2 years ago

C. A rocket moves from the velocity

Physics

1 answer:

Pavlova-9 [17]2 years ago

6 0

Answer:

20s

Explanation:

t=d/(V2-V1)

t= 80000m/(6000-2000)

t= 20s

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Change in velocity divided by time. Rate of change of velocity of an object

trapecia [35]

I think it is acceleration

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3 years ago

Impulse equals?<br> A) momentum x velocity<br> B) momentum x time<br> C) mass x velocity

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Answer:

Explanation:

The impulse experienced by an object is the force•time.

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3 years ago

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Suppose that the strings on a violin are stretched with the same tension and each has the same length between its two fixed ends

lesya692 [45]

Answer:

0.00384 kg/m

Explanation:

The fundamental frequency of string waves is given by

$f=\frac{1}{2L}\sqrt{\frac{F}{\mu}}$

For some tension (F) and length (L)

$f\propto\frac{1}{\mu}$

Fundamental frequency of G string

$f_G=196\ Hz$

Fundamental frequency of E string

$f_E=659.3\ Hz$

Linear mass density of E string is

$\mu_E=3.4\times 10^{-4}\ kg/m$

So,

$\frac{F_G}{F_E}=\sqrt{\frac{\mu_E}{\mu_G}}\\\Rightarrow \frac{F_G^2}{F_E^2}=\frac{\mu_E}{\mu_G}\\\Rightarrow \mu_G=3.4\times 10^{-4}\times \frac{659.3^2}{196^2}\\\Rightarrow \mu_G=0.00384\ kg/m$

The linear density of the G string is 0.00384 kg/m

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3 years ago

5. During a heat transfer investigation, students filled two cups with water. One cup contains 100mL of cold water while the oth

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Answer:

D.Conduction, because the metal wire was in direct contact with water in both containers

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3 years ago

PLEASE HELP <3

AVprozaik [17]

Answer:

The mass of Mr. Thomson’s prius is 2650 kg.

Explanation:

We are given with, the kinetic energy of Mr. Thomson’s prius is 641300 J

He is moving with a velocity of 22 m/s

It is required to find the mass of Mr. Thomson’s prius.

Due to his motion, a kinetic energy will possess by him. The mathematical form of kinetic energy is given by :

$K=\dfrac{1}{2}mv^2$

Solving for m

$m=\dfrac{2K}{v^2}$

Plugging all the values, we get :

$m=\dfrac{2K}{v^2}\\\\m=\dfrac{2\times 641300}{(22)^2}\\\\m=2650\ kg$

So, the mass of Mr. Thomson’s prius is 2650 kg.

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3 years ago