Answer:
Explanation:
mas of proton = 1.673 x 10^-27 kg
mass of neutron = 1.675 x 10^-27 kg
mass of electron = 9.1 x 10^-31 kg
(a) the mass of proton and the mass of neutron is not exactly same.
(b) mass of proton = 1838.46 x mass of electron
mass of neutron = 1840.65 x mass of electron
(c) As proton and neutrons are more massive than the electrons, so the protons and the neutrons has the greatest contribution of mass of an atom.
(d) The greatest contribution to the chemical properties of an atom is due to the electrons.
Ordinary cells can convert chemical energy to electrical energy only, but rechargeable cells can also store electrical energy into chemical energy and vice versa. You will study more about it in your higher classes. secondary cells can be recharged and used again but dry cells cannot be recharged.
185 newtons because (W=Fd so W/d=F)296/1.6=185
Answer:
Explanation:
We should first find the velocity and acceleration functions. The velocity function is the derivative of the position function with respect to time, and the acceleration function is the derivative of the velocity function with respect to time.
Similarly,
Now, the angle between velocity and acceleration vectors can be found.
The angle between any two vectors can be found by scalar product of them:
So,
At time t = 0, this equation becomes
