When electrons are lost, a ______ ion is formed. When electrons are gained, a __________ ion is formed.
2 answers:
Answer:
When electrons are lost, a positively charged ion is formed. When electrons are gained, a negatively charged ion is formed.
Explanation:
Atoms consist of three particles:
- Protons, positively charged, in the nucleus
- Neutrons, no charge, in the nucleus
- Electrons, negatively charged, orbiting around the nucleus
The proton and the electron have same magnitude of charge (), but the proton's charge is positive while the electron's charge is negative.
For a neutral atom, the number of protons is equal to the number of electrons, so the atom is electrically neutral. However, sometimes the atom can lose or gain electrons, becoming electrically charged: this is called ion. In particular:
- If the atom loses one (or more) electrons, it will remain with an excess of positive charge (because the number of protons is now greater than the number of electrons), so it will form a positively charged ion
- if the atom gains one (or more) electrons, it will remain with an excess of negative charge (because the number of protons is now smaller than the number of electrons), so it will form a negatively charged ion
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Answer:
Explanation:
It is given that,
Mass of bundle of shingles, m = 10 kg
Upward acceleration of the shingles,
The radius of the motor of the pulley, r = 0.17 m
Let T is the tension acting on the shingles when it is lifted up. It can be calculated as :
T = 113 N
Let is the minimum torque that the motor must be able to provide. It is given by :
So, the minimum value of torque is 19.21 N-m. Hence, this is the required solution.