If the second harmonic of a certain string is 42 Hz, what is the fundamental frequency of the string?

21 Hz

42 Hz

84 Hz

126 Hz

Is a soild has a mass of 180 g. what is the density of the soild

Discuss the use of headrests in the seats in a car in terms of newtons laws. Use terms and provide a comprehensive in depth answer with references.

Mike believes that electricity can be made using a strong magnetic field and a coil of wire. which question would be appropriate for this statement

Explain the law of conservation of mass. When wood burns, it releases heat and turns into ashes. When the ashes are weighed, they are significantly lower than that of the wood. How is this possible in terms of the law of conservation of mass?

If a source of sound waves is rapidly approaching a person, the sound heard by the person appears to have A. a frequency higher than the original frequency. B. a pitch lower than the original pitch. C. a period higher than the original period. D.

A magnet is pushed into the center of a wire loop and then stops. what is the current in the wire loop when the wire stops moving? explain.

Which feature do highland climates have that lower elevation area do not? A tundra where there are no trees A tree line beyond which trees do not grow Permafrost, or a part of the ground that is permanently frozen An ice cap, or a permanent cover of

As shown in the figure below, Cindy rushes 30 mtoward her truck. She notices she forgot her lunch and returns back to the house. Her total travel time is 90s a. What is Cindy's average velocity over the 90s period? b.

Un atleta que recorre 100 m en 12 s

Assuming equal rates of acceleration in both cases, how much farther would you travel if braking from 59 mi/h to rest than from 25 mi/h?