Magnification is the ratio of the image's height to object's height or the ratio of image distance to object distance.
That is; Magnification = height of the image/height of object= image distance/object distance
= x/4 = 21/8
x = (21 × 4)/8
= 10.5 cm
The height of the image is 10.5 cm
The mirror in this case is a concave mirror, since when the object is placed between the principal focus and the concave mirror, it forms a virtual magnified image on the other side ofthe mirror (that is why we have a negative image distance).
Answer:Rearrange the equation F = ma to solve for acceleration.
You can change this formula around to solve for acceleration by dividing both sides by the mass, so: a = F/m. To find the acceleration, simply divide the force by the mass of the object being accelerated.
Explanation:
Answer:
dynamic im pretty sure that's it
The frequency of the radio waves from the fm station is:
And the speed of the waves corresponds to the speed of light:
Therefore, the wavelength of the radio waves can be found by using the following equation:
Answer: The correct answer is option (A).
Explanation:
Cohesive forces: These are are type of forces which persist between the molecules. Inter-molecular forces in between the molecules of the same substance like : hydrogen bonding, weak Van der Waals forces.
So, from the given option the most relevant option going with the definition of cohesive forces is "Forces of attraction between water molecules" that forces present between the molecules of substance (here water).
Hence, the correct answer is option (A.)