Answer:
The salt is dissolved by the water and heat. If the pot isn't boiling, the salt wouldn't dissolve, it would stay undissolved.
Answer:
The density of the wooden cube is
Explanation:
Recall that the weight of the entire piece of wood that is floating must equal the weight of the displaced water in the case we have an object under flotation.
At the same time. we have a relationship between Volume (V), Weight (w) and density given by the formula:
Since both weights must be the same, we can write the following equation:
Answer:
The current drawn by the motor from the line is 4.68 A.
Explanation:
Given that,
Internal resistance of the dc motor, r = 3.2 ohms
Voltage, V = 120 V
Emf in the motor,
We need to find the current drawn by the motor from the line. A dc motor with its rotor and field coils connected in series, applying loop rule we get :
I is current drawn by the motor
So, the current drawn by the motor from the line is 4.68 A. Hence, this is the required solution.
Answer:
(A) 14.7 N
(B) 0.15 m
(C) the speed will become 24.8 m/s while wavelength becomes 0.21 m
Explanation:
frequency (f) = 120 Hz
mass (m) = 1.5 kg
linear mass density (μ) = 0.0480 kg/m
acceleration due to gravity (g) = 9.8 m/s^{2}
(A) tension on the rope (T) = mg = 1.5 x 9.8 = 14.7 N
speed =
speed =
speed = 17.5 m/s
(B) wavelength = velocity / frequency
wavelength = 17.5 / 120 = 0.15 m
(C) when the mass are increased to 3.00 kg
tension now becomes = mg = 3 x 9.8 = 29.4 N
therefore speed = = = 24.8 m/s
wavelength now becomes = velocity / frequency = 24.8 / 120 = 0.21 m
hence the speed will become 24.8 m/s while wavelength becomes 0.21 m