An unscientific device for locating oil or minerals; a divining rod.
Answer:
τ = - (8.1 N-m) i - (10.8 N-m) j - (8.1 N-m) k
Explanation:
Given
r = (0 m) i + (0.9 m) j - (1.2 m) k
F = (9 N) i + (0 N) j - (9 N) k
We can apply
τ = r x F
τ = ((0 m) i + (0.9 m) j - (1.2 m) k) x ((9 N) i + (0 N) j - (9 N) k)
⇒ τ = - (8.1 N-m) i - (10.8 N-m) j - (8.1 N-m) k
Answer:
Order of hydrocarbons in decreasing order of boiling point:
Paraffin > Hexadecane > Pentane > Dimethylpropane > Butane
Explanation:
Boiling points of hydrocarbons depend upon:
Mass of the hydrocarbon
Intermolecular forces of interaction
Hydrocarbons of greater mass or greater number of carbons have greater molecular mass.
Molecular formula of paraffin is 
Molecular formula of hexadecane is 
Among given hydrocarbons, number of carbon is highest in paraffin and hence has highest boiling point.
Boiling point of paraffin is followed by hexadecane having second highest number of carbon.
Mass of dimethylpropane and pentane are comparable. But boiling point of dimethylpropane is less than pentane. This is because branching decreases intermolecular force of attraction (van der Waal's force) which leads to decrease in boiling point.
No. of carbon in butane is least among given. So its boiling point is lowest.
Hence, Order of hydrocarbons in decreasing order of boiling point:
Paraffin > Hexadecane > Pentane > Dimethylpropane > Butane
Answer:-
ATP Adenosine Triphosphate
Explanation:-
ATP is the name of the high energy compound that cells use directly to fuel other chemical reactions. It is found in all cells. In the mitochondria, every "turn" of the citric acid cycle produces one equivalent of ATP.
ATP + H
2O → ADP + Pi+ energy
ADP is adenosine monophosphate.
The cathode electrode is copper. This means that the concentration of copper must be increased to increase the cell potential. This can be done by diluting the Al3+ solution. Increasing the surface area will not change the current but will increase the voltage. The answer is (D) I and III only.