Questions from College Physics

Q: Which decay mode would you expect for radioactive /:

Which decay mode would you expect for radioactive /: α, β−, or β +? Explain. [Hint: Look at the neutron-to-proton ratio.]

Q: Some animals are capable of detecting magnetic fields and use this sense

Some animals are capable of detecting magnetic fields and use this sense to help them navigate. Suppose a high-voltage direct- current power line carries a current of 5.0 kA. (a) How far from the wir...

Q: A solenoid of length 0.256 m and radius 2.

A solenoid of length 0.256 m and radius 2.0 cm has 244 turns of wire. What is the magnitude of the magnetic field well inside the solenoid when there is a current of 4.5 A in the wire?

Q: Speedometer readings are obtained and graphed as a car skids to a

Speedometer readings are obtained and graphed as a car skids to a stop along a straight-line path. How far does the car move between t = 0 and t = 16 s? Sketch a motion diagram showing the position of...

Q: A dolphin wants to swim directly back to its home bay,

A dolphin wants to swim directly back to its home bay, which is 0.80 km due west. It can swim at a speed of 4.00 m/s relative to the water, but a uniform water current flows with speed 2.83 m/s in the...

Q: Two long straight parallel wires separated by 8.0 cm carry

Two long straight parallel wires separated by 8.0 cm carry currents of equal magnitude but heading in opposite directions. The wires are shown perpendicular to the plane of this page. Point P is 2.0 c...

Q: Two parallel wires in a horizontal plane carry currents I1 and I2

Two parallel wires in a horizontal plane carry currents I1 and I2 to the right. The wires each have length L and are separated by a distance d. Find the magnitudes and directions of the (a) the magne...

Q: In naturally occurring potassium, 0.0117% of the nuclei

In naturally occurring potassium, 0.0117% of the nuclei are radioactive 40K. (a) What mass of 40K is found in a broccoli stalk containing 300 mg of potassium? (b) What is the activity of this brocco...

Q: Two concentric circular wire loops in the same plane each carry a

Two concentric circular wire loops in the same plane each carry a current. The larger loop has a current of 8.46 A circulating clockwise and has a radius of 6.20 cm. The smaller loop has a radius of 4...

Q: ɦ Photons of energy E = 4.000 keV undergo Compton

ɦ Photons of energy E = 4.000 keV undergo Compton scattering. What is the largest possible change in photon energy, measured as a fraction of the incident photon's energy (E − E′)/E?