What is the radius of curvature of a plane mirror what is its focal length explain?

How does the frequency of sound relate to its pitch?

Scientific knowledge is both long lasting and open to change. In your own words, explain why scientific knowledge should be re-examined and re-tested from time to time. Include two examples that will support your response.

Twice a year on Earth, the number of hours of darkness is equal to the number of hours of sunlight. These events, where both day and night are 12 hours, are the spring and autumn equinoxes.

Convert 25,000 gram into kilogram ...

How can a small area in the middle of a desert provide an organism what it needs to survive?

Write the energy equivalent to 300 units of electrical energy in joules

Briefly describe why these searches suggest that star-like (our planet-like) objects and black holes cannot account for all the dark matter in the halo of our galaxy.

What two units of measurement are necessary for describing speed?

If 3,600 J of work is done in 3.0 s, what is the power? 0.00083 W 1,200 W 3,600 W 11,000 w

Julia rides her horse 12 miles in 45 minutes. What is her average speed in mi/min? Show Your Work.