She performed a lot of work
Answer:
Size of image: 1.8 cm inverted
Magnification of camera: -0.1
Explanation:
Given:
- = size of bird = 18 cm
- = distance of the bird from the camera = 2 m = 200 cm
- = distance of the film from the camera = 20 cm
Assume:
- = magnification of the camera
- = size of image of the bird
Using sign convention, we have
The hole in the pinhole camera behaves as a convex lens. The other face opposite to the hole face behaves like a film where the image is formed to be seen. So, using the formula of magnification, we have
This means the image of the bird measures 1.8 cm in length where negative sign in the calculation represents that the image formed is inverted.
Hence, the image of the bird on the film is 1.8 cm large.
Now, again using the formula of magnification, we have
Hence, the magnification of the camera is -0.1.
Answer:
In the parallel plate capacitor
The capacitance will decrease between the plates.
The voltage will increase between the plates.
Explanation:
When the distance between the plates increase, then the voltage also increases as it varies with the separation of plates. However the capacitance will decrease upon increasing the distance. As the capacitance depends upon the electric field between the plates. Field is stronger when the plates are closer so capacitance increase. Field will be weaker upon increasing the distance and hence the capacitance decreases.
Answer:If kinetic energy increases, so does the thermal energy, and vice versa.
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