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3 years ago

What are the three types of seismic waves? which one does the most damage to property?

1 answer:

6 0

In an earthquake, three basic types of seismic waves are created: P-waves, S-waves and surface waves. P-waves or primary / pressure wave and S-waves or secondary / shear wave are collectively called body waves. But the surface waves does the most damage to property as it can be much larger in amplitude.

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6. A lumberjack is standing on a log floating on a lake. She starts from rest, then runs along the log to the end, when she jump

scoray [572]

Answer:

a) -3.267 m/s

b) 2.227 m/s

Explanation:

As per the conservation of momentum

m1v1 + m2v2=0

m1= mass of log

m2 = mass of lumber jack

v1 = velocity of log

v2 = velocity of lumber jack

a) Velocity of first log

$-\frac{70*7}{150} = -3.267$ m/s

b) m1v1 + m2v2 = m3v3

Velocity of log

= $\frac{70*7}{150+70} \\2.227$

4 0

2 years ago

Graph are pictorical representations of

inn [45]

Answer:

Graphs are pictorial representations of relationships.

6 0

3 years ago

Read 2 more answers

What is the horizontal component of a ball thrown at a 27 degree angle at 16 m/s?

Airida [17]

Answer:

14.25 m/s

Explanation:

In this problem, we need to find the horizontal component of a ball thrown at a 27 degree angle at 16 m/s.

It can be given by :

$v_x=v\cos\theta\\\\=16\times \cos(27)\\\\=14.25\ m/s$

So, the horizontal component of the ball is 14.25 m/s.

6 0

2 years ago

A particle is projected with velocity v0 directly up a slope which makes an angle α with the horizontal. Assume frictionless mot

Nikolay [14]

Answer:

a)T total = 2*Voy/(g*sin( α ))

b)α = 0º , T total≅∞ (the particle, goes away horizontally indefinitely)

α = 90º, T total=2*Voy/g

Explanation:

Velocity in the Y axis:

Voy=Vo*sinα

Time to reach the maximal height :

Kinematics equation: Vfy=Voy-at

a=g*sinα ; g is gravity

if Vfy=0 ⇒ t=T ; time to reach the maximal height

so:

0=Voy-g*sin( α )*T

T=Voy/(g*sin( α ))

Time required to return to the starting point:

After the object reaches its maximum height, the object descends to the starting point, the time it descends is the same as the time it rises.

So T total= 2T = 2*Voy/(g*sin( α ))

α = 0º , sinα=0

The particle goes totally horizontal, goes away indefinitely

T total= 2*Voy/(g*sin( α )) ≅∞

α = 90º, sinα=1

T total=2*Voy/g

6 0

3 years ago

The work output of a machine divided by the work input is the ____ of the machine.

s344n2d4d5 [400]

The work output of a machine divided by the work input is the "Efficiency" of the machine.

Hope this helps!

7 0

3 years ago