Beta decay is exclusively the emission of electrons ... or its
oppositely charged relative, the positron ... from an atomic
nucleus.
Beta-minus is the emission of an electron, with a negative charge.
The change in the mass of the nucleus, if any, is minuscule.
The mass number of a nucleus is the sum of its protons and
neutrons, and the mass of an emitted electron is something
like 0.0005 the mass of one of those.
Answer:
A vector is a quantity that has both magnitude and direction .
I don't think it has a unity
Answer: Option A; 9.8 m/s^2
Explanation:
When an object is in the air, and there is no air resistance acting on the object, the only force that will act on the object is the gravitational force (on the vertical axis).
Then, if the only force acting on the object is the gravitational force, the acceleration of the object will be equal to the gravitational acceleration.
We know that the gravitational acceleration is equal to:
g = 9.8m/s^2
Then the acceleration on the vertical axis will be equal to:
a(t) = 9.8m/s^2
The correct option is the first one:
A. 9.8 m/s^2
Heat always transfers from substances with high thermal energy to substances with low thermal until both substances reach the maximum temperature
<span>rusting takes a long time, and rusting is a chemical change</span>
