A wave has a speed of 23 m/s and a frequency of 13 Hz. What is the wavelength?

Answers

Answer 1

Answer:

Answer:

1.76923077 meters

Explanation:

wavelength is denoted by the letter lambda it is equal to the speed (v) of a wave in a medium (air , water, light) divided by frequency , equals wavelength . so wavelength = v/f or = 23m/s ÷13hz

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An 8-N force is applied to a 2-kg box to accelerate it to the right across a table. The boxencounters a force of friction of 5 N. What is the acceleration of the object?
(1 Point)
4 m/s2
2.5 m/s2
1.5 m/s2
1 m/s2

Answers

Answer:

1.5

Explanation:

resultant force=8-5=3N

using f=ma

a=f/m

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=1.5

Which of the following statements is an accurate description of vibrations? A. The frequency of infrasonic vibrations is much too high to be heard by humans.
B. Neither ultrasonic nor infrasonic vibrations can be heard by humans.
C. Infrasonic vibrations are used in sonar equipment as well as to detect flaws in steel castings.
D. Ultrasonic vibrations have a frequency lower than the range for normal hearing.

Answers

The accurate description of vibrations is that, neither ultrasonic nor infrasonic vibrations can be heard by humans. The Infrasonic vibration frequency is lower than 20Hz, whereas ultrasonic vibration frequency is greater than 20,000Hz. The normal range of frequency of hearing for humans is only 20Hz-20,000Hz.

the answer is B, Good luck!

What happens to an earthquake's S-waves when they strike the core?A) They bounce off
B) They are absorbed
C) The change into P-waves
D) They change into L-waves

Answers

Answer:

B) They are absorbed

Explanation:

B is correct because S waves can only travel through solid materials. When they hit liquid materials they are absorbed in and undetectable.

Answer:

B) They are absorbed

Explanation:

When they hit the liquid core, S-waves are no longer able to be detected. While P-waves bounce off the liquid core, S-waves are absorbed at the core.

Name three devices that can store electric potential energy

Answers

Potential energy, unlike kinetic, is stored energy. This energy comes from different sources. An object with potential energy also has the ability to produce energy if something triggers it. Example, a charged battery, a car on top of a hill, and capacitors.

the atomic mass of potassium is 39. if its atomic number is 9, it has how many neutrons within each potassium atom?

Answers

Atomic number is actually 19 as it has 19 protons. To make up the mass number of 39 it needs 20 more nucleons, these must come in the form of neutrons so it has 20 neutrons.

A group of physics teachers is taking some time off for a little putt-putt golf. The 15th hold has a large metal rim that putters must use to guide their ball towards the hole. Mr S guides a golf ball around the metal rim. When the ball leaves the rim, which path (1,2 & 3) will the golf ball follow and why?

Answers

Call me nuts, but I can't shake the feeling that there's some kind of a
picture or drawing that's part of this question. Unless I miss my guess,
you copied part of the question, and then decided to stop right there and
not let us see the picture. If my hunch plays out, then we NEED to see
the picture in order to answer the question, and since you haven't shared
it, there is no way to write an answer.

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