Answer:
5 no
Explanation:
actually the 4kg lying on table has no influence
it slides towards 4kg weight hung
as it has excess 2kg force
force=miu × m ×g
Metallic elements can exist on their own as individual atoms.
Nonmetals usually exist as molecules, combining with atoms of themselves.
Nonmetals can exist on their own as individual atoms.
Explanation:
Metallic elements can exist on their own as individual atoms. They have a large radius and are stable enough to freely exist as single atoms. The metallic bonding in them gives them stability. Example Gold, Silver, Platinum e.t.c
Non-metals are usually found in combined as state as molecules. They are usually joined together by covalent attraction. The bonds are formed with the atoms shares their valence electrons and their octet is completed. For example nitrogen gas, oxygen gas.
Most noble gases are non-metals that exist as individual mono-atomic gases on their own. The gases are stable and have an octet/duet configuration. For example helium gas, neon gas e.t.c
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Multiply 6 x 60 to get the frequency.
Answer:
Explanation:
Make up a question.
The only change is going to be c.
Suppose they aluminum starts our higher at 50oC
Suppose the copper starts out at 20oC
Suppose the mass of both are 25 grams.
Aluminum
m*2c * deltat
- deltat = 50 - x
- c = 2*c
- m = 25
Copper
m*c*deltat
deltat = x - 20
m = 25
c = c
Now since the amount of heat is the same (this starts out on a heated slab of something).
m*2c * (50 - x) = m * c * x - 20 The m and the c are the same. Cancel them out.
2 * (50 - x) = (x - 20) Remove the brackets.
100 - 2x = x - 20 Add 20 to both sides.
120 - 2x = x Add 2x to both sides.
120 = 3x Divide by 3
x = 40
What does this tell you?
It tells you that the temperature of the aluminum is only going to drop 10 degrees
The copper is going to gain 40 - 20 = 20 degrees.
The heat transfer is actually the same. It doesn't take as much heat to heat copper as it does aluminum. That's shown by the difference in how the temperature changes. One looses 10 degrees. The other gains 20. The transfer is the same because of the way the "c" operates.
