# cylinder

Popular questions and responses by cylinder
1. ## As physics

The drag force acting on a car travelling at a speed v is given by the equation F=kAv^2 Where A is the area of the front of the car. Show that a suitable unit for the quantity k is kgm-3. Mark scheme answer: F= kgms-2 or A=m2 V=ms-1 Which is K=kgm-3 I am

2. ## physics

To calculate the young modulus uncertainty do you add together the percentage uncertainty of strain and stress and if not then what do u do. Please dont send websites just tell and help me out.

3. ## As physics

Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Calculate the number of free electrons

4. ## chemistry

Carbon tetrachloride, CCl4 is used as a solvent and a coolant. Its boiling point I s-22.9 degrees. By considering the intermolecular forces involved discuss whether you expect the boiling point of CHCL3 to be greater or lower than tis value.  Please

5. ## As physics

Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Calculate the number of free electrons

6. ## As physics

(As physics working out please) Which physical quantity has the same base units as energy? SHOW ALL WORKING OUT! A:Moment B:Momentum C:force D:pressure

Silver plating: A student attempts the process of silver plating to determine the mass of a silver atom. a series of objects are measured, then electroplated for a measure period of time, while maintaining a steady current through a solution of silver

8. ## physics as

the figure below shows the graph of force,F (y axis)acting on a trolley of 0.4kg against time,t (x axis) 20--------- ........._-- ........._...-- ........._....--- ........._......--- ........._.......----- 0........5............9 The velocity of the

9. ## As physics

the figure below shows the graph of force,F (y axis)acting on a trolley of 0.4kg against time,t (x axis) 20--------- ........._-- ........._...-- ........._....--- ........._......--- ........._.......----- 0........5............9 The velocity of the

10. ## As physics

Silver plating: A student attempts the process of silver plating to determine the mass of a silver atom. a series of objects are measured, then electroplated for a measure period of time, while maintaining a steady current through a solution of silver

11. ## As Physics

Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Two copper wires of diameter 1 mm and 2

12. ## As Physics

Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Calculate the number of free electrons

13. ## chemistry

Iodide and diamond crystals both contain covalent bonds and yet the physical properties of their crystals are very different. Their melting points are 387K and 3827K respectively. State this type of structure present in each case and explain why the

14. ## physics As

Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge A piece of fuse wire has a diameter of

15. ## physics As

The current carriers in a piece of semiconducting material have a charge of 1.6 x 10^-19C. Calculate the number of charge carriers entering the material per second when the current is 3 microamps so 3 x 10^-6 amps. ? Please help and do it step by step all

16. ## As physics

Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge Two copper wires of diameter 1 mm and 2

17. ## As physics

Please help and do it step by step all parts of questions and use: T = time(s) I=current (amps) Q=net charge on object (Coulombs) N=no electrons (and write if added or removed from object and how) E=elementary charge A piece of fuse wire has a diameter of

18. ## As physics

The current carriers in a piece of semiconducting material have a charge of 1.6 x 10^-19C. Calculate the number of charge carriers entering the material per second when the current is 3 microamps so 3 x 10^-6 amps. ? Please help and do it step by step all

19. ## As physics

change in mass___total charge_____no of elect for each of______delivered by_______rons pass objects_________circuit(eachtest)_(thrcathod) _____________________________________________0.14____________144__________9 x 10^20___

20. ## Damon/BobPursley/Physicstutor/whichoneisright

Q11.The table below shows how the braking distance x for a car depends on its initial speed u. | u / ms-1 | 5 | 10 | 20 | 40 | | X / M | 2 | 8 | 32 | 128 | The relationship between x and u is: doubling speed increases distance by a factor of 4. i)The

21. ## Physics

Q11.The table below shows how the braking distance x for a car depends on its initial speed u. | u / ms-1 | 5 | 10 | 20 | 40 | | X / M | 2 | 8 | 32 | 128 | The relationship between x and u is: doubling speed increases distance by a factor of 4. i)The

22. ## As physics

Q11.The table below shows how the braking distance x for a car depends on its initial speed u. | u / ms-1 | 5 | 10 | 20 | 40 | | X / M | 2 | 8 | 32 | 128 | The relationship between x and u is: doubling speed increases distance by a factor of 4. i)The

23. ## physics As

The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1. The mark scheme says:

24. ## As physics

There is a right angle triangle: -.- -...- -......- -.........- T (wire) -............- -...............- ------------------ 30 degrees ....--.....--.....rod ....--.....--..... ....--.....--..... ....---------..... ....-.......-..... ....-.......-.....

25. ## physics

do these cancel out and why/why not? S^2 = S^2 S^-2 = S^2

26. ## As physics

A 2.0 rigid rod with negligible weight is subject to forces in three different ways as shown in diagrams 1-3 below. diagrams: 1- middle point: 2.0 N distance on both sides: 1.0 m apart forces below at the end of each side: 1.0 N 2- distance on both sides:

27. ## As physics

(As physics working out please) (SI UNITS) Which physical quantity has the same base units as energy? SHOW ALL WORKING OUT! A:Moment B:Momentum C:force D:pressure

28. ## As physics

What does decreased in MAGNITUDE mean?

29. ## As physics

Describe how the vertical component of the velocity of the water varies form point X to point Z? Image with a flat horizontal line with a curve on top (beg curve: X, top middle curve: Y, End bottom curve: Z) Mark scheme Answer: decreases from x to y

30. ## As physics

How is kinetic energy lost on impact to the ground?

31. ## As physics

The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1. The mark scheme says:

32. ## As physics

In a hockey match a hockey ball is hit 18m from the front of the goal. The ball leaves the hockey stick with initial velocity v at angle theta to the horizontal ground. The ball passes over the goal at a maximum height of 2.0m. The initial vertical

34. ## As physics

In a hockey match a hockey ball is hit 18m from the front of the goal. The ball leaves the hockey stick with initial velocity v at angle theta to the horizontal ground. The ball passes over the goal at a maximum height of 2.0m. The initial vertical

35. ## As physics

The drag force acting on a car travelling at a speed v is given by the equation F=kAv^2 Where A is the area of the front of the car. Show that a suitable unit for the quantity k is kgm-3. Mark scheme answer: F= kgms-2 or A=m2 V=ms-1 Which is K=kgm-3 I am

36. ## As physics

The table below shows how the braking distance x for a car depends on its initial speed u u / ms-1 5.0 10 20 4 x / m 2.0 8.0 32 128 the reaction time of a driver is 0.60s. Calculate the sopping distance of the car when u= 30ms-1. The mark scheme says:

37. ## As physics

How is kinetic energy lost on impact to the ground?

38. ## As physics

What does collision is INELASTIC mean?

39. ## As physics

Image with a flat horizontal line with a curve on top (beg curve: X, top middle curve: Y, End bottom curve: Z) Describe how the vertical component of the velocity of the water varies form point X to point Z? Mark scheme Answer: decreases from x to y

40. ## As physics

What does decreased in MAGNITUDE mean?

41. ## physics

A 2.0 rigid rod with negligible weight is subject to forces in three different ways as shown in diagrams 1-3 below. diagrams: 1- middle point: 2.0 N distance on both sides: 1.0 m apart forces below at the end of each side: 1.0 N 2- distance on both sides:

42. ## physics

an ostrich can run a maximum speed of 70km per hour. You have to convert the 70km to 70000m. you have to convert the per hour part too and 1hr =60 min. Somehow the time becomes 3600, could someone please tell me how?

1. ## physics as

no its 10-7 as in it equals to 3 AND you minus it, its not a power. Please post hrelp with this in mind

posted on January 8, 2018

You said: "tap water" but more likely, what are the units for the accepted and the measured? I said: I dont know it doesnt say but those are the 2 values for a single silver atom if that helps you figure out the units. you said: No, I know the units, the

posted on January 8, 2018
3. ## As physics

So is all this what i should right? i dunt know which bit is relevant as so much stuff comes up and i dont know what to link and what is required of me to write, now that i have given it a go could you please help

posted on January 5, 2018
4. ## As physics

Thank you so much both of you really helpful!! :)

posted on January 5, 2018
5. ## As physics

posted on January 4, 2018
6. ## As physics

Lead pipes. For many centuries, water pipes were made of lead, because of its ease of processing and durability. ... Most of the lead pipes that exist today are being removed and replaced with the more common material, copper or some type of plastic.

posted on January 4, 2018
7. ## As physics

nothing comes up useful when i write:why is the mass of a silver atom higher than expected and im not sure what to write please help me more

posted on January 4, 2018
8. ## As physics

1) Tap water is water supplied to a tap. Its uses include drinking, washing, cooking, and the flushing of toilets. 2) Today, most plumbing supply pipe is made out of steel, copper, and plastic; most waste (also known as "soil") out of steel, copper,

posted on January 4, 2018
9. ## As Physics

in which wire will the electrons move faster and why?

posted on January 4, 2018
10. ## As Physics

posted on January 4, 2018
11. ## As physics

i figured out that f x change in t =change in p is the equations used and nowi understand that bit so it became: change in momentum= 20 x 5=100 change in momentum= 1/2(20x4)=40 i just dont get the 10-3 bit

posted on January 4, 2018
12. ## As physics

The "10-3" bit especially confuses me as i dont know where those number came from and wat it is for/ wat equation

posted on January 4, 2018
13. ## As Physics

i cant find the numbers for the equation yo gave me "NUMBER electrons per lenth=electron dinsity)*area"

posted on January 4, 2018
14. ## As Physics

is there a way to work this out?

posted on January 4, 2018
15. ## As physics

I dont know it doesnt say but those are the 2 values for a single silver atom if that helps you figure out the units.

posted on January 4, 2018
16. ## Physics

and one of the options is right so do that working out to find out which one

posted on January 4, 2018
17. ## Physics

54(9.8*sin15+1.2) will show you the option it is

posted on January 4, 2018
18. ## Physics

Choose from the options below:( to get you thinking) A 202 N B 222 N C 242 N D 262 N

posted on January 4, 2018
19. ## math

Given, Diameter = 21m, cost of the rope = Rs 4 per meter, length of the rope required to fence the garden two round=?, Cost of the rope = ? The length of rope required = 2 × circumference. Circumference = 2 π r = π D = (22/7) × 21 = 66 m Therefore,

posted on January 4, 2018
20. ## Science

dGorxn = (n*dGo products) - (n*dGo reactants

posted on December 14, 2017
21. ## trigonometry

θ = s/r = (6 m)/(5/2 m) = 12/5 radians = 2.4 radians r = s/θ = (60 ft)/(3π/2) = 40/π ft ≅ 12.732 ft

posted on December 14, 2017
22. ## As physics

posted on December 13, 2017
23. ## Science

How old the object containing the element is.

posted on December 12, 2017
24. ## Damon/BobPursley/Physicstutor/whichoneisright

This is the clearest explanation given for this thread thank you. But may I ask what equation you used at the beginning as I can’t seem to find it when I searched it online but at first I thought it was d=vt but b=velocity isn’t squared in this

posted on December 8, 2017
25. ## Physics

posted on December 7, 2017
26. ## Physics

i also dont get how to work out damons last line if his is right

posted on December 7, 2017
27. ## Physics

Damon said: v = Vi + a t where t is AFTER 0.6 s v = 30 + a t so x = Xi + Vi t + (1/2) a t^2 a will be negative of course Xi is 18 when t = 0 x = 18 + 30 t + (1/2) a t^2 -i dont know what xi means -if this wiill result in yuor answer or the mark scheme

posted on December 7, 2017
28. ## Physics

Please tell me what you think of the mark scheme answer what they did and if now looking at this mark schee answer you stillthink that it is wrong and your answer is right? just as i want to make sure my notes are right.

posted on December 7, 2017
29. ## physics

Please just tell me if I AM right or wrong because the website wont do that. I think I: -add percentage uncertainty of stress and strain together (i think this is the total percentage uncertainty so the young modlus unceratinty??) -then i use this

posted on December 7, 2017
30. ## Physics

Thank you, finally someone who answered, I have been waiting ages for this questions answer. So you saying that your 100 percent sure that is the answer and the mark scheme which the examiner made is wrong?? This is what the mark scheme said for braking

posted on December 7, 2017
31. ## As physics

I reposted like you asked and i included the full question and my working out and what i need help with so pplease help

posted on December 5, 2017
32. ## math/science

not 0

posted on December 5, 2017
33. ## math/science

60

posted on December 5, 2017
34. ## math/science

the cars acceleration is zero

posted on December 5, 2017
35. ## physics As

by the wa for the table 5 is above 2 10 is above 8 andso on the space i leftr arent posted/shown

posted on December 5, 2017
36. ## physics As

Q11.The table below shows how the braking distance x for a car depends on its initial speed u. | u / ms-1 | 5 | 10 | 20 | 40 | | X / M | 2 | 8 | 32 | 128 | The relationship between x and u is: doubling speed increases distance by a factor of 4. i)The

posted on December 5, 2017
37. ## physics As

posted on December 4, 2017
38. ## physics As

What i think s dunno u 30 v dunno a 9.81 t dunno someone used the equation v=u+at and s=ut+1/2at^2 if t is zero then i think v is 30 after putting the numbers in. then.. oim confused using suvat and where the numbers came from please help

posted on December 4, 2017
39. ## As physics

...........---y---- .........----------- ......------------------- ...-------------------------- . x----------------------------z is the picture

posted on November 9, 2017
40. ## physics

do the same positive power 2 on both sides cancel out or the opposite - and + powers

posted on November 9, 2017
41. ## As physics

I am in as and we dont use those symbols so im confused

posted on November 9, 2017
42. ## As physics

and equal on both side

posted on November 9, 2017
43. ## As physics

It looks kinda like the last image i posted but its a curve

posted on November 9, 2017
44. ## As physics

...........---y---- .........----------- ......------------------- ...-------------------------- . x----------------------------z

posted on November 9, 2017
45. ## As physics

Y -- - -- --- - - ----- -- - -------------- - - ----------------- - X Z

posted on November 9, 2017
46. ## As physics

Y - - - - - - - - - - X Z

posted on November 9, 2017
47. ## As physics

I wrote what I do know and the caps lock is what I dont know, and that is the working out for braking distance shown above is confusing to me.

posted on November 9, 2017
48. ## As physics

I think this is because of no movement...??

posted on November 9, 2017
49. ## As physics

Here I've already written what I thought of the question in caps lock and the thing I dont know at the bottom.

posted on November 9, 2017
50. ## As physics

I think magnitude means how much of something or how long the sides are or the angle.

posted on November 9, 2017
51. ## As physics

I'm am very stuck on this one so I dont have working out and need all steps.

posted on November 9, 2017
52. ## As physics

I know 1 is in equilibrium. 2 is not. 3 I'm not too sure about.

posted on November 9, 2017
53. ## As physics

So would collision is ELASTIC mean: the two objects don't stick together and move with different velocities? ?????

posted on November 8, 2017