Which astronomer supported the belief that earth was at the center fo the universe?

a. Kepler

b. Ptolemy

c. Brahe

d. Hubble

A playground merry-go-round has radius 2.40 m and moment of inertia 2100 kgm2 about a vertical axle through its center, and it turns with negligible friction. (a) A child applies an 18.0-N force tangentially to the edge of the merry-go-round for 15.

Match each characteristic with the type of wave it corresponds to. Longitudinal waves Transverse waves The direction the wave travels is parallel to the displacement of the medium. Electromagnetic waves are an example of this type of wave.

Name 2 forces acting on an object at rest Only need 1 got gravity

Which two objects have stored energy? 1. a ball rolling on the ground 2. a small rock sitting on top of a big rock 3. a stretched rubber band 4. a stone lying on the ground

The speed of all electromagnetic waves is 3.00 * 108 meters per second. What is the wavelength of an X-ray with a frequency of 1.18 * 1018 Hz? 2.54 * 1026 meters 3.93 * 109 meters 2.54 * 10-10 meters 3.93 * 10-11 meters

A Find the magnitude of the angular momentum of the second hand on a clock about an axis through the center of the clock face. The clock hand has a length of 15.0 cm and a mass of 6.00 g.

A geologist finds ripples preserved in ancient sedimentary rock that look just like ripples made by water in mud. He concludes that there was once water in that location that created the ripples. Why is this conclusion reasonable?

In science what is the requirement of doing work?

What Fitness Gram test is assessing your cardiovascular endurance?

A graph titled Position versus time for with horizontal axis time (seconds) and vertical axis position (meters). A straight blue line runs with an upward slope from 0 seconds 3 meters to 4 seconds 15 meters. The starting position of this object is m.