Answer:
three balls have the same speed
Explanation:
In a parabolic motion we have that
![v_{x}=v_{0}cos\alpha\\v_{y}=-gt+v_{0}sin\alpha\\v=\sqrt{v_{x}^{2}+v_{y}^{2}}\\](https://tex.z-dn.net/?f=v_%7Bx%7D%3Dv_%7B0%7Dcos%5Calpha%5C%5Cv_%7By%7D%3D-gt%2Bv_%7B0%7Dsin%5Calpha%5C%5Cv%3D%5Csqrt%7Bv_%7Bx%7D%5E%7B2%7D%2Bv_%7By%7D%5E%7B2%7D%7D%5C%5C)
but the time just before the balls hit the ground is
![t=\frac{2v_{0}sin\alpha}{g}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B2v_%7B0%7Dsin%5Calpha%7D%7Bg%7D)
Hence we have
ball A
![v=\sqrt{v_{0}^{2}cos^{2}(0)+(-g\frac{2v_{0}sin(0)}{g}+v_{0}sin(0))^{2}}\\v=\sqrt{v_{0}^{2}}=v_{0}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7Bv_%7B0%7D%5E%7B2%7Dcos%5E%7B2%7D%280%29%2B%28-g%5Cfrac%7B2v_%7B0%7Dsin%280%29%7D%7Bg%7D%2Bv_%7B0%7Dsin%280%29%29%5E%7B2%7D%7D%5C%5Cv%3D%5Csqrt%7Bv_%7B0%7D%5E%7B2%7D%7D%3Dv_%7B0%7D)
ball B
![v=\sqrt{v_{0}^{2}cos^{2}(45)+(-g\frac{2v_{0}sin(45)}{g}+v_{0}sin(45))^{2}}\\v=\sqrt{v_{0}^{2}(\frac{\sqrt{2}}{2})^{2}+v_{0}^{2}(\frac{\sqrt{2}}{2})^{2}}\\v=\sqrt{v_{0}^{2}}=v_{0}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7Bv_%7B0%7D%5E%7B2%7Dcos%5E%7B2%7D%2845%29%2B%28-g%5Cfrac%7B2v_%7B0%7Dsin%2845%29%7D%7Bg%7D%2Bv_%7B0%7Dsin%2845%29%29%5E%7B2%7D%7D%5C%5Cv%3D%5Csqrt%7Bv_%7B0%7D%5E%7B2%7D%28%5Cfrac%7B%5Csqrt%7B2%7D%7D%7B2%7D%29%5E%7B2%7D%2Bv_%7B0%7D%5E%7B2%7D%28%5Cfrac%7B%5Csqrt%7B2%7D%7D%7B2%7D%29%5E%7B2%7D%7D%5C%5Cv%3D%5Csqrt%7Bv_%7B0%7D%5E%7B2%7D%7D%3Dv_%7B0%7D)
ball C
![v=\sqrt{v_{0}^{2}cos^{2}(-45)+(-g\frac{2v_{0}sin(-45)}{g}+v_{0}sin(-45))^{2}}\\v=\sqrt{v_{0}^{2}(\frac{\sqrt{2}}{2})^{2}+v_{0}^{2}(\frac{\sqrt{2}}{2})^{2}}\\v=\sqrt{v_{0}^{2}}=v_{0}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7Bv_%7B0%7D%5E%7B2%7Dcos%5E%7B2%7D%28-45%29%2B%28-g%5Cfrac%7B2v_%7B0%7Dsin%28-45%29%7D%7Bg%7D%2Bv_%7B0%7Dsin%28-45%29%29%5E%7B2%7D%7D%5C%5Cv%3D%5Csqrt%7Bv_%7B0%7D%5E%7B2%7D%28%5Cfrac%7B%5Csqrt%7B2%7D%7D%7B2%7D%29%5E%7B2%7D%2Bv_%7B0%7D%5E%7B2%7D%28%5Cfrac%7B%5Csqrt%7B2%7D%7D%7B2%7D%29%5E%7B2%7D%7D%5C%5Cv%3D%5Csqrt%7Bv_%7B0%7D%5E%7B2%7D%7D%3Dv_%7B0%7D)
Hence, all three balls have the same speed just before hit the groug
vA=vB=vC
I hope this is useful for you
regards
False. p waves, than s waves
Answer:
Protons, Neutrons, and electrons
Explanation:
Protons, electrons and neutrons are subatomic particles
Protons is positively charged particle yan
The electrons a negatively cacricated particle
Neutrons are particles that have no charge
Answer:
I would say it is recycling nonrenewable minerals instead of throwing them away.
Explanation:
using grocery bags only once before disposing them is also bad, but plastic is not really a resource compared to how minerals are resources.
if we recycle nonrenewable resources instead of throwing them away we would damage true resources.
360.67 is the speed of waves on a violin string of mass 707 mg and length of 21.4 cm if the fundamental frequency is 867 Hz.
Mass per unit length of string н = mass/length
= 505×10⁻⁶ kg/ 0.204 m
= 2.47×10-³ kg/m
∫о
Fundamental frequency ∫о=884 Hz
a. Speed of waves v = 2L∫о
= 2×0.204 m x 884 Hz
=360.67 m/s.
For example, if the fundamental frequency is 50 Hz (also called the first harmonic), the second harmonic is 100 Hz (50 * 2 = 100 Hz), and the third harmonic is 150 Hz (50 * 3 = 150 Hz ). Such.
The fundamental frequency is the lowest frequency of the resonant system. This is an important concept in many aspects of musical instruments and engineering. For example, all harmonics of a particular wave are based on the fundamental frequency.
Learn more about the fundamental frequency at
brainly.com/question/1967686
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