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3 years ago

What happens when two continental plates meet ?

Physics

2 answers:

dalvyx [7]3 years ago

8 0

Answer:

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Explanation:

trasher [3.6K]3 years ago

3 0

Answer:

option B is correct answer of this question

they will crash into each other and form mountains

hope it helps

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When switched on, the grinding machine accelerates from rest to its operating speed of 3550 rev/min in 10 seconds. When switched

Paraphin [41]

Answer:

During start total turns

$N_1 = 296 turn$

After half of the time total turns

$N_3 = \frac{29.6 + 0}{2}(5) = 74 turns$

Total number of turns during it stop

$N_2 = \frac{59.17 + 0}{2}(31) = 917 turn$

After half of the time total turns

$N_4 = 688 turns$

Explanation:

Initially the machine is at rest and then starts rotating with speed 3550 rev/min

now we will have

$f = \frac{3550}{60} = 59.17 rev/s$

now we know that it took 10 s to reach the speed

so angular acceleration is given as

$\alpha = \frac{\omega_f - \omega_i}{t}$

$\alpha = \frac{59.17- 0}{10} = 5.917 rev/s^2$

now it stops in 31 s so the angular deceleration is given as

$\alpha_2 = -\frac{59.17}{31} = -1.91 rev/s^2$

now initially number of turn to reach the given speed

$N_1 = \frac{59.17 + 0}{2}(10) = 296 turn$

number of turns during it stop

$N_2 = \frac{59.17 + 0}{2}(31) = 917 turn$

Now during startup speed after t = 5 s is given as

$\omega_1 = (5.917)(5) = 29.6 rev/s$

$N_3 = \frac{29.6 + 0}{2}(5) = 74 turns$

now during it stop the speed after half the time is given as

$\omega_2 = 59.17 - (1.91)(15.5) = 29.56 rev/s$

now the number of turns is given as

$N_4 = \frac{59.17 + 29.56}{2}(15.5)$

$N_4 = 688 turns$

5 0

3 years ago

A 30 N block is being pulled along a horizontal surface with an acceleration of 6 m/s2 by a rope. The coefficient of kinetic fri

nata0808 [166]

Answer:

33N

Explanation:

Download pdf

6 0

4 years ago

A cannon is rigidly attached to a carriage, which can move along horizontal rails but is connected to a post by a large spring,

Mademuasel [1]

Answer:

Explanation:

Given

mass of cannon and cart is $m_1=6475.91 kg$

Spring constant $k=20000 N/m$

mass of Projectile $m_2=234 kg$

Launch Velocity of cannon $v_2=170 m/s$

Launch angle $\theta =31.3^{\circ}$

As the External Force is zero therefore we can conserve momentum

Initially both Projectile and cannon is at rest

Conserving momentum in horizontal direction

$m_1u_1+m_2u_2=m_1v_1+m_2v_2\cos 31.3$

$0+0=6475.91\times v_1+234\times 170\cdot \cos (31.3)$

$v_1=-\frac{234\times 170\cdot \cos (31.3)}{6475.91}$

$v_1=-5.24 m/s$

i.e. cannon is moving in opposite direction of Projectile

6 0

4 years ago

explain why astronauts around the earth either in spaceship, a space station, or on a spacewalk appear to be weightless but are

IrinaK [193]

Answer:

Zero gravity

Explanation:

Astronauts around the earth either in spaceship, a space station or on a space walk appear to be weightless because of the zero gravity in such environment.

Weight is a function of the mass and acceleration due to gravity a body has.

Weight = mass x acceleration due to gravity

In a place where acceleration due to gravity is 0, the weight would be zero and a person would appear to be weightless.

6 0

3 years ago

Convert 1215 m to km.<br> Answer:

IgorC [24]

Answer:

it is 12.15 km

Explanation:

1215 km ÷1000

=12.15

please mark as brainliest

8 0

3 years ago