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a uniform resistance wire is stretched till its length becomes 4 times what happens to the resistance

Rzqust [24]

The answer is in the box

Step by step

Yegehgehd

3 0

3 years ago

An electrical motor spins at a constant 2695.0 rpm. If the armature radius is 7.165 cm, what is the acceleration of the edge of

djyliett [7]

Answer:

Acceleration will be $5706.77rad/sec^2$

So option (D) will be correct answer

Explanation:

We have given angular speed of the electrical motor $\omega =2695rpm$

We have to change this angular speed in rad/sec for further calculation

So $\omega =2695rpm=2695\times \frac{2\pi }{60}=282.2197rad/sec$

Armature radius is given r = 7.165 cm = 0.07165 m

We have to find the acceleration of edge of motor

Acceleration is given by $a=\omega ^2r=282.2197^2\times 0.07165=5706.77rad/sec^2$

So acceleration will be $5706.77rad/sec^2$

So option (D) will be correct answer

5 0

4 years ago

The largest of the terrestrial planets is _____.

vladimir1956 [14]

The terrestrial planets are those that are similar to Earth. In Laint terra means Earth and Earth is Tierra.

The terrestrial planets have solid surface made up of rocks and metals.

There are four terrestrial planet in our planetary (solar) system: Mercury, Venus, Earth and Mars.

You can verify the sizes of those planets in many places.

Earth is the largest of the terrestrial planets.

3 0

3 years ago

Read 2 more answers

A 51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. What is her speed?

arlik [135]

Kinetic energy of woman is given as

$KE = 9.96 \times 10^4 J$

mass of woman is given as

$m = 51 kg$

now we will have

$KE = \frac{1}{2}mv^2$

$9.96 \times 10^4 J = \frac{1}{2}(51) v^2$

$v^2 = \frac{9.96 \times 10^4}{25.5}$

$v^2 = 3.91 \times 10^3$

$v = 62.5 m/s$

8 0

4 years ago

Which of the following describes the oscillation of the medium in transverse waves?

svp [43]

Wave An oscillation that transfers energy and momentum.

Mechanical wave A disturbance of matter that travels along a medium. Examples include waves on a string, sound, and water waves.

Wave speed Speed at which the wave disturbance moves. Depends only on the properties of the medium. Also called the propagation speed.

Transverse wave Oscillations where particles are displaced perpendicular to the wave direction.

Longitudinal wave Oscillations where particles are displaced parallel to the wave direction.

In a transverse wave, perpendicular to the direction the wave travels, the particles are displaced. Examples of transverse waves include on a string vibrations and on the water surface ripples. By moving the slinky up and down vertically, we can create a horizontal transverse wave.

In a longitudinal wave, parallel to the direction the wave travels, the particles are displaced. Compressions that move along a slinky are an example of longitudinal waves. By pushing and pulling the slinky horizontally, we can make a horizontal longitudinal wave.

Common mistakes and misconceptions

Sometimes people forget that wave velocity is not the same as the velocity of the medium particles. How fast the disturbance travels through a medium is the wave speed. The velocity of the particle is how fast a particle moves about its position of equilibrium.

6 0

3 years ago