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4 years ago

What type of plate boundary interactions takes place when tectonic plates move apart?

1 answer:

8 0

Tectonic plates interactions are of three different basic types: Divergent boundaries are areas where plates move away from each other, forming either mid-oceanic ridges or rift valleys. <span />

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A scaffold of mass 77 kg and length 5.0 m is supported in a horizontal position by a vertical cable at each end. A window washer

Lynna [10]

Answer:

A) T2 = 912.88 N

B) T1 = 607.12 N

Explanation:

First of all, we see that the sum of the tensions is equal to the total weight.

Now, for the scaffold, weight; W_s = 77 x 9.8 = 755.6 N

For the window washer, Weight; W_w = 78 x 9.8 = 764.4 N

Total weight;W_t = W_s + W_w

W_t = 755.6 N + 764.4 N = 1520 N

Thus,

T1 + T2 = 1520

Where T1 and T2 are the tensions in farther and nearer cables respectively.

Now, we need to do a torque problem.

The window washer is 1.8m from the right end of the scaffold and so the weight of the scaffold is at its center. This is 2.5 m from either end. Let the pivot point be at right end of the scaffold.

For the window washer, counter clockwise torque = 764.4 x 1.5 = 1146.6 N.m

For the scaffold, counter clockwise torque = 755.6 x 2.5 = 1889 N.m

Total Torque; T = 1146.6 + 1889 = 3035.6 N.m

For the cable at the left end of the cable, clockwise torque = T1 x 5

Set this equal to the total counter clockwise torque and solve for T1.

Thus,

T1 x 5 = 3035.6

T1 = 3035.6 ÷ 5 = 607.12 N

T2 = 1520 – 607.12 = 912.88 N

6 0

4 years ago

What's an adjective to describe Isaac Newton?

Mandarinka [93]

Advanced
smart
genius
intelligent
innovative

8 0

3 years ago

The direction of the magnetic field produced by an electric current will change when the direction of the ______changes.

Vinvika [58]

Answer: Electric current

Explanation: The direction of the magnetic field produced by an electric current will change when the direction of the electric current changes.

5 0

3 years ago

Read 2 more answers

Which of the following would occur when the number of coils is increased

Andrew [12]

Voltage is increased, i think.

6 0

4 years ago

A police car is driving north with a siren making a frequency of 1038 hz. Moops is driving north behind the police car at 12 m/s

Marianna [84]

Answer:

The police car is moving at 41.24 m/s.

Explanation:

To find the speed of the police car we need to use the Doppler equation:

$f = f_{0}(\frac{v + v_{r}}{v + v_{s}})$

Where:

v: is the speed of the sound = 343 m/s

$v_{r}$ : is the speed of the receiver = 12 m/s

$v_{s}$ : is the speed of the source =?

f: is the observed frequency = 959 Hz

f₀: is the emitted frequency = 1038 Hz

Both terms are positive in the fraction because the velocity of the sound is in the opposite direction to both velocities of the police car and the other car.

By solving the above equation for $v_{s}$ we have:

$v_{s} = \frac{f_{0}(v + v_{r})}{f} - v = \frac{1038(343 + 12)}{959} - 343 = 41.24 m/s$

Therefore, the police car is moving at 41.24 m/s.

I hope it helps you!

8 0

3 years ago