Work and Energy Complete the crossword puzzle below
3
e
1
1
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Created using the Crossword Maket on TheTeachers Corner se
Across
Down
3. total amount of potential and kinetic
1. energy cannot be created or destroyed it
energy
can only change forms
4. energy from a moving object
2. energy stored in an object
6. the energy stored within chemical bonds 5. the unit for work - Nxd
8. energy stored in an object like a spring or 7. energy of heat
rubber band
9. anything that falls has gravitational
potential energy
10. the rate at which work is done
11. occurs when a force make an object
move in the same direction as the force

Chapter 23, problem 075 the figure shows a geiger counter, a device used to detect ionizing radiation (radiation that causes ionization of atoms). the counter consists of a thin, positively charged central wire surrounded by a concentric, circular, conducting cylindrical shell with an equal negative charge. thus, a strong radial electric field is set up inside the shell. the shell contains a low-pressure inert gas. a particle of radiation entering the device through the shell wall ionizes a few of the gas atoms. the resulting free electrons (e) are drawn to the positive wire. however, the electric field is so intense that, between collisions with gas atoms, the free electrons gain energy sufficient to ionize these atoms also. more free electrons are thereby created, and the process is repeated until the electrons reach the wire. the resulting "avalanche" of electrons is collected by the wire, generating a signal that is used to record the passage of the original particle of radiation. suppose the radius of the central wire is 24 âµm, the inner radius of the shell 2.3 cm, and the length of the shell 14 cm. if the electric field at the shell's inner wall is 2.8 ă— 104 n/c, what is the total positive charge on the central wire?

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j