AgentPangolin

23.04.2021 • 

Physics

A student is carrying out an investigation in which a string of known length is plucked and then the student measures the resulting frequency of vibration in the string to determine the speed of the waves. If the student increases the tension in the string, how will it affect the frequency and speed of the waves in the string? (DOK 3) Question 15 options:

A. The speed will increase and the frequency will remain the same because the properties of the medium has changed but the wavelength will be the same.

B. Both the frequency and speed will increase because the properties of the medium have changed and the wavelength stays the same.

C. The frequency will increase but the speed will remain the same because the medium is the same but the wavelength is smaller.

D. Neither the frequency or the speed will change because the medium is the same.

Ответ:

reycaden

22.08.2021

Physics

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 U=18.75 J

Explanation:

given that

Mass ,m = 0.5 kg

Initial velocity , u= 10 m/s

angle, θ = 60°

The maximum height in the projectile motion h is given as follows

h=3.75 m

The potential energy is given as

U = m g h

U= 0.5 x 10 x 3.75 J

U=18.75 J

Therefore the potential energy at the highest point will be 18.75 J.

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