Answer:
D. 803 lbs
Explanation:
In order to find the compressive stress on all three blocks we first need to find the normal surface area of each:
Surface Area of 1 Block = 3.5 x 3.5
Surface Area of 1 Block = 12.25
Surface Area of all 3 Blocks = A = 3 x 12.25
Area = 36.75
Now, the stress is given by the following formula:
Stress = Force/Area
Stress = 29500 lbs/36.75
Stress = 802.72 lbs
Hence, the correct option will be:
<u>D. 803 lbs</u>
Answer:
870 N
Explanation:
The expression for velocity of wave in a string is given below
v = 
, T is tension and m is mass per unit length .
m = 45 x 10⁻³ / 30 x 10⁻²
= .15 kg/m
Putting the given values in the equation
76 = 
T = 76² x .15
= 866.4
870 N approx.
Answer:
The Geomagnetic North Pole, a related point, is the pole of an ideal dipole model of the Earth's magnetic field that most closely fits the Earth's actual magnetic field. The North Magnetic Pole moves over time according to magnetic changes and flux lobe elongation in the Earth's outer core.
Answer: 12756000 m
Explanation:
In fact the actual diameter of the Earth is approximately 
not 
. So, let’s work with the first one.
A kilometer is equivalent to 1000 meters:
Knowing this, we can make the conversion:
This is Earth's diameter in meters
