3 years ago

Select the best answer for the question.

1 answer:

6 0

In a stringed musical instrument, the sound frequency of a particular string can be increased by TIGHTENING THE STRING.
Tightening the string of a musical instrument will reduce its size and will make the sound waves to travel faster through the string when the string is plucked and it will produce an higher pitch.

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An astronaut standing on a platform on the moon drops a hammer. if the hammer falls 6.0 meters vertically in 2.7 seconds, what i

Amanda [17]

The distance that is traveled by the astronaut given that the motion is free-fall can be calculated through the equation,

d = Vot + 0.5at²

where d is the distance, Vo is the initial velocity, t is the time, and a is the acceleration. Substituting the known,

6 = (0 m/s)(2.7 s) + 0.5(a)(2.7 s)²

Determining the value of a,
a = 1.646 m/s²

ANSWER: 1.646 m/s²

4 0

4 years ago

Three point charges are positioned on the x axis. If the charges and corresponding positions are +32 µC at x = 0, +20 µC at x =

Crank

Answer:

Fnet = 12 N

Explanation:

Force on a point charge due to another point charge = kq1q2 / d^2

Force on +32uC = due to + 20uC + due to -60uC

where uC = 1 x 10^-6 C and k = 9 x 10^9 N m^2 / C^2

Net Force =

$= \frac{1}{4\pi \epsilon _0} [\frac{32 \times 10^-^6 \times60\times10^-^6}{(60/100)^2}-\frac{32 \times 10^-^6 \times20\times10^-^6}{ (40/100)^2} ]$