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RUDIKE [14]
3 years ago
15

Statements about isotopes

Physics
1 answer:
Iteru [2.4K]3 years ago
8 0

Answer:

Key Takeaways: Isotopes

Isotopes are samples of an element with different numbers of neutrons in their atoms.

The number of protons for different isotopes of an element does not change.

Not all isotopes are radioactive. Stable isotopes either never decay or else decay very slowly. ...

When an isotope decays, the starting material is the parent isotope.

Explanation:

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Why is water considered to be a complex compound?
Anvisha [2.4K]

Answer:

Explanation: The elements cannot be separated by physical means. Water is a compound having two hydrogen atoms and one oxygen atom per molecule.

7 0
3 years ago
State Graham's law and state in which sector it falls​
boyakko [2]

Answer:

states that the rate of diffusion of gases is inversely proportional to their square roots

5 0
2 years ago
Read 2 more answers
incline plane is given length 12m,load 600 newton,effort 200 Newton, Height 3 metre find its velocity ratio and mechanical advan
Salsk061 [2.6K]

Answer:

i. The velocity ratio of the plane is 4.

ii. The mechanical advantage of the plane is 3.

Explanation:

i. The velocity ratio (VR) of an inclined plane is ratio of its length to the height. It is given as;

VR = \frac{length of the plane}{height} = \frac{l}{h}

Given: l = 12 m, L = 600 N, E = 200 N, h = 3 m.

So that,

VR = \frac{12}{3}

     = 4

The velocity ratio of the plane is 4.

ii. Mechanical advantage (MA) expresses the relationship between the load overcome to effort applied.

MA = \frac{Load}{Effort} = \frac{L}{E}

      = \frac{600}{200}

      = 3

The mechanical advantage of the plane is 3.

Therefore, the velocity ratio of the inclined plane is 4, and its mechanical advantage is 3.

7 0
3 years ago
An open bed truck is moving at 20 m/s and comes to a stop. A 100 kg crate sitting in the back of the truck remains at rest in th
zzz [600]

The work done was done by friction to keep the crate from moving as the truck came to a stop is 20,000 J.

<h3>Work done by friction to prevent the crate from moving</h3>

The work done is determined by applying the principle of conservation of energy.

W = K.E

W = ¹/₂mv²

where;

  • m is mass of crate
  • v is speed of the crate with respect to the truck = 20 m/s

W = ¹/₂(100)(20²)

W = 20,000 J

Thus, the work done was done by friction to keep the crate from moving as the truck came to a stop is 20,000 J.

Learn more about work done here: brainly.com/question/8119756

#SPJ1

3 0
2 years ago
Consider an object sliding at constant velocity along a frictionless surface. Which of the following best describes the forces o
Aliun [14]
-- The net vertical force on the object is zero.
Otherwise it would be accelerating up or down.

-- The net horizontal force on the object is zero.
Otherwise it would be accelerating horizontally,
that is, its 'velocity' would not be constant.  That
would contradict information given in the question.

The total net force on the object is the resultant of the
net vertical component and net horizontal component.

Total net force =  √(0² + 0²)

                         =  √(0 + 0)

                         =  √0

                         =  Zero.

The correct answer is the last choice on the list.

Also, you know what ! ?  It doesn't even matter whether the surface it's
sliding on is frictionless or not. 

If the object's velocity is constant, then the NET force on it must be zero. 
If it's sliding on sandpaper, then something must be pushing it with constant
force, to balance the friction force, and make the net force zero.  If the total
net force isn't zero, then the object would have to be accelerating ... either
its speed, or its direction, or both, would have to be changing.
3 0
3 years ago
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