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3 years ago

Milk is a very weak acid. What might its pH value be ?

Physics

1 answer:

givi [52]3 years ago

5 0

Answer:

pH value is between 6.5 and 6.8

Explanation:

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HELP ASAP<br> WHAT ARE PROPERTIES OF WATER

iren [92.7K]

Pls mark as brainiest!!

3 0

3 years ago

What is phyical quantity

puteri [66]

Answer:

physical quantity

Explanation:

All quantity in term of which laws of physics are described and can be measured is called physical quantity

8 0

3 years ago

A parallel-plate capacitor has plates of area A. The plates are initially separated by a distance d, but this distance can be va

ohaa [14]

Answer:

d' = d /2

Explanation:

Given that

Distance = d

Voltage =V

We know that energy in capacitor given as

$U=\dfrac{1}{2}CV^2$

$C=\dfrac{\varepsilon _oA}{d}$

$U=\dfrac{1}{2}\times \dfrac{\varepsilon _oA}{d}\times V^2$

If energy become double U' = 2 U then d'

$U'=\dfrac{1}{2}\times \dfrac{\varepsilon _oA}{d'}\times V^2$

$2U=\dfrac{1}{2}\times \dfrac{\varepsilon _oA}{d'}\times V^2$

$2\times \dfrac{1}{2}\times \dfrac{\varepsilon _oA}{d}\times V^2=\dfrac{1}{2}\times \dfrac{\varepsilon _oA}{d'}\times V^2$

2 d ' = d

d' = d /2

So the distance between plates will be half on initial distance.

7 0

3 years ago

What is the answer? please

Nitella [24]

I think it`s D but iam not so sure

7 0

3 years ago

Read 2 more answers

If a wave vibrates up and down twice each second and travels a distance of 20 m each second and travels a distance of 20 m each

ivolga24 [154]

Answer:

Frequency is 0.5 Hz and the wave speed is 10 m/s.

Explanation:

As we know that frequency is defined as the how many times the no of cycles repeat in one second so if the wave is vibrating up and down twice during 1 second then the frequency in 1 second is

$f=\frac{1}{2} hz\\F=0.5hz$

Therefore frequency is 0.5 Hz.

Now the distance of wawe in each second is,

$d=20m$

Now the wave velocity is,

$v=fd$

Here, f is frequency, d is the distance, v is the wave velocity.

Substitute all the variables

$v=0.5\times 20\\v=10m/s$

Therefore the wave speed is 10 m/s.

6 0

3 years ago