Based on this cell from the periodic table, which statement is true for the
2 answers:
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Answer : Total electrical energy is 36000 J.
Explanation :
It is given that,
Power of electric toaster, P = 1200 Watts
Voltage, V = 120 Volts
Time, t = 30 s
Electric energy is defined as the product of the power and the time taken.
Total electrical energy used to operate the toaster for 30 seconds is 36000 J.
Answer:
0.1164 m
0.49387 m
Explanation:
m = Mass = 5 kg
g = Acceleration due to gravity = 9.81 m/s²
h = Height from which brick falls = 12 m
k = Spring constant = 8 kN/m
a) Potential energy of the brick
Potential energy in spring
The compression of spring = 0.5-0.3836 = 0.1164 m
b) Weight of the brick
The final length of the spring = 0.5-0.00613 = 0.49387 m