A. How much work is being done to hold the beam in place?
Work is the product of Force and Displacement. Since there
is no Displacement involved in just holding the beam in place, hence the work
is zero.
B. How much work was done to lift the beam?
In this case, force is simply equal to weight or mass
times gravity. Hence the work is:
Work = weight * displacement
Work = 500 lbf * 100 ft
Work = 50,000 lbf * ft
C. How much work would it take if the steel beam were
raised from 100 ft to 200ft?
The displacement is still 100 ft since 200 – 100 = 100 ft,
hence the work done is still similar in B which is:
<span>Work = 50,000 lbf * ft</span>
Answer:
Temperature -SI unit :Kelvin
Explanation:
Kelvin is the SI unit of Temperature .
- Don't get confused and write Celsius as the SI unit .Celsius is not the SI unit .
Or
Lets take an example :-
Lets convert to Kelvin scale
- SI unit of Mass=kilogram(Kg)
- SI unit of Time=second(s)
- SI unit of electric current=Ampere(A)
A large elliptical galaxy. Hope this helped
Answer:
Explanation:
Standard International (SI) units of measurement is the acceptable global units of measure for physical quantities. they are majorly fundamental units.
Thus,
(a) The mass of a sport car is measured in kilograms (kg).
(b) The distance from your home to your school is measured in meters (m).
(c) The mass of an elephant is measured in kilograms (kg).
(d) The diameter of a large pizza is measure in meters (m).
(e) A semester at your school is measured in weeks.
(f) The time for light to travel from the sun to the earth is expressed in seconds (s).
(g) The time it takes to fly from New York to California is in seconds (s).
(h) Your mass is measured in kilograms (kg).
(i) The length of the Prime Meridian is expressed in meters (m).
(j) Your height is expressed in meters (m).
1.the sun must be lined up with the moon and earth all must be aligned for this to happen
