The sky, which was bright blue, is now dark. you look up expecting to see a halo of light in the sky. what just occurred?

(A. an aurora

(B. a solar eclipse

(C. a solar black out

(D. a lunar eclipse

Bottlenose dolphins use echolocation pulses with a frequency of about 100 kHz, higher than the frequencies used by most bats. Why might you expect these water-dwelling creatures to use higher echolocation frequencies than bats? a. Word Bank-b.

In both transverse and longitudinal waves, the energy of the wave travels through but the particles do not move permanently. True False

Is a summer sausage a element compound or a mixture?

You must exert a force of 4.5 N on a book to slide it across a table. If you do 2.7 j of work in the process, how far have you moved the book?

An object is lifted from the surface of a spherical planet to an altitude equal to the radius of the planet. As a result

How does changing depth affect water pressure

The mass of a rigid rod is 0.60 kg and its length is 39.0 cm. Calculate the moment of inertia (in kg · m2) for the rod if it is pivoted about an axis through the center of mass of the rod. (Assume the axis is perpendicular to the rod.

Does a rolling basketball have kinetic energy

Noah Formula is in an airplane which is flying at constant speed in a circular course of radius 6500 m, circling O'Hare's airplane prior to landing. Noah observed that the plane completes each round trip in 345 seconds (5 minutes & 45 seconds).

What happens to particles when a substance gains energy and changes state?