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3 years ago

A graphical representation of the strength of an acid or base.

Physics

1 answer:

guapka [62]3 years ago

7 0

Answer:

pH Scale

Explanation:

I attached a picture of the pH scale too if you needed that as well.

Hope this helped! :)

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A potter's wheel is rotating around a vertical axis through its center at a frequency of 2.0 rev/s. The wheel can be considered

mart [117]

Answer:

$\omega_f=12.2954 \,rad.s^{-1}$ i.e.

$Frequency=1.9569\,rev.s^{-1}$

Explanation:

Given:

angular speed, $\omega_i =2\times 2\pi \,rad.s^{-1}$

mass of the disk, $M=4.9\,kg$

radius of the disk, $R=0.2\,m$

mass of the chunk, $m=2.7\,kg$

radius of the chunk, $r=0.04\,m$

We know that the angular momentum is given by:

$L=I.\omega$

and moment of inertia for a disc:

$I=\frac{1}{2} m.r^2$

According to the conservation of angular momentum, the final angular momentum is equal to the initial angular momentum.

$\frac{1}{2} \times M.R^2\times \omega= \frac{1}{2} \times (M.R^2+m.r^2) \omega_f$

$4.9\times 0.2^2\times (2\times 2\pi)=(4.9\times 0.2^2+2.7\times 0.04^2 )\tiems \omega_f$

$\omega_f=12.2954 \,rad.s^{-1}$

$Frequency=1.9569\,rev.s^{-1}$

4 0

4 years ago

Electric energy is generated at a nuclear power plant using which type<br> of nuclear reaction

aalyn [17]

Instead, they use<span> uranium fuel, consisting of solid ceramic pellets, to produce</span>electricity<span> through a process called fission. </span>Nuclear power plants<span> obtain the heat needed to produce steam through a physical process. This process, called fission, entails the splitting of atoms of uranium in a </span>nuclear reactor<span>.</span>

6 0

4 years ago

Read 2 more answers

Calculate the acceleration of a bus whose speed changes from 7 m/s to 16 m/s over a period of 5 s.

Bezzdna [24]

Let’s do this together!

Okay so the acceleration formula is vf-vi over time .

So the initial velocity (vi) 7m/s final velocity (vf) is 16m/s so we’re going to subtract 16-7 which is 9
M/s

So the time is 5s so 9m/s divided into 5s is 1.8m/s/2

So the answer is 1.8m\s2

7 0

4 years ago

A plane has a speed of 275 km/hr. The wind is at a 70 degree angle to the direction of the plane with a speed of 75 km/hr. What

8090 [49]

The combined speed of the plane and the wind is 249.35 km/h.

<h3>Relative speed</h3>

The relative speed of the plane due to speed of the wind is calculated as follows;

Let the direction of the plane be horizontal direction.

<h3>Speed of the wind</h3>

The speed of the wind is calculated as follows;

$V_b = V \times cos\theta\\\\V_b = 75 \times cos(70)\\\\V_b = 25.65 \ km/hr$

<h3>Combined speed</h3>

The combined speed of the plane and the wind is calculated as follows;

V = 275 km/h - 25.65 km/h

V = 249.35 km/h

Thus, the combined speed of the plane and the wind is 249.35 km/h.

Learn more about relative speed here: brainly.com/question/17228388

6 0

2 years ago

The volume of a ball was measured at 500.0 cm3, and its mass was measured to be 404.2 g.

KonstantinChe [14]

Answer:

0.8084g/cm³

Explanation:

For calculating density, mass is divided by volume.

Its units is commonly in grams per cubic centimeters.

Therefore,

density= mass/volume

= 404.2/500

=0.8084g/cm³

4 0

3 years ago

Read 2 more answers