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3 years ago

Can you please answer this??

Physics

2 answers:

Damm [24]3 years ago

5 0

Answer:

the metal

Explanation:

i think the metal will go down faster because there is least amount of friction than the carpet and wood

hope this helped

Natalija [7]3 years ago

5 0

Answer:

independant- different surfaces

dependant- time

metal should be the fastest as it has the lowest friction

Explanation:

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If different groups of scientist have access to the same data, how can they draw different conclusions?

vazorg [7]

If a group of scientists have access to one data, from the data they can draw conclusions either through mathematics or just thought experiments.

Those thought experiments is different for any scientist, no one thinks the same especially when the topic is difficult.

For example when talking about parallel universes, scientists have come up with the weirdest examples of a multiverse. Some thinking of a brane universe, while others say that its a landscape universe, quilted universe. All of their 'evidence' seems correct but they have opposite meanings.

A weird analogy is 'religion'. All the religions seem to have 'evidences' (hardly) that attract people towards it, they all make sense but that doesn't mean that their evidence is right.

----

Now if they're trying to break down the data using maths, there could be a great uncertainty and measurement error that if done enough could change the whole idea behind the data.

Interesting question, I can babble for days for this but lets keep it as that

6 0

3 years ago

Read 2 more answers

What is the formula to find initial velocity?

Inga [223]

Answer:

s = ut + 1/2at^2

Explanation:

s= distance

u= initial velocity

a= acceleration

7 0

3 years ago

We can compare these two interactions on the basis of impulse (see above), but sometimes, we are more interested in the forces (

kiruha [24]

Complete Question

The complete question is shown on the first uploaded image

Answer:

$I = 476 \ N \cdot s$

$I_1 = 14.21 \ N\cdot s$

$F = 20300 \ N$

Explanation:

Considering the first question

From the question we are told that

The force produced is $F = 3400 \ N$

The duration of the punch is $t = 0.14 \ s$

Generally the impulse delivered is mathematically represented as

$I = F * t$

=> $I = 3400 * 0.14$

=> $I = 476 \ N \cdot s$

Considering the second question

The approaching velocity of the ball is $v_b = 45 \ m/s$

The leaving velocity of the ball is $v_l = -53 \ m/s$

The mass of the ball is $m_b = 0.145 \ kg$

Generally the magnitude of the impulse delivered is mathematically represented as

$I_1 = m* v_b - m * v_l$

=> $I_1 = [0.145 * 45] - [0.145 * -53]$

=> $I_1 = 14.21 \ N\cdot s$

Considering the third question

The duration of the impact of the bat is $t _1 = 0.7 \ ms = 0.7 *10^{-3} \ s$

Generally the average force exerted by the bat is mathematically represented as

$F = \frac{I_1}{t_1}$

=> $F = \frac{14.21 }{0.7 *10^{-3}}$

=> $F = 20300 \ N$

7 0

4 years ago

A sphere of radius 0.081029 m is made of aluminum. It is submerged in flowing water with a temperature of 25 °C that results in

Dimas [21]

Answer:

its surface temperature = 54.84 ° C

Explanation:

The density of aluminium $(\rho)$ = 2700 kg/m ³

Heat capacity $( c_p)$ = 897 J/Kg.K

radius of the sphere (r) = 0.081029 m

$T \infty$ = 25 °C

$T_i$ = 124.978 °C

time (t) = 767.276 s

Using the formula :

$\frac{T-T_{ \infty} }{T_i - T_{\infty}}= e^{-\frac{hA}{\rho V c_p}}*t$

where.

$\frac{V}{A}= \frac{r}{3}$

Replacing our values ;we have:

$\frac{T-25 }{124.978 - 25}= e^{-\frac{-103.067*3}{2700*897*0.081029}}*767.276$

$\frac{T-25 }{124.978 - 25}= e^{{-0.001576}*767.276$

$\frac{T-25 }{124.978 - 25}= e^{-1.209}$

$\frac{T-25 }{99.978}= 0.2985$

${T-25 }= 0.2985*{99.978}$

${T-25 }= 29.843433$

${T= 29.843433+25 }$

${T= 54.843433$

T ≅ 54.84 ° C

Therefore, its surface temperature = 54.84 ° C

6 0

4 years ago

How does the amount of energy coming from the energy source (low vs. high) affect the amount of electrical energy created?

Ugo [173]

Answer:

The environmental problems directly related to energy production and Electricity is a secondary energy source that is generated producedfrom primary energy sources:

hope that helps im new so have a good day (:

3 0

2 years ago