Explanation:
Given parameters:
Power of the toaster = 600W
Voltage = 120V
Unknown:
Current = ?
Resistance = ?
Solution:
The power in the circuit is related to resistance and current using the expression below;
P = IV
P =
P is the power
I is the current
V is the voltage
R is the resistance
To find the current;
I = = = 5A
Now, resistance;
V² = PR
R = = = 24ohms
Answer:
ωf =1.78 rev/s
Explanation:
it is a non elastic collision, so conservation of angular momentum is used. and there id no friction
I₁ωi₁ + I₂ωi₂ = (I₁ + I₂)ωf
ωi₁ = 2.0 rev/s*(2π) rad/rev = 4.0π rad/s
assume ωi₂ = 0
Sol the equation to wf
ωf = (½m₁r₁²)ωi₁ / (½m₁r₁² + ½m₂r₂²)
ωf = (m₁r₁²)*ωi₁ / (m₁r₁² + m₂r₂²)
ωf = (5.0kg*(0.18m)²)4.0 π rad/s / ((5.0kg*(0.18m)²) + (3.1*(0.08m)²))
ωf =11.19 rad/s/ 2π
ωf =1.78 rev/s
The right answer is D, the aplitude of summaric wave.
The sugar cube experiment in the laboratory gives us a good approximation of the amount of energy that can be derived from the sugar cube because the amount of energy is neither created or destroyed, it is just converted to another form. If the energy from the sugar cube is converted to other form in the lab then, it is possible that same amount of energy will be derived.
Explanation:
Hints:
Use the formula below to find the period.
Where f is the frequency in Hertz, and T is the time period in seconds.
To calculate the wavelength
use:
frequency=speed×wavelength
use the speed of sound. Make wavelength the subject of the formula and solve