What causes an atom to be neutral? Equal number of protons and neutrons Equal distance between the nucleus and electrons Equal number of electrons and protons Equal distribution of electrons

4. X-ray radiation from diffraction and fluorescence instruments is a) Not very dangerous because the X-rays are absorbed in the air b) Very dangerous but poses little real hazard since instruments are designed to completely enclose all beams c)

Use the diagram below for questions #28 and 29. 28. In the diagram above, which symbol represents the light bulb? 29. In the diagram above, which symbol represents the battery? Use the diagram below for questions #28 and 29.

A submarine is attempting to detect an aircraft carrier transiting the Straits of Malacca. The aircraft carrier has a source level of 90 dB. The submarine's passive sonar has a directivity index of 20 dB and a detection threshold of 15 dB.

During a compression at a constant pressure of 290 Pa, the volume of an ideal gas decreases from 0.62 m3 to 0.21 m3. The initial temperature is 320 K, and the gas loses 160 J as heat.

Why is the time needed to vaporize the sample of water significantly greater than the time needed to melt the sample? A) Significantly more energy is needed to lower the kinetic energy of the molecules.

What is a Nebulas relationship between pressure and gravity

When the net force on an object is greater than 0, how is its related to its acceleration

Explain the difference between kinetic and protial energy.

Edward travels 150 kilometers due west and then 200 kilometers in a direction 60° north of west. What is his displacement in the westerly direction

January 1st 37°F January 7th 48°F January 14th 52°F January 18th 51°F January 21st 45°F January 25th 41°F January 31st 55°F When looking at a data set of numbers, the mean is the average. Look at the table above.