3 years ago

Can you answer this please i’ve been stuck on it for a while

Physics

1 answer:

sp2606 [1]3 years ago

7 0

The kinetic energy depends on several things like how cute I am

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Calculate the length of a simple pendulum that oscillates with a frequency of 0.4Hz g=10m/s2 , ^=3.142

earnstyle [38]

Answer:

Explanation:

For simple pendulum the formula is

$T=2\pi\sqrt{\frac{l}{g} }$

Where T is time period , l is length and g is acceleration due to gravity .

$\frac{1}{n} =2\pi\sqrt{\frac{l}{g} }$

n is frequency

Putting the values

$\frac{1}{.4} =2\pi\sqrt{\frac{l}{10} }$

$\frac{l}{10} = .1584$

l = 1.584 m

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3 years ago

a fan acquires a speed of 180 rpm in 4s, starting from rest. calculate the speed of the fan at the end of the 5th second startin

KengaRu [80]

Answer:

225 rpm

Explanation:

The angular acceleration of the fan is given by:

$\alpha = \frac{\omega_f - \omega_i}{\Delta t}$

where

$\omega_f$ is the final angular speed

$\omega_i$ is the initial angular speed

$\Delta t$ is the time interval

For the fan in this problem,

$\omega_i = 0\\\omega_f = 180 rpm\\\Delta t=4 s$

Substituting,

$\alpha = \frac{180-0}{4}=45 rpm/s$

Now we can find the angular speed of the fan at the end of the 5th second, so after t = 5 s. It is given by:

$\omega' = \omega_i + \alpha t$

where

$\omega_i = 0\\\alpha = 45 rpm/s\\t = 5 s$

Substituting,

$\omega' = 0 + (45)(5)=225 rpm$

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2 years ago

Do you divide mass by volume to get density

bogdanovich [222]

Density is the mass of an object divided by its volume. So the answer would be Yes. Hope it helps! (:

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When the mass of an object decreases, the force of gravity - Remains Unchanged - Decreases - increases - Becomes irregular

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The force of gravity decreases

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i just want a reason to live if my mom is always on me about everything and screams in my face to move out i have zero will to l

prisoha [69]

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I understand how u feel if u need someone to talk to I will be here for u my stepmom is like that i will be here for u if u wana talk

Explanation:

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