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slow
In everyday use and in kinematics, the speed (commonly referred to as v) of an object is the magnitude of the rate of change of its position with time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity. The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero.
Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second (m/s), but the most common unit of speed in everyday usage is the kilometre per hour (km/h) or, in the US and the UK, miles per hour (mph). For air and marine travel the knot is commonly used.
The fastest possible speed at which energy or information can travel, according to special relativity, is the speed of light in a vacuum c = 299792458 metres per second (approximately 1079000000 km/h or 671000000 mph). Matter cannot quite reach the speed of light, as this would require an infinite amount of energy. In relativity physics, the concept of rapidity replaces the classical idea of speed.
Hey all,
I have a bit of a leak in a pipe between the pump and thermostat in my airing cupboard. I'm due to ring a plumber I've been given a number for but does anyone know if this is a quick job to fix and how much it might be? I assume it's a straight forward replacement of pipe?
Thanks
Liz
Liz
Thread
about
airing
better
cupboard
leak
parts
pipe
should
slow
I hope someone can help with this. The hot taps in our bathroom (sink and bath) both have a similar problem (bath is worse than sink). Our water is heated by a combi boiler. When the taps are first turned on, and the cold water from the pipes is running through they flow fine, but as the hot...
graham_f
Thread
boiler
hot
hot water
other
problem
running
slow
through
water
Hi Guys
A customer called me out this week after having just turned on their CH, usual story rads not too hot. I've bled them and released a lot of air which did the trick, but not for long. The pump is working fine, The rads nearest the HW cylinder are constantly hot but as i follow them down...
Hi all hope you can help me,
I've got a Baxi 105e which has been running great until lately.
The hot water started running really slow and the pressure started to constantly drop. With investigation I found it needed a new expantion vessel.
I fitted an external tank successfully but still...
Hi everyone
I'm just after some advise about the fault I have with my boiler.
The boiler is taking over 5 minutes to fire up no matter which function is selected ie water only or water and heating.
Today an engineer has replaced the diaphragm, which did need replacing anyway and there is no...
upxc14
Thread
baxi
combi
engineer
fire
replacing
slow
water
which
I'm having trouble with this forum and the tilers forum, they are soooo slow at loading and its becoming a real pain. If I click on a thread, the page loads in the normal time but I cant scroll down until it say 'done' at the bottom left of the screen and there is a small green progress bar...
Hi, I am new to this so bear with me. I have a problem with the cold water supply to my tank in the loft, the water coming into the house normally and the kitchen sink is in full flow but somehow between there and the tank it slows to a mere trickle and we are using the water before the tank...
zena591
Thread
cold
cold water
cold water tank
filling
first
hello
slow
tank
water
water tank
Hi all,
Got a w/c that seems really slow to flush. When flushing water pressure not great but still get a bad smell after flushing and slow to drain. Does this sound like diaphragm change AND perhaps an obstruction? Gubbins inside cistern seem your average type, flush valve and inlet. What...
Hi,
I have just had a Roca Thesis basin mixer installed and I'm not convinced that the flow rate is what it should be.
It's not a trickle but given my hot water system is unvented main pressure, I would have expected much better.
Does the flow rate decrease dramatically with the use of...
minty88
Thread
basin
copper
flow
flow rate
hot
hot water
hot water system
main
mixer
pressure
roca
slow
system
tails
unvented
water
I have a slight problem with a monobloc tap in the kitchen! The hot tap is stiff to turn and when it is tuned takes more of a turn to let water flow than the cold. Also the water has a poor flow rate! Am I right in sayin the tap needs re-seating or shud i just replace it?
truemanufan
Thread
cold
cylinder
flow
head
hot
job
kitchen
merchant
open vented
plumbers
pressure
remove
slow
tap
unvented
washer
I am working on a WC draining through a horizontal soil pipe (about 10 ft with 1" fall can't get any greater than this due to shallow floor joists) this then exits into a vertical stack. There are no blockages and air is entering stack. My problem is a that the WC fills almost to the rim before...
I have a mixer tap in the kitchen and there is a problem in that when I turn on the hot tap (quarter turn valve) there is often up to a 15 second delay before any water comes out. There is no problem with the mains cold and the hot is fed from the cylinder which is upstairs and about 12 feet...
patters_uk
Thread
bar
bungalow
cistern
cold
cylinder
flow
guage
head
high
hot
hot water
mixer
pipe
plumber
pressure
pressurised
pump
slow
start
system
tap
taps
test
valve
vent
water
Hi there
I live in a single-floor maisonette with a loft. In the loft is our water tank. My toilet is taking an exceptionally long time to fill - I move the ball up and down and it doesn't seem to have any real effect on the amount of water coming into the cistern.
My water tank is...
tomcorrigan
Thread
bath
blockage
cistern
cold
connect
empty
flushing
hose
inside
loft
making
noises
oil
pipes
plumber
pressure
problem
refill
shower
slow
supply
system
tank
tap
toilet
valve
water
water tank
work
We have installed a unvented system at 1600mtrs high in the alps,we have an lpg system boiler, a 300 litre cylinder, underfloor heating.
The cylinder heats pretty quickly to 50deg then takes about an hour to heat the last 10 deg to 60deg,i suspect the incoming cold water is colder than normal at...
j woodcock
Thread
boiler
burner
central heating system
cold
cold water
cylinder
find
heat
high
pressure
question
slow
system
underfloor
underfloor heating
unvented
water
:) I have a shower 5yrs, :( recently it has been slow draining.
The hunter pvc Compact shower trap is the original. I have removed the grid/trap and viewed the main body but cannot see any outlet!
:confused: Am I missing something, I have tried to clear from outside but no success.
What can I...
Some people say that 10mm pipe is better for central heating systems but I find that it makes them very inefficient as the radiators take a very long time to fill up with such a narrow bore and therefore become less efficient as the boiler is still on full no matter how quick the rads are...
perfect plumb
Thread
10mm
boiler
building
central
central heating system
cold radiator
damage
fitting
flow
flushing
hot rads
inside
leak
pipe
pipes
problem
radiators
sealed
slow
sludge
system
thermostatic
trv
valve
wall
work
Hi All
I've just changed my separate bathroom taps for a mixer.
The HW is gravity fed and the cold is mains so I guess I could have expected problems...
But actually it works OK, except for one thing. When I first turn the hot on, sometimes I need to wait for ages (several minutes) before...
strubbly
Thread
air
cistern
cold
cylinder
expansion
flow
hose
hot
hot water
mixer
mixer tap
mixers
pipe
pressure
problem
pump
screw
slow
start
supply
tap
taps
vent
water
work
Hi,
I have a a shower/mier tap set which I bought from Homebase and had fitted by a plumber about 2 years ago (Chrome Victorian Bath/Shower Mixer > on their website).
The hot water tap is running very slowly, almost a dribble. Other hot taps in my house are running OK, so I assume it is...
jhatter
Thread
boiler
brass
damage
flow
free
hot
hot water
mixer
mixer tap
novice
plumber
pressure
problem
remove
screw
shower
slow
tap
taps
washer
water
water tap
website
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