Questions from College Physics

Q: A bicycle travels 3.2 km due east in 0.

A bicycle travels 3.2 km due east in 0.10 h, then 4.8 km at 15.0° east of north in 0.15 h, and finally another 3.2 km due east in 0.10 h to reach its destination. The time lost in turning is negligibl...

Q: The Wheatstone bridge is a circuit used to measure unknown resistances.

The Wheatstone bridge is a circuit used to measure unknown resistances. The bridge in the figure is balanced—no current flows through the galvanometer G (a sensitive detector of current whose operatio...

Q: In a certain region of space, there is a uniform electric

In a certain region of space, there is a uniform electric field V/m directed due east and a uniform magnetic field / also directed due east. What is the electromagnetic force on an electron moving...

Q: A glass lens has a scratch-resistant plastic coating on it

A glass lens has a scratch-resistant plastic coating on it. The speed of light in the glass is 0.67c, and the speed of light in the coating is 0.80c. A ray of light in the coating is incident on the p...

Q: Why is it that your own voice sounds strange to you when

Why is it that your own voice sounds strange to you when you hear it played back on a tape recorder, but your friends all agree that it is just what your voice sounds like? [Hint: Consider the medium...

Q: In Figure 23.11, a coin is right up against

In Figure 23.11, a coin is right up against the far edge of the mug. In picture (a) the coin is just hidden from view and in picture (b) we can almost see the whole coin. If the mug is 6.5 cm in dia...

Q: The prism in the figure is made of crown glass. Its

The prism in the figure is made of crown glass. Its index of refraction ranges from 1.517 for the longest visible wavelengths to 1.538 for the shortest. Find the range of refraction angles for the lig...

Q: (a) Find the electric potential at points a and b

(a) Find the electric potential at points a and b for charges of +4.2 nC and −6.4 nC located as shown in the following figure. (b) What is the potential difference ΔV fo...

Q: Is there a critical angle for a light ray coming from a

Is there a critical angle for a light ray coming from a medium with an index of refraction 1.2 and incident on a medium that has an index of refraction 1.4? If so, what is the critical angle that allo...

Q: The figure shows some light rays reflected from a small defect in

The figure shows some light rays reflected from a small defect in the glass toward the surface of the glass. (a) If θc = 40.00°, what is the index of refraction of the glass?...