Earthquakes produce three types of seismic waves: primary waves, secondary waves, and surface waves. Each type moves through materials differently. In addition, the waves can reflect, or bounce, off boundaries between different layers.
three key points:
1. they all change the earth by shifting plates in different ways.
2. these waves lead to our plates form today, which are always changing.
3. even the smallest earthquakes make the slightest changes to our ground. and many happen in just a day! we just never feel it.
First of all mass stays the same that never changes.
However when <em>using the force times acceleration (The net force on an object is equal to the mass of the object multiplied by the acceleration of the object. Or some simply say: Force equals mass times acceleration.)</em>
<u>Answer: Force Increases and Mass remains the same.</u>
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<em>Hope this helps! </em>
Answer:
1. Static electricity is caused by the build up of electrical charges on the surface of objects, while current electricity is a phenomenon from the flow of electrons along a conductor.
Explanation:
Answer:
Explanation:
Depression = .75 x 10⁻² m
Load = 120 g
Spring constant = 120g / .75 x 10⁻²
= 160 x 10² g / m
b )
Depression by player
= .48 x 10⁻² m
His weight
= .48 x 10⁻² x 160 x 10² g
= 76.8 kg
So he is eligible.
Answer:
324 people
Explanation:
radius r = diameter / 2 = 45cm /2 = 22.5 cm or 0.225 m
We can calculate the total volume of the log by computing the volume of each cylindrical log:
So the total volume of all 12 logs is
The weight that the raft can support, is the buoyancy force subtracted by its own weight.
The buoyancy force is basically the weight of the water is displaced, which is water density times volume. The log weight is also log density times its volume
where 
are the density of water and raft, respectively. But since we have the specific gravity of wood is 0.6. That measn
Therefore 
Let g = 9.8m/s2. We can now calculate the force that the raft can support
Each person has a mass of 68kg, their weight would be
W = 68*g = 68*9.8 = 666.4N
So the maximum number of people that the raft can hold is
F / W = 216129.2 / 666.4 = 324 people
