Using a certain concave mirror, the magnification
was
found to be 4 times as great when the objecte was 25.com
from the mirror as it is , with the object at. 40 cm, from
the mirror, the image being real in both cases. Calculate
the focal length of the mirroy. [Ans. 20cm]

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

Akg a of 55 m at an of 11 ? . if is at 98 km/h, be ?

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.