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3 years ago

5. Stopping a fast-moving object is harder than stopping a slow-moving one. True False

Physics

2 answers:

Strike441 [17]3 years ago

6 0

True because well it’s moving fast lol sometimes ur eyes have a hard time following its speed

NeX [460]3 years ago

3 0

True because it’s fast

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One disadvantage to experimental research is that experimental conditions do not always reflect reality.

Daniel [21]

Answer:

true

Explanation:

took the test

4 0

3 years ago

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All the bodies whether large or small fall with

Alona [7]

Gravity as all bodies whether large or small have mass.

7 0

3 years ago

If a wave travels 16 meters in 2 seconds, what is its wave speed?

GarryVolchara [31]

Wave speed is 8 m/s

Explanation:

Wave speed or speed of the wave is given by the formula

v = distance traveled by the wave/time

Here, distance traveled = 16 m and time = 2 s

⇒ Wave speed = 16/2 = 8 m/s

7 0

3 years ago

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

4 0

3 years ago

If an object is moving at 2m/s towards a porcelain vase, do you think it will have enough momentum to brake the vase?

Alex Ar [27]

Answer: No

Explanation:

Momentum $p$ refers to how much force is needed to change the motion of a body or object by changing its direction or braking it. In addition, momentum is directly proportional to the mass $m$ and the velocity $v$ :

$p=mv$

Now, assuming both the object and the porcelain vase have the same velocity $v=2m/s$ but different mass, and assuming the mass of the vase is greater than the mass of the object; the momentum of the porcelain vase will be also greater than the momentum of the object.

Hence, the object will not have enough momentum to brake the vase.

8 0

3 years ago