Answer:
We can determine the age of the Earth and the rocks found on Earth with techniques such as measuring ice cores and digging and analysing fossils.
Explanation:
Hopefully this helped!
The answer to your question is B
Imagine a right triangle where the legs represent the horizontal and vertical lengths of the string and the hypotenuse represents the length of the string.
Let us assign some values:
x = horizontal length in feet
50 = vertical length in feet
L = length of the string in feet
Because we are modeling these quantities with a right triangle, we can use the Pythagorean theorem to relate them with the following equation:
L² = x² + 50²
We want to find an equation for the change of L over time, so first differentiate both sides with respect to time t then solve for dL/dt:
2L(dL/dt) = 2x(dx/dt)
dL/dt = (x/L)(dx/dt)
First let's solve for x at the moment in time described in the problem using the Pythagorean theorem:
L² = x² + 50²
Given values:
L = 100ft
Plug in and solve for x:
100² = x² + 50²
x = 86.6ft
Now let's find dL/dt. Given values:
x = 86.6ft, L = 100ft, dx/dt = 4ft/sec
Plug in and solve for dL/dt:
dL/dt = (86.6/100)(4)
dL/dt = 3.46ft/sec
Answer:
568.16J
Explanation:
V = 1.4 m/s
h = 2.15m
H = 12.4m
M = 57.0kg
Fr = 41.0N
Vb = 6.80m/s
g = 9.8m/s²
K.E at the top + P.E at the top + Work done = K.E at the bottom + frictional force.
½mv² + mgh + W = ½mVb + Fr.H
(½* 57 * 1.4²) + (57 * 9.8 * 2.15) + W = (½ * 57 * 6.8²) + (41 * 12.4)
55.86 + 1202.22 + w = 1317.84 + 508.4
1258.08 + w = 1828.24
W = 1826.24 - 1258.08
W = 568.16J
Answer:
I think it would be using a battery recet
Explanation:
