3 years ago

Which statement best explains what must take place for water to boil

1 answer:

3 0

For water to boil, you need a pot of water and a stove. You put the pot on the stove until the water bubbles, this is called boiling hope this helps lol (:

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Are you country or city

natta225 [31]

Answer:

<h3>I am country and my motherland is Nepal.</h3><h3>hope it helps you have a good day keep smiling be happy stay safe.</h3>

<h3 />

3 0

3 years ago

What is the density of an object with a mass of 120g and a volume of 7ml

mel-nik [20]

Density=mass divided by volume, so d=120g/7ml

3 0

3 years ago

A sound wave has a frequency of 645 Hz in air

rodikova [14]

Answer:

$-14.2^{\circ}C$

Explanation:

First of all, we can find the speed of the sound wave, which is given by:

$v=f \lambda$

where

f = 645 Hz is the frequency

$\lambda=0.5 m$ is the wavelength

Substituting,

$v=(645 Hz)(0.5 m)=322.5 m/s$

Now we can find the temperature of the air by using the following relationship:

$v = 331 m/s + 0.6 T$

where T is the temperature in Celsius degrees. Since we know v = 322.5 m/s, we can re-arrange the formula to find the temperature:

$T=\frac{v-331 m/s}{0.6}=\frac{322.5 m/s-331 m/s}{0.6}=-14.2^{\circ}C$

7 0

3 years ago

What factors do NOT affect friction between two objects? Explain how you know this.

Black_prince [1.1K]

The frictional force between two bodies depends mainly on three factors: (I) the adhesion between body surfaces

(ii) roughness of the surface

(iii) deformation of bodies.

4 0

2 years ago

The world record for a woman running a marathon is approximately 2.25 hours. If a marathon's distance is 26.2 miles (42164.81 me

netineya [11]

Answer:

11.6mph South East

Explanation:

Given parameters:

Time = 2.25hrs

Displacement = 26.2miles south east

Unknown:

Velocity = ?

Solution:

Velocity is the displacement divided by the time taken. It is a vector quantity with both magnitude and direction.

Now;

Velocity = $\frac{displacement}{time taken}$

Velocity = $\frac{26.2}{2.25}$ = 11.6mph South East

8 0

3 years ago

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