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3 years ago

A 3.5 kg book is sitting at rest on a table. what is the value of the normal force being exerted by the table on the book?

Physics

1 answer:

Ira Lisetskai [31]3 years ago

6 0

This is 3.5 * 9.8 (where 9.8 ms-2 is the acceleration due to gravity).

= 34.3 Newtons ( answer).

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What is surface tension<br><br>

uysha [10]

Answer:

Surface tension is the tendency of liquid surfaces to shrink into the minimum surface area possible. Surface tension allows insects, usually denser than water, to float and slide on a water surface.

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3 years ago

A 0.35-kgkg cord is stretched between two supports, 7.4 mm apart. When one support is struck by a hammer, a transverse wave trav

Agata [3.3K]

Answer:

The tension in the string is $T = 1.49*10^{-6}N$ .

Explanation:

For a string with tension $T$ and linear density $\mu_d$ carrying a transverse wave at speed $v$ it is true that

$v = \sqrt{\dfrac{T}{\mu_d} }$

solving for $T$ we get:

$T = \dfrac{v^2}{\mu_d}.$

Now, the transverse wave covers the distance of 7.4mm in 0.88s, which means it's speed is

$v =\dfrac{7.4*10^{-3}m}{0.88s} \\\\v = 8.4*10^{-3}s$

And it's linear density (mass per unit length) is

$\mu_d = \dfrac{0.35kg}{7.4*10^{-3}m} \\\\\mu_d = 47.3kg/m$

Therefore, the tension in the cord is

$T = \dfrac{(8.4*10^{-3}m/s^2)^2}{47.3kg/m}.$

$\boxed{T = 1.5*10^{-6}N}$

or in micro newtons

$T =1.5\mu N$

4 0

3 years ago

What is the relationship between work and power

Mashcka [7]

Power is the rate work is usually done in.

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2 years ago

Read 2 more answers

un jugador de beisbol batea un foul recto en el aire.la pelota deja el bate con una rapidez de 120 km/h. en ausencia de resisten

lina2011 [118]

Answer:

120 km/h

Explanation:

This is a case of a parabolic motion. For this kind of motion the horizontal component of the velocity does not change in the complete trajectory. That is:

$v_x=constant$

Then, the velocity of the ball at the moment in which the catcher caught the ball is:

$v=120\frac{km}{h}$

the velocity of the ball is 120 km/h.

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3 years ago

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BlackZzzverrR [31]

Answer:.

Explanation:

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3 years ago