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grigory [225]
3 years ago
7

An egg hits the ground with an impulse of 67 Ns and a force of 257 N. What was the amount of

Physics
1 answer:
FromTheMoon [43]3 years ago
8 0

Answer:

0.26seconds

Explanation:

Impulse is the product of force and time

Impulse =Force * Time

Given

Impulse = 67Ns

Force = 257N

Required

Time

From the formula;

Time = Impulse/Force

Time = 67/257

Time = 0.26s

Hence the amount of time is 0.26seconds

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If you apply an unbalanced force to this object it will ______. Mention all that will apply: change velocity, accelerate, change
Papessa [141]

Answer:

All of them: change velocity, accelerate, change position

Explanation:

We can answer this question by using Newton's second law:

F = ma

where

F is the net force on the object

m is the mass of the object

a is the acceleration

We notice that when there is an unbalanced force on the object, F\neq 0, and therefore

a\neq 0

whcih means that the object will accelerate.

But acceleration is the rate of change of velocity, v:

a=\frac{\Delta v}{\Delta t}

And so,

\Delta v \neq 0

which means that the object will change velocity.

If the object is changing velocity, this means that it is also moving: therefore, the position of the object must be changing, so also the option "change position" is correct.

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3 years ago
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krok68 [10]

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3 years ago
Find two words in a vocabulary list that descirbe the bending of a wave
Paraphin [41]
Reflection and refraction 


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4 years ago
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A child swings a tennis ball attached to a 0.626-m string in a horizontal circle above his head at a rate of 4.50 rev/s.
mr_godi [17]

Explanation:

Length of a string, l = 0.626 m

A tennis ball revolves in a horizontal circle above his head at a rate of 4.50 rev/s.

(a) The centripetal acceleration of the tennis ball is given by :

a=\omega^2r\\\\a=(4.5\times 2\pi)^2\times 0.626\\\\=500.44\ m/s^2

(b) When r = 0.626 m and ω = 4.50 rev/s

Speed,

v=r\omega\\\\=0.626\times 4.50 \times 2\pi\\\\=17.69\ m/s

When r = 1 m and ω = 4 rev/s

Speed,

v=r\omega\\\\=1\times 4 \times 2\pi\\\\=25.13\ m/s

Speed is more in second case when child now increases the length of the string to 1.00m but has to decrease the rate of rotation to 4.00 rev/s.

(c) a=\omega^2r\\\\a=(4\times 2\pi)^2\times 1\\\\=631.65\ m/s^2

Hence, this is the required solution.

5 0
3 years ago
A 18.6 V battery does 1,249.0 J of work transferring charge. How much charge is<br> transferred?
saw5 [17]

Answer: 67.2 C

Explanation:

Use formula

Voltage = work / charge

Charge = work / voltage

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Charge = 67.2 C

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