The ability of singers to shatter glass is due to the control of frequency in their voices. The sound waves will vibrate the air particles that surround the glass at its resonant frequency. The glass will break if a singer sings too loudly.
Yes, two people can do different work and have the same power.
The circuit breaker will tripped. Details below
<h3>What is power? </h3>
This is defined as the rate in which energy is consumed. Electrical power is expressed mathematically as:
Power (P) = voltage (V) × current (I)
P = IV
<h3>How to determine the total power</h3>
The following data were obtained from the question:
- Power of heater = 1.50×10³ W
- Power of toaster = 750 W
- Power of grill = 1×10³W
- Total power = ?
Total power = power of heat + power of toaster + power of grill
Total power = 1.50×10³ + 750 + 1×10³
Total power = 3250 W
<h3>How to determine whether or not the circuit breaker will tripped</h3>
To determine if the circuit breaker will tripped or not, we shall determine the current used by the appliances. Detail below:
- Total power (P) = 3250 W
- Voltage (V)= 120 V
- Current (I) =?
P = IV
Divide both side by V
I = P / V
I = 3250 / 120
I = 27.08 A
Since the current used by the three appliances (i.e 27.08 A) is greater than the current the circuit breaker (i.e 25 A), can with stand,thus, the circuit breaker will tripped
Learn more about electrical power:
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Answer:
14.8 kg
Explanation:
We are given that
We have to find the mass of the pulley.
According to question
Moment of inertia of pulley=
Where 
Hence, the mass of the pulley=14.8 kg
