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ArbitrLikvidat [17]
3 years ago
6

volcanoes can form along all of the following except a) transform boundaries b) hot spots c) convergent boundaries d) divergent

boundaries
Physics
2 answers:
Nikitich [7]3 years ago
7 0

Answer: Option (A)

Explanation: Volcanoes are formed when two plates collides with one another, and when the denser plate getting subducted below the lighter plate, the crust undergoes partial melting, as a result of which the magma forces towards the surface and thereby forms volcanoes. Also along the hotspot regions, volcanoes are formed because of the intruding magma.

But in case of transform plate boundary, the plates are neither destructed nor created. So, the plates remains conserved. Due to this, there occurs no partial melting of the crust and so no volcanoes.

Thus, the correct answer is option (A).

elena-14-01-66 [18.8K]3 years ago
4 0
A.) Transform Boundaries
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At 20°c, the resistance of a sample of nickel is 525 ohms. what is the resistance when the sample is heated to 70°C?​
Ipatiy [6.2K]

The resistance of the sample is 682.5\Omega

Explanation:

The relationship between resistance of a material and temperature is given by the equation

R(T)=R_0(1+\alpha (T-T_0))

where

R_0 is the resistance at the temperature T_0

\alpha is the temperature coefficient of resistance

For the sample of nickel in this problem, we have:

R_0 = 525 \Omega when the temperature is T_0 = 20^{\circ}C

While the temperature coefficient of resistance of nickel is

\alpha = 0.006/^{\circ}C

Therefore, the resistance of the sample when its temperature is

T=70^{\circ}C

is

R=(525)(1+0.006(70-20))=682.5 \Omega

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3 years ago
A flywheel with a diameter of 1.63 m is rotating at an angular speed of 79.9 rev/min. (a) What is the angular speed of the flywh
Studentka2010 [4]

Answer:

(a) 8.362 rad/sec

(b) 6.815 m/sec

(c) 9.446 rad/sec^2

(d) 396.22 revolution

Explanation:

We have given that diameter d = 1.63 m

So radius r=\frac{d}{2}=\frac{1.63}{2}=0.815m

Angular speed N = 79.9 rev/min

(a) We know that angular speed in radian per sec

\omega =\frac{2\pi N}{60}=\frac{2\times 3.14\times 79.9}{60}=8.362rad/sec

(b) We know that linear speed is given by

v=r\omega =0.815\times 8.362=6.815m/sec

(c) We have given final angular velocity \omega _f=675rev/min

And \omega _i=79.9rev/min

Time t = 63 sec

Angular acceleration is given by \alpha =\frac{\omega _f-\omega _i}{t}=\frac{675-79.9}{63}=9.446rad/sec^2

(d) Change in angle is given by

\Theta =\frac{1}{2}(\omega _i+\omega _f)t=\frac{1}{2}(675+79.9)\times 1.05=396.22rev

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PV = 400 x 0.08 = 32 J

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The correct answer is compound
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