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vesna_86 [32]
4 years ago
10

Whats is physical energy

Physics
2 answers:
vampirchik [111]4 years ago
7 0
Is related to interfere on raw physical matter (Masses and Bodies)
Sophie [7]4 years ago
6 0

Physical energy is raw physical matter that you can feel and touch physically for example ice and water  

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An ordinary workshop grindstone has a radius of 7.50 cm and rotates at 6500 rev/min. (a) Calculate the magnitude of the centripe
jonny [76]

To solve this problem it is necessary to apply the concepts related to the relationship between tangential velocity and centripetal velocity, as well as the kinematic equations of angular motion. By definition we know that the direction of centripetal acceleration is perpendicular to the direction of tangential velocity, therefore:

a_c= \frac{v^2}{r}=r\omega^2

Where,

V = the linear speed

r = Radius

\omega = Angular speed

The angular speed is given by

\omega =6500\frac{rev}{min}(\frac{2\pi rad}{1 rev})(\frac{1 min}{60s})

\omega = 680.6784 rad/s.

Replacing at our first equation we have that the centripetal acceleration would be

a_c = r\omega^2

a_c = (0.0750)(680.6784)^2

a_c = 34 749.23 m/s^2

To transform it into multiples of the earth's gravity which is given as 9.8m / s the equivalent of 1g.

a_c =34749.23 \frac{m}{s^2} (1\frac{g}{9.8m/s^2})

a_c = 3545.84g

PART B) Now the linear speed would be subject to:

v = \omega r

v= (680.6784)(0.0750)

v=51.05 m/s

Therefore the linear speed of a point on its edge is 51.05m/s

8 0
3 years ago
[OU.04]What type of galaxy is described as having a circular shape with most of the objects concentrated around its center? spir
GalinKa [24]

Answer:

spiral

Explanation:

A galaxy may be defined as the huge collection of celestial bodies like the stars, planets, dark matters, dust and gases and the solar systems. It is derived from the Greek work, 'Galaxias' , which means "milky". There are many types of galaxies. They are : Spiral galaxy, Elliptical galaxy, Irregular galaxy and Barred spiral galaxy.

A spiral galaxy is one which contains a sphere shaped bulge which consists of old stars and it is devoid of dust and gas. Its circular shape composes a disk. It is of circular shape having most of the objects concentrated in its center.

5 0
3 years ago
Read 2 more answers
Hello please help i’ll give brainliest
AlekseyPX

Answer:

Oceanic crust moves easly. Continental crust does not move

8 0
3 years ago
Which of the following statements are true? Check all that apply. A.Earth's geographic south pole is also a magnetic south pole.
ycow [4]

Answer:

C.The north pole of a bar magnet will attract the south pole of another bar magnet.

D.The south poles of two bar magnets will repel each other.

F.Earth's geographic north pole is actually a magnetic south pole.

Explanation:

The magnetic field is a region of space that exerts a force on charged particles in motion or on magnets.

A magnet is an object that produces a magnetic field in the region around it - a magnet always consists of a north pole and of a south pole; it is not possible to create a magnetic monopole: if a magnet is cut in a half, we end up with two new magnets, each of them having its own north and south pole.

The lines showing the direction of the magnetic field always go from the north pole towards the south pole.

When a magnet is placed near another magnet, the two magnets can attract/repel each other. In particular:

- Same poles (north-north and south-south) repel each other

- Opposite poles (north-south) attract each other

Moreover, the Earth has also a magnetic field, and its axis acts as a huge magnet. The location of the magnetic North pole corresponds to the location of the geographic South pole, and vice-versa.

According to what we said so far, the correct statements are:

C.The north pole of a bar magnet will attract the south pole of another bar magnet.

D.The south poles of two bar magnets will repel each other.

F.Earth's geographic north pole is actually a magnetic south pole.

4 0
4 years ago
As a science project, you drop a watermelon off the top of the Empire State Building, 320 m above the sidewalk. It so happens th
MA_775_DIABLO [31]

Answer:

Watermelon is going at a speed of 13.33\ \rm m/s in downward direction

Explanation:

Given

  • Height of the Empire State building = 320 m
  • Speed of the superman = 24 m/s

since both the motion of both  watermelon and the superman is under gravity. The acceleration of both is g in downwards direction. So the relative acceleration between them is zero and when they meet the relative distance covered by them will be the height of the Empire State building.

so let t be the time when they meet given by

\dfrac{320}{24}\\t=13.33\ \rm s

Now let v be the velocity of the the watermelon when they meet given by

v=gt\\v=9.8\times13.33\\v=130.63\ \rm m/s

6 0
3 years ago
Read 2 more answers
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