sound waves

a piano tuner hears one beat every 2.0s when trying to adjust two strings, one of which is sounding 440Hz. how far off in frequency is the other string?

doppler effect

The predominant frequency of a certain police car's siren is 1550Hz when at rest. What frequency do you detect if you move with a speed of 30.0m/s (a) toward the car, and (b) away from the car?

Force

See Attached

Force

Two snowcats tow a housing unit to a new location at McMurdo Base, Antarctica, as shown in Fig. 4-43. The sum of the forces FA and FB exerted on the unit by the horizontal cables is parallel to the line L, and FA = 4900 N....See Attached

oscilloscope

1. How can Lissajous patterns be used in checking out specific frequencies (such as in tuning a piano)? 2. What makes the sound of a violin different from that of a piano when they are playing the same note? 3. Can the wavelength of a signal be measured on an oscilloscope? Explain.

Newton's Laws

Francesca,...dangles her watch from a thin piece of string while the jetliner she is in takes off...notices that the string makes an angle of 25° with respect to the vertical while the aircraft accelerates for takeoff, which takes about 13.5 seconds. Estimate the takeoff speed of the aircraft. (See attachment for full question ...continues

Forces

A jet aircraft is climbing at an angle of 43° above the horizontal and is also accelerating at 4.9 m/s2. What is the total force that the cockpit seat exerts on the 65 kg pilot? Magnitude (N) / Direction (° above the direction of motion of the plane)

Newtons Laws and Friction with Pulleys

In Fig. 5-29 the coefficient of static friction between mass m1 and the table is 0.35, whereas the coefficient of kinetic friction is 0.25. (a) What minimum value of m1 will keep the system from starting to move? m1 = ??kg (See attachment for full questions)

Newtons Laws and Friction

The 69.0 kg climber in Fig. 5-42 is supported in the "chimney" by the friction forces exerted on his shoes and back...What is the minimum normal force he must exert? (See attachment for full question)

Newtons Laws

A window washer pulls herself upward using a bucket-pulley apparatus... The mass of the person plus the bucket is 68 kg. (a) How hard must she pull downward to raise herself slowly at constant speed? (N) (see attached for full questions)