A guitar creates sound waves of different pitches when the strings are plucked. How do the sound waves of the higher-pitched notes compare to the sound waves of the lower-pitched notes?
A
The sound waves of notes with higher pitches travel at slower speeds.
B
The sound waves of notes with higher pitches have lower amplitudes.
D
The sound waves of notes with higher pitches have higher
frequencies.
The sound waves of notes with higher pitches have higher
wavelengths.

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.