ANSWER:
_________
B and C ( an object stays at rest) and ( an object is moved in the same direction as the force is acting in it)
EXPLANTION:
____________
A is INCORRECT because when an object is being lifted work is being down because if gravity
B is CORRECT because the object is not doing anything
C is CORRECT because it’s not doing the work since the force is pushing the same way as the object is moving
D is INCORRECT because it’s doing work because the force and the object is pushing against each other like this -> <-
FUN FACT:
_________
A cow-bison hybrid is called a “beefalo
I hoped this helped! And have a •AMAZING• day :3
When sulphur burns it turns to sulphur dioxide
An electron in the Bohr model of hydrogen revolves around the nucleus to possess energy.
Answer: Option B
<u>Explanation:</u>
According to Rutherford, it was stated that electrons are the subatomic particles which revolve around the nucleus. But the error of spiral collapse of these electrons is due to absence of electrons in discrete levels. Hence, in Bohr atom model, the atom's negative or electrons are said to rotate in respective energy levels.
So, they keep on revolving around a nucleus in Bohr atom is said to revolve around a nucleus in order to possess energy. Thus, each level will exhibit discrete energy levels which will contain electrons of specific energy only.
Answer:
Power output: W=1426.9MW
Explanation:
The power output of the falls is given mainly by its change in potential energy:
The potential energy for any point can be calculated as:
If we consider the base of the falls to be the reference height, at point 2 h=0, so P2=0, and height at point 1 equals 52m:
If we replace m with the mass rate M we obtain the rate of change in potential energy over time, so the power generated: