a)
The acceleration due to gravity at a certain location on Earth is given by
where
G is the gravitational constant
M is the Earth's mass
R is the Earth's radius
h is the altitude above the Earth's surface
At the top of Mt. Everest,
R = 6380 km =
With
(1)
At the Earth's surface,
R = 6380 km =
h = 0
g = ?
So
(2)
By doing the ratio (2)/(1), we find an expression for g in terms of g':
And therefore,
b) 519.3 N
The weight of an object near the Earth's surface is given by
where
m is the mass of the object
g is the acceleration of gravity at the object's location
In this problem,
m = 50 kg is the mass of the object
g' = 9.77 m/s^2 is the acceleration of gravity on top of Mt Everest
Susbtituting,
The higher the surface area of a solid, the faster its reaction rate with a gas, the lower the surface area, the slower the reaction rate.
The layers that make up the upper mantle are the following.
- The lithosphere and the asthenosphere.
- The lithosphere and the asthenosphere are the layers that make up the upper mantle.
- The rocky outer part of the Earth is called the lithosphere.
- It is very rigid, solid, and it is not as hot as the other parts.
- According to scientists, its thickness is about 90 to 100 kilometers from the surface of the earth.
- The layer of the Earth that moves the lithospheric plates is called the asthenosphere.
- Lithospheric plates are 60 miles long on average and are composed of continental crust.
We conclude that the lithosphere and the asthenosphere are the layers that make up the upper mantle. The new lithosphere is being created at oceanic ridges due to plate tectonics. Yes, planet Earth is getting larger constantly.
Learn more about this topic here:
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Answer:
0.184 m/s
Explanation:
Momentum is conserved. If the velocity of the 0.24 kg mass is positive, then ...
m1v1+m2v2 = m3v3
(0.24 kg)(0.60 m/s) +(0.26 kg)(-0.20 m/s) = (0.24 +0.26 kg)(v)
v = (0.144 -0.052 kg·m/s)/(0.50 kg) = 0.184 m/s
The speed of the combined masses is 0.184 m/s.
_____
<em>Additional comment</em>
The positive sign indicates the combined masses are moving in the direction of the original 0.24 kg mass.
Answer:
C) Amplitude.
Explanation:
By definition, the amplitude of wave is defined as the distance from the rest position to the highest or lowest point of the wave.
The highest and lowest points of the wave are called crests and troughs respectively; Therefore, the amplitude of the waves is also said to be the height of the wave from its rest position to its crest—and also the height of the from the rest position it its trough.
This means Choice C (amplitude) is the correct term used to describe the height of a wave from its rest position to its crest.
<em>P.S: Choice A, the crest height, can also be the correct term, but the term ''amplitude'' is often used and is more technical. </em>