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2 years ago

What variable(s) determine the amount of kinetic energy an object has?

Chemistry

2 answers:

pashok25 [27]2 years ago

8 0

Answer:

Explanation:

Khud karo answer hamsai kyun poch rahai hon

egoroff_w [7]2 years ago

7 0

Mass and velocity because the formula for kinetic energy is 1/2mv^2

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Which of the following has no electrical charge?

Shtirlitz [24]

Answer:

neutron

Explanation

neutrons have no net charge

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3 years ago

Which of the following statements explains why atoms are always neutral in charge

alex41 [277]

Answer see because there is a lack of potassium peanuts and walnuts also help the gravitational pull moons rocks different one but because of this energy conversion is the after effect of the camera being shot

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2 years ago

Which of the following elements could replace copper in a single replacement reaction?

Likurg_2 [28]

I’m thinking it’s gold because lead isn’t with cooper meaning that if u switch lead with cooper it won’t work at all .

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3 years ago

The half-life of a radioactive isotope is the amount of time it takes for a quantity of that isotope to decay to one half of its

Sedaia [141]

Radio active decay reactions follow first order rate kinetics.

a) The half life and decay constant for radio active decay reactions are related by the equation:

$t_{\frac{1}{2}} =$ $\frac{ln 2}{k}$

$t_{\frac{1}{2}} = \frac{0.693}{k}$

Where k is the decay constant

b) Finding out the decay constant for the decay of C-14 isotope:

$Decay constant (k) = \frac{0.693}{t_{\frac{1}{2}}}$

$k = \frac{0.693}{5230 years}$

$k = 1.325 * 10^{-4} yr^{-1}$

c) Finding the age of the sample :

35 % of the radiocarbon is present currently.

The first order rate equation is,

$[A] = [A_{0}]e^{-kt}$

$\frac{[A]}{[A_{0}]} = e^{-kt}$

$\frac{35}{100} = e^{-(1.325 *10^{-4})t}$

$ln(0.35) = -(1.325 *10^{-4})(t)$

t = 7923 years

Therefore, age of the sample is 7923 years.

3 0

3 years ago

The specific heat of a given substance

Lelechka [254]

The specific heat is the amount of heat per unit mass required to raise the temperature to 1 degree Celsius. (This is from google)

7 0

3 years ago