Questions from College Physics

Q: The longest “string” (a thick metal wire) on

The longest “string” (a thick metal wire) on a particular piano is 2.0 m long and has a tension of 300.0 N. It vibrates with a fundamental frequency of 27.5 Hz. What is the total mass of the wire?

Q: Derive Eq. (12-5): (a)

Derive Eq. (12-5): (a) Starting with Eq. (12-4), substitute T = TC + 273.15. (b) Apply the binomial approximation to the square root (see Appendix A.9) and simplify.

Q: Transverse waves travel on five stretched strings with the following properties.

Transverse waves travel on five stretched strings with the following properties. Rank the strings according to the time it takes a transverse wave pulse to travel from one end to the other, from large...

Q: A BMW of mass 2.0 × 103 kg is traveling

A BMW of mass 2.0 × 103 kg is traveling at 42 m/s. It approaches a 1.0 × 103 kg Volkswagen going 25 m/s in the same direction and strikes it in the rear. Neither driver applies the brakes. Ignore the...

Q: Iodine is eliminated from the body through biological processes with an effective

Iodine is eliminated from the body through biological processes with an effective half-life of about 140 days. The radioactive half-life of iodine-131 is 8 days. Suppose some radioactive 131I nuclei a...

Q: Two cars, a Porsche Boxster convertible and a Toyota Scion xB

Two cars, a Porsche Boxster convertible and a Toyota Scion xB, are traveling at constant speeds in the same direction, although the Boxster is 186 m behind the Scion. The speed of the Boxster is 24.4...

Q: Consider the circuit in the diagram. Given: I1 = 2

Consider the circuit in the diagram. Given: I1 = 2.50 A /, / , R1 = 8.00 Ω, and R2 = 5.00 Ω. Find the values of I2, I3, and R3.

Q: Find the potential at the sodium ion, Na+, which is

Find the potential at the sodium ion, Na+, which is surrounded by two chloride ions, Cl−, and a calcium ion, Ca2+, in water as shown in the diagram. The effective charge of the posit...

Q: A 0.15 kg baseball traveling in a horizontal direction with

A 0.15 kg baseball traveling in a horizontal direction with a speed of 20 m/s hits a bat and is popped straight up with a speed of 15 m/s. (a) What is the change in momentum (magnitude and direction)...

Q: Show that c2 = 931.494 MeV/u. [

Show that c2 = 931.494 MeV/u. [Hint: Start with the conversion factors to SI units for MeV and atomic mass units.]