When groundwater heated by magma rises to the surface and collects in a natural pool, it is called a
a. hot spring.
b. geyser.
c. vent.
d. pyroclastic flow.

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

Iwill give 30 points to whoever answers ! what is the formula for actual mechanical advantage and ideal mechanical advantage?

Positrons are spontaneously emitted from the nuclei of