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3 years ago

(06.01 LC)

Physics

2 answers:

solniwko [45]3 years ago

7 0

Answer: A

Explanation:

After a chemical change, the total number of atoms of each elements stays the same.

According to the law of conservation of matter "During a chemical reaction, matter is neither created nor destroyed".

This law provides us with a good view into what happens to atoms after a chemical change.

Simply, since we know that atoms are not created nor destroyed, that means their number cannot increase nor decrease.

The simply remain the same.

This is why every chemical equation must be balanced.

Alexandra [31]3 years ago

5 0

Answer:

It remains the same.

Explanation:

During physical change, the mass, number of atoms and number of molecules will remain the same.

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madam [21]

Hi there!

We can use the kinematic equation:

$v_f^2 = v_i^2 + 2ad$

vf = Final velocity (? m/s)

vi = initial velocity (0 m/s, dropped from rest)

a = acceleration (due to gravity, 9.8 m/s²)

d = distance (9.8 m)

Simplify the equation to solve for vf:

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2 years ago

What are (a) the charge and (b) the charge density on the surface of a conducting sphere of radius 0.20 m whose potential is 240

Lady bird [3.3K]

Answer:

(a) charge q=5.33 nC

(b) charge density σ=10.62 nC/m²

Explanation:

Given data

radius r=0.20 m

potential V=240 V

coulombs constant k=9×10⁹Nm²/C²

To find

(a) charge q

(b) charge density σ

Solution

For (a) charge q

$V_{potential}=kq/r\\ q=rV_{potential}/k\\q=\frac{(0.20)(240)}{9*10^{9} }\\ q=5.333*10^{-9}C\\or\\ q=5.33nC$

For (b) charge density

As charge density σ is given as:

σ=q/(4πR²)

σ=(5.333×10⁻⁹) / (4π×(0.20)²)

σ=10.62 nC/m²

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2 years ago

Helpon

statuscvo [17]

Answer:

huh ?ion understand

Explanation:

have a bad day <3

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2 years ago

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steposvetlana [31]

this question is unclear. please specify.

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3 years ago

a particle is moving in a circle of radius R with constant speed.The time period of particle is T=1 second.In a time t=T/6,if th

12345 [234]

at t=T/6, total distance covered= 2*pi*r/6 and displacement= r

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so, 2*pi*r/6- r =2(1/6)=1/3

r=1/(pi-3)=7.062

4 0

3 years ago

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