1) A machine is an apparatus using or applying mechanical power and having several parts, each with a specific function.
2) Energy is the capacity of a physical system to do work.
3) Fuels are any material that can be made to react with other substances so that it releases energy as heat energy or to be used for work.
4) Measure a volume of an acid and place into a polystyrene cup which is placed into a beaker.
Measure the temperature of the acid with a thermometer.
Add a measured volume of an alkali to the acid.
Measure the temperature rise to calculate the energy change.
5) the ratio of the useful work performed by a machine or in a process to the total energy expended or heat taken in; an action designed to achieve efficiency.
6) Pulley, lever, screw, and inclined plane.
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Answer:The answer is B , 0.20 m/s south
Explanation:
Answer:
The formula for Impedance for circuit with R, C, and L are:

The impedance Z of the series RLC circuit depend upon angular frequency ω. Impedance is measured in ohms and resistance (R), inductance reactance and capacitive reactance. Series RLC circuit consist of the resistance, a capacitance and an inductance connected in the circuits. Electrical impedance is the measurement of the opposition that a circuit present in a current.
Answer:

Explanation:
Mass of block=10 kg
Applied horizontal force =F=20 N
Friction force=f=10 N
We have to find the acceleration of block.
Net force=Applied horizontal force-friction force

Where F= Horizontal force
f=Friction force
m=Mass of object
a=Acceleration of object


Hence, the acceleration of the block=