If gravity is the ONLY force acting on an object, then the force of
Earth's gravity produces acceleration of 9.8 meters per second²
downward. That number doesn't change, and it doesn't depend
on the mass or weight of the object.
If there are any other forces acting on the object at the same time,
like air resistance or some other kind of friction for example, then
all bets are off, and we can't say what the object's acceleration will
be in that case.
The fraction of Oil will be 0.8and block will be 0.95
What is density?
Density is the ratio of Mass of a compound upon Volume of that compound. It's SI unit can be g/cm³, kg/m³.
As we know the Density of water is 997Kg/m³≈1000Kg /m³.
1) Fraction of Oil is
800/1000=0.8
2) Fraction of Block is
950/1000= 0.95.
to learn more about Density click brainly.com/question/1354972
Answer :the resultant of two vectors can be found using either the parallelogram method or the triangle method. don't know if this was helpful ?
Explanation:
Answer: 1. B. The number of electrons emitted from the metal per second increases.
2. The maximum speed of the emitted electrons increases.
The stopping potential increases
Explanation:
Photoelectric effect is simply referred to as the emission of electrons that occurs when there's an electromagnetic radiation. An example of such electromagnetic radiation is when material is being hit by light.
Assuming that the light incident on the metal surface causes electrons to be ejected from the metal, the number of electrons emitted from the metal per second increases if the intensity of the incident light is increased.
Also, if the initial light incident on the metal surface causes electrons to be ejected from the metal, the maximum speed of the emitted electrons increases and the stopping potential increases.
Answer:
The combinations are
1.
C , ![15\times 10^{-4}](https://tex.z-dn.net/?f=15%5Ctimes%2010%5E%7B-4%7D)
2.
C , ![10\times 10^{-4}](https://tex.z-dn.net/?f=10%5Ctimes%2010%5E%7B-4%7D)
Explanation:
The force between two charges q and Q is given by Coulomb's law.
The coulomb force is given by
![F = \frac{1}{4\prod \varepsilon _{0}}\times \frac{Q\times q}{r^{2}}](https://tex.z-dn.net/?f=F%20%3D%20%5Cfrac%7B1%7D%7B4%5Cprod%20%5Cvarepsilon%20_%7B0%7D%7D%5Ctimes%20%5Cfrac%7BQ%5Ctimes%20q%7D%7Br%5E%7B2%7D%7D)
Where, r be the distance between two charges
According to the question,
r = 15 cm, Q =
C, q =
C , F = 12 N
Force remains same, distance remains same
so the product of Q and q be same
The product of Q and q is ![30\times 10^{-8}](https://tex.z-dn.net/?f=30%5Ctimes%2010%5E%7B-8%7D)
So other combination of charges are
1.
C , ![15\times 10^{-4}](https://tex.z-dn.net/?f=15%5Ctimes%2010%5E%7B-4%7D)
2.
C , ![10\times 10^{-4}](https://tex.z-dn.net/?f=10%5Ctimes%2010%5E%7B-4%7D)