# Rilwan

Newest questions and responses by Rilwan
1. ## Physics

A spring of force constant 1500N/M is acted upon by a constant force of 75N.Calculate the potential energy stored in the spring.

2. ## Probability

If event A=(drawing a king) and event B=(drawing a red card).what is the probability of drawing A or B

3. ## Calculus

d^2y/dx^2=10-3x find dy/dx+c

4. ## Maths

Tom is twice as old as Mary,but he is two years younger than Jim.What is Mary age if Jim will be twenty years old in two years time?

5. ## Physics

If 0.022 kg of ice at 0C is added to 0.450 kg of water at 80C, what is the final temperature. (Assume that there is no heat lost to the surroundings.)

6. ## Maths

The market price of a box of sweets is #2800.A customer is given a 4% discount for purchasing 40 boxes.How much did the customer pay

7. ## Physics

A uniform capillary tube closed at one end contained dry air trapped by a thread of mercury 8.5×10^-2m long.When the tube was held horizontally the length of the air column was 5×10^-2m,when it was held vertically with the closed end downwards the length

8. ## Physics

A uniform capillary tube closed at one end contained dry air trapped by a thread of mercury 8.5×10^-2m long.When the tube was held horizontally the length of the air column was 5×10^-2m,when it was held vertically with the closed end downwards the length

9. ## Maths

A uniform capillary tube closed at one end contained dry air trapped by a thread of mercury 8.5×10^-2m long.When the tube was held horizontally the length of the air column was 5×10^-2m,when it was held vertically with the closed end downwards the length

10. ## Maths

A and B are points on the parallel of latitude 58.4N their longitudes being 148W and 32E respectively.What is their distance apart (a)along the parallel of latitude (b)along a great circle

11. ## Physics

A thread of mercury of length 15cm is used to trap some air in a capillary tube with uniform cross sectional area and closed at one end.With the tube vertical and the open end uppermost,the length of the trapped air column is 20cm.calculate the length of

12. ## Physics

A gas occupies 8 litres at 23'C and 70cmHg what is the volume at stp

13. ## Physics

A fixed mass of gas of volume 600 cm cube at a temperature of 27 C is cooled at constant pressure to a temperature of 0C.what is the change in volume

14. ## Physics

A wire length 2m and radius 1mm is stretched by 25mm on application of a force of 1000N.Calculate the young modulus

15. ## Physics

A wire length 2m and radius 1mm is stretched by 25mm on application of a force of 1000N.Calculate the young modulus

16. ## Maths

Find the square root of 12-22square root 2

17. ## Maths

What is the vertex of a cone

18. ## Maths

The difference between the digits of a two digit number is 1.The number itself is 1 more than 5 times the sum of its digits.If the units digits is greater than the tens digit,find the number.

19. ## Maths

The 90 men that visited a restaurant take one of either pounded yam,rice and amala.10 take pounded yam and rice,19 take rice and amala and 29 take pounded yam and amala.x men take all the three menu.2x men each take only one food item.how many take all

20. ## Maths

M and N are the midpoints of opposite sides of square ABCD.A point is selected at random in the square.find the probability that it lies in traingle ADM but not in triangle ADN

21. ## Maths

In a large crowd,there are three times as many men as women.Three people are chosen at random.Assuming that there are so many people that choosing three has a negligible effect on the proportion of men to women,find the probability that they are (a) all

22. ## Chemistry

A compound F on heating give a cracking sound and G give a reddish brown fumes when hot, and yellow when cool, and a gas H light a glowing splint and a residue J. Identify F,G,H,J. What is the name of that crack sound and the name of the compound?

23. ## algebra

Au/AUB/=A, A/uBuC/=/AuB/n/AuC/

1. ## Probability

But the colour of the king not specified and don't forget there are 4 kings in a playing cards.2 red kings and 2 black kings

posted on January 10, 2019
2. ## Physics

A thread of mercury of length 15cm is used to trap some air in a capillary tube with uniform cross sectional area and closed at one end.With the tube vertical and the open and uppermost,the length of the trapped air column is rock.calculate the length of

posted on February 18, 2018
3. ## Maths

Could you help me with the problem?

posted on September 17, 2017
4. ## Maths

The final answer is 37....The solution u gave was 21

posted on March 25, 2017