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3 years ago

What function does the shape of the star-nosed mole’s nose serve?

Physics

1 answer:

horsena [70]3 years ago

6 0

Hello!

The shape of the star-nosed mole's nose helps it to take away the excess heat.

Letter b)

Hugs!

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A liquid is flowing through a horizontal pipe whose radius is m. The pipe bends straight upward through a height of 10.6 m and j

zaharov [31]

Answer:

Volume flow rate $= 1.81 * 10^{-2}$ meter cube per second

Explanation:

As we know that the

Pressure at the two ends would be the same along with volume of flow.

i.e

$P_1 = P_2$

and

$A_1 V_1 = A_2 V_2$

Re arranging the file, we get -

$V_1 = \frac{A_2 V_2}{A_1}$

The flow equation is

$\frac{1}{2}\rho * V_1^2 = \frac{1}{2}\rho * V_2^2 + \rho * g * h\\$

Substituting the value of $V_1$ in above equation, we get -

$V_2 = \sqrt{\frac{2gh}{(\frac{A_2}{A_1})^2-1} }$

Substituting the given values in above equation we get

$V_2 = \sqrt{\frac{2*9.8*10.6}{(\frac{\pi 0.04^2}{\pi 0.02^2} )^2 -1} }\\ V_2 = 3.61 m$

Volume flow rate

$Q_2 = A_2 V_2\\= \pi r_2^2V_2^2\\= 3.14 * 0.04^2 * 3.61 \\= 1.81 * 10^{-2}$

7 0

3 years ago

¿Una persona de 60 corriendo a 4 m/s, tiene más energía cinética que un proyectil de 10 gramos a 300 m/s?

Svet_ta [14]

Explanation:

The question says that "Does a 60 kg person running at 4 m/s have more kinetic energy than a 10 gram projectile at 300 m/s ? "

Speed of a person is 4 m/s

Mass of a person is 60 kg

Kinetic energy of a person is : $K=\dfrac{1}{2}mv^2$

So,

$K=\dfrac{1}{2}\times 60\times 4^2\\\\K=480\ J$

Mass of a projectile is 10 grams or 0.01 kg

Speed of a projectile is 300 m/s

Kinetic energy of a projectile is :

$K=\dfrac{1}{2}mv^2$

$K=\dfrac{1}{2}\times 0.01\times (300)^2\\\\K=450\ J$

So, it is clear that the kinetic energy of a person is more than that of the kinetic energy of a projectile.

8 0

3 years ago

a ball dropped from a height of 10 meters will bounce more times before coming to rest than a ball dropped from a height of 5 me

Contact [7]

Answer:

plz mark brainliest again lol :)

Explanation:

When you drop a ball from a greater height, it has more kinetic energy just before it hits the floor and stores more energy during the bounce—it dents farther as it comes to a stop.

3 0

3 years ago

A sound wave has a frequency of 300 Hz. If the wavelength is .50 m, then what is the speed of

kherson [118]

Answer:

15000 m/s

Explanation:

You just need to multiply the wavelength with the frequency.

7 0

3 years ago

A Hooke's law spring is mounted horizontally over a frictionless surface. The spring is then compressed a distance d and is used

zloy xaker [14]

Answer:

The compression is $\sqrt{2} \ d$ .

Explanation:

A Hooke's law spring compressed has a potential energy

$E_{potential} = \frac{1}{2} k (\Delta x)^2$

where k is the spring constant and $\Delta x$ the distance to the equilibrium position.

A mass m moving at speed v has a kinetic energy

$E_{kinetic} = \frac{1}{2} m v^2$ .

So, in the first part of the problem, the spring is compressed a distance d, and then launch the mass at velocity $v_1$ . Knowing that the energy is constant.