

the point (3,-4,5), (1,0,5), and (3,1,-2) are three out of four vertices of a parallelogram ABCD. Explain why there are three possibilities for the location of the fourth vortex, and find the point?

12. ## feasibility study on banana plantation in nigeria

feasibility study on banana plantation in nigeria

13. ## science

define photosynthesis

14. ## Physics - Forces in Equilibrium

A beam BC and a cable AB support a weight of 1200lbs. The beam weighs 300lbs. Calculate the tensions in the cable and the reactions of the support C; where A = 30° and C = 45°

15. ## statistics

The owner of a large office building is considering expanding the buildings' daycare center, which all employees of the the building can use and wants to know what the employees think of this idea. A survey is taken by giving a questionnaire to every

16. ## Math

Bret is presently 9 years older than Juan. In 8 years, 6 times Bret's age will equal 7 times Juan's age. What are Bret's and Juan's present ages?

17. ## Physics

A single sphere of water is created by joining 1000 of water spheres of radius r and charge (+Q).If the potential of the small and big spheres are w and v respectively, find v/w. My thoughts : The masses of the spheres are proportional to the third power

18. ## accountancy

Partner A deposit \$1000 to the bank for the duty to be paid by his other partner. This was a loan given by the partner A.The journal entries would be Bank A/C Dr \$1000 Partner A \$1000 (loan given by Partner A) Duty A/C Dr \$1000 Bank A/C \$1000 (duty paid

19. ## To DrBob222

This is regarding the Biochemistry question postef by Grace.. I'm wasn't able to mention this in the subject section due to the large no.of characters! I apologize for any inconveniences made! In this case,to calculate pH of the solution, we should find

20. ## chemistry

If a substance has a concentration of 85 mmol/L and gives 3 particles on ionization, what would be its concentration in milliosmoles per liter?

21. ## maths

O is any point on the side AB of an equilateral triangle ABC. arrange in AC,AO,CO in decending order

22. ## Physics

Why doesn't a magnetic force ALWAYS act on a particle which moves in a magnetic field?

23. ## Science

Measure the pressure of water being 1000kg/m×m×m and density and 40 kg weight on its base?