Answer:
The atom is now a negative charge
Explanation:
Adding electrons makes things negative.
The two ways to determine whether a bar of metal was magnetized or not
are the following:
<span>1.
</span>Rubbing the bar of
metal with a strong magnet.
Find the north pole of the magnet then rub it on
the middle part of the metal to the end. The act of rubbing the magnet several times across the metal
helps the iron atoms (present in the metal) align in one direction. Then test
the magnetism by tapping the metal against a pile of paperclips. If the
paperclip stick, then the metal was magnetized.
<span>2.
</span>Striking the bar of
metal with a hammer.
Position the bar of metal facing north using a compass. Use
a strong tape to secure it on the flat table. Strike the south part of the
metal with a hammer several times. Striking the metal allows the iron atoms to align themselves
in the direction of the Earth’s magnetic field. Then, test the magnetism
of the metal.
Remember that a metal which contain the most iron will become more magnetic and an object is a magnet
if it repels a known magnet.
1. True
2. False
Does that answer your question?
Answer:
Simple cuboidal epithelia
Explanation:
Simple cuboidal epithelia are observed in the lining of the kidney tubules and in the ducts of glands. In simple columnar epithelium, the nucleus of the tall column-like cells tends to be elongated and located in the basal end of the cells.
Answer: 355.66 m/s
Explanation:
Since sound is a mechanical wave, its speed varies with the medium and its properties, such as its temperature.
So, if we want to calculate the speed of sound in air at we can use the following equation that relates with the temperature:
(1)
Where:
is the Heat capacity ratio for air
is the Universal Gas constant
is the air temperature in Kelvin
is the air molar mass
(2)
Finally:
This is the speed of sound at 313 K