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4 years ago

6

An atom has 29 protons, 29 electrons, and 35 neutrons. What is the mass number of the atom?

2 answers:

BartSMP [9]4 years ago

8 0

The mass number is 64

Ilya [14]4 years ago

5 0

The mass number will be 64 as to calculate the mass you add up the protons and neutrons.

Hope this helps!

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A copper wire of diameter 0.80 mm fails at an engineering stress = 248.2 MPa. Its ductility is measured as 75% reduction of area

Anvisha [2.4K]

Answer:

true stress = 992.8 MPA

true strain = 1.386

Explanation:

see the attached file

4 0

3 years ago

The volume of gas decreases at constant temperature to 80% of the inital value. How does the pressure value change relative to t

Westkost [7]

Answer:

The pressure value changes 400 % relative to the initial value.

Explanation:

Let suppose that the gas behaves ideally and represents a closed system, that is, a system with no mass interactions so that number of moles is conserved ( $n$ ). Since the variables involved in the isothermal process are pressure ( $P$ ) and volume ( $V$ ). Finally, the process is represented by the following relationship:

$P_{1}\cdot V_{1} = P_{2}\cdot V_{2}$ (1)

Where:

$P_{1}, P_{2}$ - Initial and final pressures.

$V_{1}, V_{2}$ - Initial and final volumes.

If we know that $P_{1} = P_{o}$ , $V_{1} = V_{o}$ and $V_{2} = 0.2\cdot V_{o}$ , then the final pressure of the closed system is:

$P_{2} = P_{1}\cdot \left(\frac{V_{1}}{V_{2}} \right)$

$P_{2} = 5\cdot P_{o}$

The pressure value changes 400 % relative to the initial value.

8 0

3 years ago

cycling at 13.0 m/s on your new aero carbon fiber bike, how much times would it take a pro cyclist to ride in 120 km? Give your

sp2606 [1]

We have that the time in seconds, minutes, and hours is

$t=1.083*10^{-4}s$

$T_{min}=1.805*10^{-6}min$

$T_{hours}=3.0083*10^{-8}hours$

From the Question we are told that

Velocity $v=13.0m/s$

Distance $d=120 km$

Generally the equation for the Time is mathematically given as

$t=\frac{13}{120*10^3}\\\\t=1.083*10^{-4}s$

Therefore

$T_{min}=1.083*10^{-4}s/60$

$T_{min}=1.805*10^{-6}min$

And

$T_{hours}=T_{min}/60$

$T_{hours}=3.0083*10^{-8}hours$

For more information on this visit

brainly.com/question/12319416?referrer=searchResults

4 0

3 years ago

Need help with number 5 ASAP please

topjm [15]

Explanation:

The current flow of electrons for all of the light bulbs would be interrupted. It is similar or 'breaking' a circuit.

5 0

3 years ago

If the volume of one drop is 0.031 mL according to Stu Dent’s measurement, approximately what volume would 22 drops be? Answer w

olasank [31]

Answer:

Volume of 22 drop will be 0.68 ml

Explanation:

We have given volume of one drop = 0.031 ml

We know that 1 liter = 1000 ml

So $1ml=10^{-3}L$

So 0.031 ml will be equal to $0.031\times 10^{-3}L$

We have to find the volume of 22 drop

For finding volume of 22 drop we have to multiply volume of one drop by 22

So volume of 22 drop will be $=22\times 0.031\times 10^{-3}=0.682\times 10^{-3}L=0.68mL$

So volume of 22 drop will be 0.68 ml

7 0

4 years ago