2. How can iron fillings provide evidence that can be used to explain how two magnets exert forces on each other even though the magnets are not in contact with each other?
Answers
Answer: When the magnet was placed on the glass it attracted the iron filings
Explanation: iron is a negitive n a postive
Answer: k12 unit test
Iron filings can provide evidence that can be used to explain how two magnets exert forces on each other because each of the magnets can attract iron filings. Another thing is that the patterns of the iron fillings show lines of force that make the magnet's magnetic field. For example, when a magnet is placed in a container and you place iron fillings over the lid it makes a pattern showing the lines of forces making the magnetic field
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2. _____ is the transfer of thermal energy due to collisions between particles of matter.
A. Conductors
B. Expansion
C. Heat
D. Insulators
E. Temperature
Answers
Second blank is D. Insulators
2. C. Heat
b. circle graph
c. bar graph
d. scatter plot
this was on my physics test, but idk why... is this even science? but help, please ;-;
Answers
Answer:
The correct answer is c. bar graph.
Explanation:
The best visual tool to show the amount of product formed under different reaction conditions is the bar graph. This tool is also called the bar diagram or the bar chart. The bar graph uses bars to make comparisons among different categories. It can be presented horizontally or vertically. This tool shows that the longer the bar, the greater its value. Bar graphs mainly consist of two axes.
Answers
Answers
But the usual instrument is called a psychrometer, which uses two thermometers to obtain temperatures that indicate the relative humidity.
A psychrometer is an instrument that uses the difference in readings between two thermometers, one having a wet bulb and the other having a dry bulb, to measure the moisture content or relative humidity of air. When air is saturated, the bulbs have the same temperature. When it is less than saturated, the moisture around the wet bulb evaporates, cooling the wet bulb until it is cooled to the temperature where the concentration of water vapor in the air would saturate air at that temperature.
psychrometer
Relative humidity is a measure of water vapor in the air compared with the maximum amount of water vapor the air can hold at that temperature. It can be measured by using a variety of instruments, such as a thin polymer film, a psychrometer, a dew cell, and a hair hygrometer.
sling psycrhometer
A hygrometer or a psychrometer will measure relative humidity.
A hygrometer.
psychrometer
Thermo-hygrograph. It uses two thermometers, one gives dry temperature is is hung in the air, while the second one is dipped in water with the help of a wick. As the evaporation of water depends on the relative humidity in the air, when there is a big difference in dry and wet temperatures it means that humidity is low and vice versa. The exact humidity is found out with the help of a table Relative humidity can be measured by a psychrometer .
of 20 m/s, what is the centripetal force acting on the car?
O
A. 6118 N
O
B. 1300 N
O C. 7982 N
O D. 305.9 N
SUBMIT
Answers
Answer:
6118N
Explanation:
Select all that apply.
A
Water would be a gas at room temperature,
B
Water would boil at 100 degrees Celsius.
C
Water would form droplets.
D
ice would sink.
Answers
Answer:
A. Water would be a gas at room temperature, and
D. Ice would sink in water.
Explanation:
There are three types of intermolecular forces: London dispersion forces, dipole-dipole interactions, and hydrogen bonds. The relative strength of these forces depend on the size of the molecule. However, for small molecules like water (three atoms per molecule,) hydrogen bonds would be much stronger than the other two types of forces.
Without hydrogen bonds, water molecules would be held together only with dipole-dipole interactions and London dispersion forces. To get an idea of what that would be like, consider hydrochloric acid .
and water
contain about the same number of electrons. The H-Cl bond in
is polar, which allows for dipole-dipole interactions. However, only H-O, H-F, and H-N bonds allow for hydrogen bonding. As a result, there won't be any hydrogen bonding between
molecules. Without hydrogen bonding,
boils at well below
under standard pressure. It is a gas at room temperature under standard pressure. That's about the same as what water molecules would behave (physically) without any hydrogen bonds between them.
Also because of hydrogen bonding, the density of ice (solid ) is typically greater than that of water (liquid
.) When compared to water in its liquid state, there are more hydrogen bondings between molecules of water in its solid state. The hydrogen bonds hold the molecules together to form a lattice. Because of this structure due to hydrogen bondings, the molecules are farther apart than they are in the liquid states. As a result, the density of ice is typically smaller than that of water. That would likely not be the case if there was no hydrogen bondings between water molecules.