It must be clean paper towel
Answer:
In 1 hour it will cover a distance of 15°
Explanation:
We know that for each rotation earth takes 24 hour
In 24 hour its travels 360° of rotation
We have to find how much we travel in 1 hour in degree
We know that 1 rotation = 360° which is completed in 24 hours
So distance traveled in 1 hour in degree will be = 
So in 1 hour it will cover a distance of 15°
A tack weld must be correctly applied so that it is strong enough to hold the assembly and still not interfere with the finished welding.
Welding could be a fabrication method whereby 2 or additional elements are consolidated along by suggests that of warmth, pressure or each forming a be part of because the elements cool. fastening is typically used on metals and thermoplastics however also can be used on wood.
The tack weld ought to be robust enough to resist forces to that it should be subjected. The tack welds ought to be fitly sized so they'll manage the load of the elements that they're holding. Tack welds are usually created once the assembly is being preheated as preparation for the final welding process.
To learn more about Welding here
brainly.com/question/21049525
#SPJ4
They show the most important substances as it can show how they reac in a chemical and how they are able to react
<span>Students with big smiles had the
longest lifespan, followed by those with partial smiles, and then by those with
no smiles.</span>
An examination by specialists at Wayne College in Michigan,
America proved that being happy can extend your life span. They arrived at
their decisions by examining 230 pictures of baseball players from the 1952
baseball enroll. Of the 184 players who
had since passed away, those in the "no grin" area experienced a
normal of 72.9 years while the "incomplete grin" bunch lived to
around the age of 75.
Those with the most stretched out smiles experienced a
normal of 79.9 years – an entire seven a greater number of years than their
gloomy partners.
