I am trying that works out average speed for a race. I enter the time (9mins 15sec) and excel tells me it is 9:15am. How do I get it to reconise the time as mins and secs not time of the day

Under the average piston speed, we mean the average speed reached by the piston at certain revolutions. Average - because the piston for a single revolution of the crankshaft virtually stops twice, in the TDC (top dead centre) and BDC (bottom dead centre), to change the direction of movement from bottom to top and vice versa. The main part of the stress on the piston is on its pin: the rupture of the piston at excessive revolutions occurs at this critical point, which is what explains its strengthening.
The linear velocity of the piston is represented by the formula:
V = (C x g): 30
where V is the average speed of the piston, m / s,
C - stroke of the piston, m (stroke in 40 mm is 0,04 m)
g - speed of rotation (rotation), at which it is necessary to determine the average speed of the piston
30 is a fixed number
Studying some engines, including racing, we found interesting things.
The 50 cc engine for a scooter at 8000 rpm has an average piston speed of 10.6 m / s
The 100 cm engine for the ICA card at 21,000 rpm has an average piston speed of 35 m / s

You only need one formula for this.
Total handling time divided by the total number of emails answered.

Take the example of a racing car as pictured in the animation above. It takes the vehicle 10 minutes(0.17 hours) to travel 23km, from start to finish.

Average speed = 23km / 0.17hrs = 135.29km/hr

Average velocity = 4km / 0.17hrs = 23.53km/hr

The average speed is 135.29km/hr but the velocity is only 23.53km/hr. The reason that velocity is lower, is that it can be positive and negative. Remember this from our earlier discussion on velocity? If not,click to refresh your memory. Since the velocity has negative and positive values some will cancel each other out, hence the lower value. Speed, however, can only be positive.

There is a problem with your battery level. Make sure its fully charged. if it does not hold a charge when off the power for at least 2 hours then change it. 99.9% of the time low power delays connection to satellites. the max timke is about 9mins but average 1-2mins .....20 mins is not acceptable. I would suspect the battery.

DO NOT power the unit prior to starting the engine when using DC plug of car This will burn off the IC CHIP and damage your units battery.

ur gass reading is good....
but on my view ur gas expires have u got reading when it pumped.after more than 2 year the gas is expires and doesnot coolling well.. as u says that at highway it cools when the engine get average race the compressor also race upon the engine and get compression right(at high speed) but at low average speed it not work because the gas doesnot compress properly due to gas expiry.....
check new gas......i think u r compressor is good enough if it cools at any time....if compressor dead then it doesnot coll at any time....because the compression valve varssuls are down at bottom......


i think my idea will healp u...good luck.

TRY TO CHECK YOUR CONFIGURATION... OR RE CONFIGURE AGAIN WITH THE CARDS.. MAKE IT SURE THE SETTING IS CORRECT. USERNAME AND PASSWORD YOU ENTERED.

Have you tried pluging it into a different USB port.

please just tell me how it works..............

Here is one way:

In this example, my numbers are in cells a1 through a4. My average is computed with the formula:

=SUM(A1:A4)/COUNTIF(A1:A4,"<>0")

I'm summing the range of numbers and dividing that by the count of nonzero numbers. With this formula, you'll get an error if there are no nonzero numbers.

The Data Analysis Add-in has a Moving Average fuction and wizard. Moving Average