# Questions Asked onMay 13, 2018

1. ## Physics

a metal ball of radius R is placed concentrically inside a hollow metal sphere of inner radius 2R & outer radius 3R. The ballis given a charge +2Q and the hollow sphere a total charge -Q. Calculate. electrostatic potential energy of system.???

2. ## Life orientation

Identity and explain four type of risk behaviour amongst teenagers by using an example

3. ## Math

An Ice cream shop offers the following toppings: chocolate chips strawberry sprinkles caramel hot fudge whipped cream gummy bears If a sundae must have exactly four topping how many different sundaes can you make? 15 24 This one 12 18 Eric has two

4. ## Math

The sample space for a roll of two number cubes is shown in the table. (1,1)|(1,2)|(1,3)|(1,4)|(1,5),(1,6) (2,1)|(2,2)|(2,3)|(2,4)|(2,5)|(2,6) (3,1)|(3,2)|(3,3)|(3,4)|(3,5)|(3,6) (4,1)|(4,2)|(4,3)|(4,4)|(4,5)|(4,6) (5,1)|(5,2)|(5,3)|(5,4)|(5,5)|(5,6)

5. ## Geography

What will happen when we move vertically upwards the earth?

6. ## physics

15.1 1 Section L I A 50 mL beaker is filled to the brim with mercury. How much does the mercury in the beaker weigh?

7. ## physics

Explain why ice is formed on the aluminium lumps and not on the walls of the beaker

8. ## Algebra

List the sides in order from shortest to longest in xyz with m

9. ## physics

Explain why food can be cooked more rapidly by boiling it in salt water than by boiling it in pure water

10. ## physics 11

An arrow is shot horizontally towards a target 20 m away. In traveling the first 5 m horizontally, the arrow falls 0.2 m. In traveling the next 5 m horizontally, what will the arrow additionally fall?

11. ## physics

Explain the statement: the saturation vapour pressure of water at 60 degree Celsius is 149.4 mm of Mercury. Thanks

12. ## physics

A concrete slab of mass 400 kg accelerates down a concrete slope inclined at 35°. The u kinetic bn the slab and slope is 0.60. Determine the acceleration of the block.

13. ## maths

the distance from you to the base of a tower on top of a hill is 2760 ft. the angle of elevation of the base is 26 degrees the angle of elevation of the top of the tower is 32 degrees.find the nearest foot the height of the tower above the top of the hill

14. ## maths

We define two numerical operations labelled T and R. The effect of T is to add 1 to a number. For example, if we apply the operation T to the number 2 three times in a row, we obtain 3, then 4, then 5. The effect of R is to find the negative reciprocal of

15. ## physics

Two blocks with masses 5 kg and 2 kg are connected (via frictionless, massless pulleys) by a light, inextensible string, as shown. There is no friction between the 5 kg block and the horizontal surface on which it moves. The tension T in the string

16. ## physics

How would you determine the value of the specific latent heat of steam in the laboratory? What precautions are necessary to obtain an accurate results

17. ## physics

What is meant by the statement that the specific latent heat of steam is 2260000jkg

18. ## physics

Describe an experiment to determine the saturation vapour pressure of water in the temperature range 25 degree Celsius to 70 degree Celsius. Sketch the curve you would expect to obtain

19. ## Physics

if water rises in a capillary tube 5.8cm above the free surface of the outer liquid. what will happen to the mercury level in the same tube when it is placed in a dish of mercury?(diagram is also necessary)

20. ## math

Find the sum of the first 15 terms of the geometric sequence. ∞ Σ 3n − 1 n = 1

21. ## Algebra

A total of 23,456.78 dollars was invested in two funds paying 2½ percent and 1¾ annual interest. The combined interest for the year percent is 368 dollars and 50 cents. Part A: How much of the 23,456.78 dollars is invested in 2½ percent fund? Part B:

22. ## math

hello, im in 3rd grade and i need help on these 2 questions. 1) What is 3 as a percentage of 10? 2) The nth term rule for a sequence is 2n+3. Write the first 4 terms in this sequence. is question 1 30% thanks if you reply

23. ## maths

A landscaper sights the top of a tree at a 68 degree angle.she then moves an additional 70 feet directly away from the tree and sights the top at a 43 degree angle.how tall is the tree to the nearest tenth of a foot.

24. ## Maths

A certain number of children shared 42 sweets,each child got 8 sweet how many children shared the sweet?

25. ## chemistry

0.1 mol of HCl is added to 1 L of water. What is [H+] and [OH-]? Thank you!

26. ## world history

Which key factor does not affect the climate in Latin America’s mountain regions?

27. ## chemistry

How much 0.020 M Ba(OH)2 is need to titrate 25.0 mL of 0.0030M HCl to the endpoint? I'm so confused; please help!

28. ## Chemistry

5.00 g of (Zn) was added to 0.800 moles of nitrate ion in acidic media. Calculate the volume of (NO) gas collected at STP. Zn(s) + No3^-(aq) ---------> ZN^2+(aq) + NO(g) (Must balance the reaction first). Thank you.

29. ## physics

The mass of a rocket car plus fuel is 2,000 kg. The rocket car starts from rest. The engine expels fuel (in the form of exhaust) over a period of 8 seconds. The exhaust has a velocity of 1,000 m/s due west, and the velocity of the rocket after 8 seconds is

30. ## physics

Pls is specific capacity of tin 226 j.kg/k

31. ## geography

What is glacier

32. ## computer

What is the formal name of Internet

Hello! can anybody help me for my assignment about request letter.... Assumed that your manager has asked you to write a request letter to another professional from another company. you will be requesting that this person guest speak at your organization

34. ## multimedian

you are given chance to be a designer of any company of your dreams and the condition is to make a description of the design process you will follow to get the two dimension art for the company about any topic of your choice. Competence criteria are as

35. ## SOCIAL STUDIES

WHAT IS TWO LIMITATIONOF FUNDAMENTAL HUMAN RIGHT

36. ## math

Find the sum of the infinite geometric series, if possible. 12 + 10 + 25/3 + 125/18 + ...

37. ## math

Find the sum. (Round your answer to two decimal places.) 5 Σ 200(1.09)^n n = 0