A pipe that is 0.92 m long and open at both ends vibrates in the second overtone with a frequency of   What is the speed of sound in the air in this pipe?

When a diffraction grating having lines/cm is illuminated by monochromatic light, the angle between the central maximum and the fourth order maximum is 44.1 degrees. What is the wavelength of the light?

A positive ion of mass x 10-25 kg enters perpendicular to a magnetic field of T. The ion was initially accelerated by a potential difference of volts. Calculate the radius of the path of the ion in the magnetic field.

A bar magnet is pushed through a coil of wire of cross-sectional area 0.020 m 2 as shown in the figure. The coil has seven turns, and the rate of change of the strength of the magnetic field in it due to the motion of the bar magnet is 0.040 T/s. What is the magnitude of the induced emf in that coil of wire?

The phase angle of a series  RL ac circuit with a 100-Ω resistor and a 20.0-mH inductor is 70.0°. What is the inductive reactance of this circuit?

In a  RLC circuit, the values of the inductance and capacitance are both halved. As a result of this change, the resonance frequency of the circuit is

An iron ring lies in a magnetic field as shown in the diagram. The field is uniformly increasing in magnitude. The induced current in the ring isScreen Shot 2021-07-29 at 3.16.27 PM.png 

How much current must pass through a 400-turn ideal solenoid that is 4.0 cm long to generate a 1.0-T magnetic field at the center? ( μ 0 = 4π × 10 -7 T ∙ m/A)

The earth’s northern magnetic pole acts like

Which of the following statements is true for a series  RLC ac circuit in resonance? (There could be more than one correct choice).