Answer:
uncertainity = 0.0000001%
the no of significant figures need to have is eight
Explanation:
given data:
satellite distance from earth = 20000 k = 20,000,000 m
we know that percntage of uncertainity of 2m can be calculated as
uncertainity = 0.0000001%
the range of satellite from your location from km to m is
(20,000,000m -2m) to (20,000,000m + 2m) = 19999998 m +20,000,002 m)
the no of significant figures need to have is eight
Answer:
It was most likely static electricity
Explanation:
Static electricity comes down to the interactive force between electrical charges.
So because your computer charger has electricity the foil is a conductor so the sparks were most likely static electricity
A common dry-cell battery is the zinc-carbon battery, which uses a cell that is sometimes called the Leclanché cell. The cell is made up of an outer zinc container, which acts as the anode
Answer:
Explanation:
We apply Newton's second law:
∑F = m*a (Formula 1)
∑F : algebraic sum of the forces in Newton (N)
m : mass in kilograms (kg)
a : acceleration in meters over second square (m/s²)
Problem development
M1 free body diagram : Look at the attached graphic
∑F = m₁*a
W₁ -T= m₁*a
W₁ - m₁*a = T Equation 1
M2 free body diagram :Look at the attached graphic
∑F = m₂*a
T-W₂= m₂*a
W₂ + m₂*a = T Equation 2
Equation 1 = Equation 2
W₁ - m₁*a = W₂ + m₂*a
W₁ - W₂ = m₁*a + m₂*a
m₁*g -m₂*g = a* (m₁ + m₂)
a = (m₁*g -m₂*g) / (m₁ + m₂)
Calculation of the tension in the rope (T)
We replace a in the equation 2
W₂ + m₂*a = T
W₂ + m₂*g*(m₁ -m₂) / (m₁ + m₂) = T
m₂*g + m₂*g*(m₁ -m₂) / (m₁ + m₂) = T
m₂*g( (1+ (m₁ -m₂)) / (m₁ + m₂) = T
m₂*g (1+m₁ -m₂) / (m₁ + m₂) = T
D make one revolution around the sun hope this helps