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Jlenok [28]
2 years ago
6

The rate at which work is done is called

Physics
1 answer:
Vilka [71]2 years ago
4 0

Answer:

The rate at which work is done is power

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In longitudinal waves the places where the coils are bunched together are called *
Firdavs [7]
In longitudinal waves the places where the coils are bunched together are called *
Compressions
3 0
3 years ago
I
Anna [14]

Answer:

Here, m=10 kg

The resultant force acting on the body is

F=(98N)2+(6N)2=10N

Let the resultant force F makes an angle θ w.r.t. 8N force.

From figure, tanθ=8N6N=43

The resultant acceleration of the body is 

a=mF=10kg10N=1ms−2

The resulatnt acceleration is along the direction of the resulatnt force.

Hence, the resultant acceleration of the body is 1 ms−2 at an angle of tan−1(43) w.r.t. 8N force.



3 0
1 year ago
Mention 4 physical quantities which are dimension less​
aleksklad [387]

Answer:In dimensional analysis, a dimensionless quantity (or more precisely, a quantity with the dimensions of 1) is a quantity without any physical units and thus a pure number. Such a number is typically defined as a product or ratio of quantities which do have units, in such a way that all the units cancel out.

Explanation:

5 0
3 years ago
Match each scientist with the contribution he made to the arrangement of elements in the periodic table
Sergeeva-Olga [200]
  • Dmitri Mendeleev- arranged elements according to their

atomic mass

  • Johann Wolfgang Dobereiner-created groups of three elements,

each based on similar properties

  • John Newlands-used patterns to predict undiscovered

elements

  • Antoine Lavoisier-divided elements into four categories

Explanation:

The periodic table or the table depicting the arrangement of various elements has a long history. Several of the scientist starting from Lavoisier to Mendeleev contributed to the table in their might. The present table has been an evolution of the previous tables over their shortcomings.

Some of the notable contributions include-

  • Mendeleev- Mendeleev arranged the elements in order of atomic mass rather than atomic mass. Through this, he also discovered new elements.
  • Newlands- He formulated the Newland law of octaves similar to musical notation.
  • Lavoisier- Lavoisier divided the elements into various categories and also defined elements.
  • Dobereiner- He formulated the triad law which encapsulated that certain group of elements showed similar properties, hence can be grouped together.

6 0
2 years ago
Read 2 more answers
Let k be the Boltzmann constant. If the configuration of the molecules in a gas changes so that the multiplicity is reduced to o
katen-ka-za [31]

Answer:

ΔS =  - k ln (3)

Explanation:

Using the Boltzmann's expression of entropy, we have;

S = k ln Ω

Where;

S = Entropy

Ω = Multiplicity

From the question, the configuration of the molecules in a gas changes so that the multiplicity is reduced to one-third its previous value. This also causes a change in the entropy of the gas as follows;

ΔS = k ln (ΔΩ)

ΔS = kln(Ω₂)  - kln(Ω₁)

ΔS = kln(Ω₂ / Ω₁)              -------------(i)

Where;

Ω₂ = Final/Current value of the multiplicity

Ω₁ = Initial/Previous value of the multiplicity

Ω₂ = \frac{1}{3} Ω₁         [since the multiplicity is reduced to one-third of the previous value]

Substitute these values into equation (i) as follows;

ΔS = k ln (\frac{1}{3} Ω₁ / Ω₁)

ΔS = k ln (\frac{1}{3})

ΔS = k ln (3⁻¹)

ΔS =  - k ln (3)

Therefore, the entropy changes by - k ln (3)

4 0
3 years ago
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