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3 years ago

Which of the following processes results in the greatest gain in kinetic energy?

Physics

1 answer:

Sunny_sXe [5.5K]3 years ago

7 0

Thanks for asking your question!

Answer:

D: Sublimation

Explanation:

Sublimation occurs when a substance changes from a solid into a gas. Increases in temperature causes the kinetic energy of particles to also increase. This allows the particles to overcome the intermolecular forces and become mobile. Low pressure also increases the particles' kinetic energy.

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A ball is fixed to the end of a string which is attached to the ceiling at point P. As the drawing shows, the ball is projected

sergiy2304 [10]

Answer:

a. The balls initial kinetic energy.

Explanation:

As we know that initially speed is given to the ball downwards so that it moved in a circle so then finally reached to point B

Now given that point B is higher than the initial position A from which it is projected

Now by energy conservation we know that

$K_i + U_i = K_f + U_f$

since final speed is zero so we have

$K_i + mgh_a = 0 + mgh_b$

$h_b = h_a + \frac{K_i}{mg}$

so from above equation we can say that since initial kinetic energy is given to the ball so it will be able to reach the point which is higher than its initial position

so correct answer is

a. The balls initial kinetic energy.

5 0

4 years ago

Your heart pumps blood at a pressure of 100 mmHg and flow speed of 60 cm/s. At your brain, the blood enters capillaries with suc

Savatey [412]

Answer:

1.28 m

Explanation:

Generally, pressure of fluid is given by

$P=\rho g h$ where g is acceleration due to gravity, h is the height and $\rho$ is the density

Considering that the pressure for mercury is same as for blood only that the height and density of fluid are different then

$\rho_b g h_b= \rho_m g h_m$

Since g is constant, then

$\rho_b h_b= \rho_m h_m$

Making $h_b$ the subject of the formula then

$h_b=\frac {\rho_m h_m}{\rho_b}$

Where subscripts m and b denote mercury and blood respectively

Assuming density of blood is 1060 Kg/m3, density of mercury as 13600 Kg/m3 and substituting height of mercury for 0.1 m then

$h_b=\frac {13600*0.1}{1060}=1.283018868 m \approx 1.28 m$

7 0

3 years ago

When are magnets attracted and when are they repelled?

ohaa [14]

when South and North poles are placed together they attract as they are opposite poles. In magnets opposite poles are attracted and like poles are repelled. 

6 0

4 years ago

Read 2 more answers

The management information base (MIB) is a repository of data maintained at a managing entity site, providing the network manage

MaRussiya [10]

The management information base (MIB) is a repository of data maintained at a managing entity site, providing the network manager with a centralized, quick-to-query database regarding current network status is considered as false

Explanation:

The management information system is a formal description set of network objects that is managed by using the Simple Network management protocol.

The performance of network is measured based on the delay throughput and packet loss. There are management information system for more related entities that are managed by the companies.

6 0

3 years ago

WILL GIVE BRAINIEST TO CORRECT ANSWER

Illusion [34]

Answer:

Hey mate, here's ur answer

-------------------------------------------------------------

Loudness refers to how a sound seems to a listener, whether it's loud or soft.

___________________________

Intensity  is the sound power per unit area. It is independent of the sensitivity of the human ears.

___________________________

The loudness of a sound relates the intensity of any given sound to the intensity at the threshold of hearing. It is measured in decibels (dB).

___________________________

Hope this helps

#stayhomestaysafemate

:D

5 0

4 years ago