5.170kg+4.20kg calculate this for me with the correct number of significant figures

A 1.9 kg ball drops vertically onto a floor, hitting with a speed of 25 m/s. It rebounds with an initial speed of 9.0 m/s. (a) What impulse acts on the ball during the contact? (b) If the ball is in contact with the floor for 0.

Whats the term for climate near equator

Carbon dioxide is a gas produced by___ and used by ___ a) photosynthesis ... carbon dioxide b) animals ... plants c) carbon dioxide ... photosynthesis d) plants ... animals

What is the mass of an object that needs a force of 6000 newtons to increase its speed from rest to 107 m/s in 2.3 seconds?

6) Why do electromagnetic waves not require a medium for travel?

Hydroelectric power uses: wind water coal the sun

Two lightweight metal spheres are suspended near each other from insulating threads. One sphere has a net charge; the other sphere has no net charge. The spheres will: A. Attract each other B. Exert no electrostatic force on each other C.

Read the given list of organisms. squirrel, zebra, tortoise, rabbit, horse What best describes the role of these five organisms in a food web?

What are the SI units for specific heat capacity

What are starburst galaxies and what do they have to do with galaxy evolution?