Suppose that you measure a galaxy's redshift, and from the redshift you determine that its recession velocity is 30,000 (3*104 kilometers per second. according to hubble's law, approximately how far away is the galaxy?

The boy moving down the hill posses what energy?

In the Winter Olympics, an ice skater may lift his partner high above his head. A typical female ice skater weighs 400 N, and the male can usually lift her 1.4 m above the ice.

Explain how animals communicate in such a biologically dense ecosystem

What is the change in the atomic number when an atom emits an alpha particle?

What color of light in the visible spectrum appears brightest? does this mean that it is the highest energy light?

Adrian read about a new antimicrobial in a popular magazine. The advertisement claimed that the product Bactokil prevents bacterial growth. So, Adrian conducted a controlled experiment to test the product claims.

A world-class sprinter can burst out of the blocks to essentially top speed (of about 11.5 m/s) in the first 15.0 m of the race. what is the average acceleration of this sprinter, and how long does it take her to reach that speed?

How are primary and secondary succession similar and how are they different?

What relates the net force exerted on an object to its mass and acceleration?

I'm a wave, the medium moves parallel to the direction that the wave travels