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2 years ago

11

What is a measurement of the earths history divided into time periods?

2 answers:

dimulka [17.4K]2 years ago

8 0

Geologic Time Scale is the answer

Pie2 years ago

3 0

<span>Fossil Record</span>

<span>Geologic Time Scale</span>

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The vehicles are fitted with shockers why

MissTica

Shockers acts as a shock absorber in the vehicle making the ride comfortable. When vehicle goes on rough road then it gets shocks from the road deformities the springs present in the shockers provide counter force and thus making the vehicle stable ride without shock.

[I copied this from the internet, but hope it helps!]

7 0

2 years ago

A ball of radius r rolls on the inside of a track of radius R. If the ball starts from rest at the vertical edge of the track, f

meriva

Answer:

$v=\sqrt{\dfrac{10g(R-r)}{7}}$

Explanation:

Given that

Radius of track = R

Radius of ball = r

The ball can be treated as solid sphere, so

The moment of inertia of ball

$I=\dfrac{2}{5}mr^2$

When the ball reach at the lowest position then it will have both angular and linear speed.

Condition for rolling without slipping v= ωr

Form energy conservation

$mgR=mgr+\dfrac{1}{2}mv^2+\dfrac{1}{2}I\omega^2$

v= ωr

$I=\dfrac{2}{5}mr^2$

$mgR=mgr+\dfrac{1}{2}mv^2+\dfrac{1}{2}\times \dfrac{2}{5}mr^2\omega^2$

$mg(R-r)=\dfrac{1}{2}mv^2+\dfrac{1}{2}\times \dfrac{2}{5}mv^2$

$2mg(R-r)=mv^2+\dfrac{2}{5}mv^2$

$2g(R-r)=\dfrac{7}{5}v^2$

$v=\sqrt{\dfrac{10g(R-r)}{7}}$

3 0

3 years ago

Check b and c plz :DD

Inga [223]

Both of your answers are correct

4 0

2 years ago

Read 2 more answers

A glass is half-full of water, with a layer of vegetable oil (n = 1.47) floating on top. A ray of light traveling downward throu

Shtirlitz [24]

Answer:

critical angle = 64.79°

ray will not penetrate into the water

Explanation:

given details

refractive index of oil n1 = 1.47

refractive index of water n2= 1.33

incident angle = 71.4 °

$\theta_c = sin^{-1}(\frac{n2}{n1})$

= sin^{-1}(\frac{1.33}{1.47}

critical angle = 64.79°

incident angle > critical angle = reflection

incident angle < critical angle = refraction

In this case, 71.4 > 64.79 therefore it will undergo total internal reflection

therefore ray will not penetrate into the water

7 0

3 years ago

Two tuning forks A and B when sounded together produce 5 beats per second. The tuning fork A has frequency 480Hz. The fork B is

BartSMP [9]

<h2>The frequency of tuning fork B is 475 Hz</h2>

Explanation:

The number of beats produced is equal to the frequency difference between the two tuning forks .

The frequency of A = 480 Hz

Thus the frequency of B can be = 485 or 475 Hz

When B is filed , its frequency increases and it start producing 2 beats with A .

Thus it frequency must be 475 Hz , by filing , it increases to 478 Hz .

By which it gives 480 - 478 = 2 beats per second .

This cannot happen with frequency 485 , because by filing this difference increases in place of decreasing .

5 0

3 years ago