How many neutrons are in an atom of copper? round your answer to the nearest whole number.

Explanation:

Atomic number of copper is 29 and it sis known that atomic number is the sum of total number of protons present in `an atom.

Whereas atomic mass is the sum of total number of protons and neutrons present in an atom.

As atomic mass of copper is 64. Hence, calculate the number of neutrons present in a copper atom as follows.

              Atomic mass = no. of protons + no. of neutrons

                       64 = 29 + no. of neutrons

                  no. of neutrons = 64 - 29

                                             = 35

Therefore, we can conclude that in an atom of copper there are 35 neutrons.

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27