How do scientists determine what the Milky Way looks like

What country is a territory of u. s and doesn't require a passport for travel

What potential difference is needed to accelerate a he + ion (charge + e, mass 4u) from rest to a speed of 1.8*106 m/s?

If you were carefully watching this planet during the entire orbit would the speed of the planet be increasing, decreasing, or staying the same

How the behavior of waves is affected by a medium

If frequency goes down, what happens to wavelength? Does it get shorter or longer?

Salt water has greater density than fresh water. A boat floats in both fresh water and in salt 12) water. Where is the buoyant force greater on the boat?

A 1000-kg space probe is motionless in space. to start moving, its main engine is fired for 5 s during which time it ejects exhaust gases at 5000 m/s. at the end of this process it is moving at 20 m/s. the approximate mass of the ejected gas is:

In the fishbowl, the glass, water, rocks, and plastic plants are in thermal equilibrium. This situation means the temperature of the rocks is? F. If the water is 75 degrees

An archer shoots an arrow at a 75.0 m distant target; the bullâs-eye of the target is at same height as the release height of the arrow. (a) at what angle must the arrow be released to hit the bullâs-eye if its initial speed is 35.

Which of the following is considered a contact forces?1) the force between two magnets. 2) the gravitational pull of a planet. 3) friction between an object and air. 4) the force between two charged particles.