What is the density of iron if 5.0 cm^3 has a mass of 39.5 g
2 answers:
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Answer:
The torque on the loop is Nm
Explanation:
Given:
Current A
Magnetic field T
Area of loop
Angle between magnetic field and area vector 21°
Form the formula of torque in case of magnetic field,
г
Where magnetic moment
г
г
г Nm
Therefore, the torque on the loop is Nm
Answer:
Pi(3.14) radians or 180º degrees
Explanation:
First of all, we need to obtain the wavelength of a wave traveling to the speed of sound and 420 Hz of frequency.
The formula is:
where l = wavelength in meters
With current values:
l = 336 [m/s]/420[1/s] = 0.8 meters
Since a complete cycle (360º or 2pi radians) needs 0.8 meters to complete, 0.4 meters or 40 cm is just half of it, making a 180º degree phase or 3.14 radians.