An individual is nearsighted; his near point is 13.0 cm and his far point is 50.4 cm. what lens power is needed to correct his n
1 answer:
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Proton: Its electrical charge is +1, its mass is 1, it's found in the nucleus
Neutron: Its electrical charge is 0, its mass is 1, it's found in the nucleus
Electron: Its electrical charge is -1, its mass is negligible, it's found outside the nucleus
Explanation:
Atoms consist of three types of particles:
- Proton: the proton is found in the nucleus of the atom, and it has a positive electric charge, equal to
(expressed in units of fundamental charge, it has a charge of +1). Its mass is
, while its mass expressed in atomic mass units is 1 a.m.u
- Neutron: the neutron is also found in the nucleus of the atom, and it has no electric charge. Its mass is similar to the mass of the proton (slightly larger), and neutrons and protons are held together in the nucleus by the presence of the strong nuclear force
- Electron: the electron orbits around the nucleus, far away from it. It has negative electric charge, opposite to that of the proton (
, or -1 in units of fundamental charge). Its mass is much lower than that of the proton, approximately 1800 times smaller, so it can be considered as negligible.
Learn more about atoms:
#LearnwithBrainly
Answer:
Explanation:
Given
mass of ethanol
mass of aluminium cup
both are at an initial temperature of
specific heat of ethanol
specific heat of aluminium
specific heat of ice
specific heat of water
Latent heat of fusion
suppose m is the mass of ice added
Heat loss by Al cup and ethanol after is reached
Heat gained by ice such that ice is melted and reached a temperature of
Comparing 1 and 2 we get
Thus 23.65 gm of ice is added