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daser333 [38]
3 years ago
7

Because P and S waves travel faster through the Earth's mantle than through Earth's crust, scientists know that the mantle is __

_____ and _______ than the crust.
A- liquid; denser
B- liquid; less denser
C- solid; denser
D- solid; less denser
Physics
2 answers:
larisa [96]3 years ago
6 0
B. liquid and less denser
liberstina [14]3 years ago
6 0
It’s gonna be B Bc it less denser
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Determine the magnitude of the force F1F1 component acting along the uu axis. Express your answer to three significant figures a
dybincka [34]

The first image below shows force F1 and the axes.

Answer: (F_{1})_{u}= 3.62 kN

Explanation: The second figure below express the parallelogram method to calculate the u component of force F1.

The <u>Parallelogram</u> <u>Method</u> is a method to determine resultant force and is applied as described in the question above.

With the three components, F_{1},(F_{1})_{u} and (F_{1})_{v} and angles, it can be used the <u>Law</u> <u>of</u> <u>Sines</u>, which states:

\frac{a}{sin\alpha} =\frac{b}{sin\beta} =\frac{c}{sin\theta}

i.e., there is a relation of proportionality between an angle and its opposite side.

For the triangle below:

\frac{u}{sin30} =\frac{F_{1}}{sin105}

u=F_{1}\frac{sin(30)}{sin(105)}

u=7\frac{0.5}{0.966}

u = 3.62

The magnitude of the component acting along the u-axis is 3.62kN.

5 0
3 years ago
A 0.40 kg block can slide up and down a rough a 10-m-high, 30-m-long slope. At the bottom, a stiff spring with spring constant 8
Paul [167]

Answer:

v=11.135m/s

Explanation:

From the question we are told that

Mass m=0.40kg

Frictional friction f=1.2

Spring constant k=800N/m

Compressed x=0.50

Generally the energy balance equation is mathematically given as

1/2kx^2=f*30+m*g*sin \theta*30+1/2m*v^2

if (sin=10/30-1/3)

1/2(800)(0.5)^2=(1.2)*30+(0.4)*9.8*1/3*30+1/2(0.4)*v^2

100=36+39.2+0.20v^2

v^2=\frac{24.8}{0.20}

v=\sqrt{124}

v=11.135m/s

8 0
3 years ago
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