Liquids state than in the solid state because when it is solid the particals cant move as much than in the liquid state
Answer:
E
Explanation:
It is the movement of tetonic plates
The triangle stands for change. X means the distance spring stretched or compressed. so together, it's the change in the distance of the spring stretched or compressed.
Answer: 18.9 calories
Explanation:
The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.
Q = Heat absorbed
m= mass of substance = 1.0 g = 0.001 kg
c = specific heat capacity of aluminium =
Initial temperature = = 847 K
Final temperature = = 933 K
Change in temperature ,
Putting in the values, we get:
(1J=0.24cal)
The number of calories required for this heat up process is 18.9 calories.
Answer:
70.4%
Explanation:
Step one:
given data
input energy= 2280J
output energy= 1,606 Joules of useful kinetic and 55joules waste
hence the useful out put= 1606J
Required
The efficiency of the motor
Step two:
what is the efficiency of a motor?
efficiency is the ratio of mechanical power delivered by the motor (output) to the electrical power supplied to the motor (input)
Efficiency= 1606/2280*100
Efficiency=0.704*100
Efficiency=70.4%