Answer:
Explanation:
The electronic configuration of many ions is that if a closes noble gas to them in a periodic table.
An Anion is a ion that has gained one or more electron, acquiring a negative charge.
A Cation is a ion that has lost one or more electron, gaining a positive charge.
Answer:
Image distance of the bug is - 0.4 m
Magnification is 5 times
Image is real and inverted
Solution:
As per the question:
The focal length of the lens, f = 0.1 m
Distance of the bud from the lens, v = 0.08 m
Now,
Using the lens maker formula:
where
v' = distance of the bug's image from the lens
Now,
v' = - 0.4 m
Now,
Magnification of the bug's image is given by:
m = 
m = 
Since, negative sign shows that inverted image is formed and positive value of magnification shows that real image is formed.
At higher temperature the body is heated, the temperature approaches the melting point and the body melts at the melting point
Answer:
C. Decreasing the distance between the objects.
Explanation:
Gravitational force depends on mass and distance. The farther the objects are apart, the less gravitational force/pull they have.
Answer:
52,94N
Explanation:
Frictional force is the opposing force that is created between two surfaces that try to move in the same direction or that try to move in opposite directions. The main purpose of a frictional force is to create resistance to the motion of one surface over the other surface.
Calculation:
Le the value of frictional force be Fk, therefore acceleration a = (F- Fk)/m
where :
F is the applied force
m the mass of the cart
a = (F- Fk)/m = 0.8
F - Fk = 0.8m
Fk = F - 0.8m
Fk = 56.3 - (0.8×4.2)
Fk = 52.94 N
The magnitude, in Newtons, of the net frictional force is therefore 52.94N
