The low pressure system wind flow in a counterclockwise direction toward the center because low pressure are connected, and in fact often generally, by upper atmosphere with winds. Winds generally blow from high pressure to low pressure areas at the surface. The direction of deflection is caused by the rotation of the Earth and the resulting Coriolis effect.
A way to remember this is.....some stoners like to get "high around the clock" (as in clockwise, but please don't do this!!)
Low pressure systems usually bring cloudy stormy conditions, while high pressure system bring clear bright skies and in the summer, warm weather.
Answer:
C
Explanation:
If the enthalpy change (i.e. Δ<em>H</em>) of a reaction is negative, then the reaction releases heat and is hence exothermic.
Hence, our answer is C.
Conversely, if Δ<em>H</em> is positive, the reaction absorbs heat and is endothermic.
Δ<em>H</em> tells us nothing about the speed of the reaction.
While Δ<em>H</em> influences free-energy change (Δ<em>G</em> = Δ<em>H</em> - <em>T</em>Δ<em>S</em>), we cannot predict the sign of Δ<em>G</em> given only Δ<em>H </em>(recall that a reaction is spontaneous if Δ<em>G</em> < 0).
The answer is Single Replacement.
Answer:
200 °C
Explanation:
Let’s convert all the temperatures to the same scale, say, Celsius.
<em>Celsius</em>
Water boils at 100 °C, so 200 °C is the temperature of <em>superheated steam</em>.
<em>Fahrenheit
</em>
Water boils at 212 °F, so 200 °F is <em>just below the boiling point of water</em>.
<em>Kelvin
</em>
Standard temperature is 0 °C = 273.15 K. Ice melts at 273.15 K (0 °C), so
200 K is <em>well below the melting point of ice</em>.
C = K – 273.15
C = 200 -273.15 = -73 °C
Thus, 200 °C is the hottest temperature.
atoms are made of 3 types of sub atomic particles; electrons, protons and neutrons
Of these particles, electrons are involved in the chemical reactions.
Therefore chemical properties of the element are determined by the electrons, and that too mostly the valence electrons. Valence electrons are the electrons in the outermost energy shell.
Atoms with same number of valence electrons have similar chemical properties. atoms having same number of valence electrons are classified into groups.
So elements of the same group have same number of valence electrons, hence similar chemical properties
Ca has 2 valence electrons so it belongs to group 2. Of the given elements
only Mg belongs to group 2. Therefore Mg has the most common properties with Ca
