1 year ago

Which type of rock can only form below earths surface?

Physics

2 answers:

Inessa [10]1 year ago

7 0

Answer: Igneous it forms because of magma but magma is under the earths surface so its Igneous

Explanation:

Degger [83]1 year ago

7 0

Answer:

its metamorphic.

Explanation:

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Three identical train cars, coupled together, are rolling east at speed v0. A fourth car traveling east at 2v0 catches up with t

Bezzdna [24]

Answer:

$1v_0$

Explanation:

Assuming that cars 4 and 5 have same mass so that the momentum

P=mv where m is mass and v is velocity hence

Momentum=0+2mv+3mv=5mv

The final mass is 2m+3m=5m

From aw of conservation of momentum

$5mv_0=5mv$ hence $v=1v_o$

Therefore, the speed is $1v_0$

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3 years ago

What is the intensity in W/m2 of a laser beam used to burn away cancerous tissue that, when 85.0% absorbed, puts 470 J of energy

Advocard [28]

Answer:

26036485.6433 W/m²

Explanation:

E= Energy = 470 J

t = Time = 4 seconds

d = Diameter = 2.6 mm

Power is given by

$P=\dfrac{E}{t}$

Intensity is given by

$I=\dfrac{P}{\pi r^2}\\\Rightarrow 0.85I=\dfrac{E}{t\dfrac{\pi}{4} d^2}\\\Rightarrow I=\dfrac{470}{0.85\times 4\times \dfrac{\pi}{4}\times (2.6\times 10^{-3})^2}\\\Rightarrow I=26036485.6433\ W/m^2$

The intensity of the laser beam is 26036485.6433 W/m²

8 0

3 years ago

Who were we in the space/arms race with?<br> In the movie *Hidden figures*

daser333 [38]

Explanation:

The U.S. launched its first man into space in May 1961.

4 0

3 years ago

Please help with both questions thank you!

Katen [24]

I think is:

(4)Inner core

(4)different Kingdome different species

hope this help :)

3 0

2 years ago

What is the average acceleration of a car that starts from

MAXImum [283]

Answer:

1.5m/s^2

Explanation:

In the picture above.

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3 years ago

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