It's C, you're right.
Explanation:
A beta decay has the electron nuclei.
Answer:
physical change because the gaseous water is chemically the same as the liquid
Explanation:
Matter can be defined as anything that has mass and occupies space. Any physical object that is found on earth is typically composed of matter. Matter are known to be made up of atoms and as a result has the property of existing in states.
Generally, matter exists in three (3) distinct or classical phases and these are; solid, liquid and gas.
A physical change can be defined as a type of change that only affects the physical form of a chemical substance (matter) without having any effect on its chemical properties. Thus, a physical change would only affect the physical appearance and properties of a chemical substance (matter) but not its chemical properties.
This ultimately implies that, a physical change result in a change of matter from one form or phase (liquid, solid or gas) to another without a corresponding change in chemical composition.
Hence, the boiling of water is considered to be a physical change because the gaseous water is chemically the same as the liquid i.e there isn't any changes in chemical composition of water when boiling.
It should probably be chemical
Ozone is mainly found in two regions of the Earth's atmosphere. Most ozone (about 90%) resides in a layer that begins between 6 and 10 miles (10 and 17 kilometers) above the Earth's surface and extends up to about 30 miles (50 kilometers). This region of the atmosphere is called thestratosphere.
Answer:
(a) The time until overflow is 649 s
(b) The time until overflow is 355 s
Explanation:
The volume as a function of time can be expressed as
If the tank is initially half full, V(0) = V0 = 4/2 = 2 m3.
With ρ=1000 kg/m3, the volume flows are
Flow in = 6.33 kg/s * 0.001 m3/kg = 0.00633 m3/s
Flow out = 3.25 kg/s * 0.001 m3/kg = 0.00325 m3/s
The time until overflow (V(t)=4 m3) is
If the flows are
Flow in = 6.83 kg/s * 0.001 m3/kg = 0.00683 m3/s
Flow out = 3.50 kg/s * 0.001 m3/kg = 0.0035 m3/s
And the tank is initially 2/3 full (V(0)=2.67 m3)
The time until overflow is