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frez [133]
4 years ago
6

Why is density and the melting point both substances of mass

Physics
1 answer:
maw [93]4 years ago
3 0
Density is mass over volume. Density is also a charecteristic property wich defines a substance and two different substance cant have the same charasteristic property.
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The efforts of one good worker can often motivate others to reach their potential through a process called A. Modeling B. Mentor
olganol [36]
It would be A. Modeling.
4 0
3 years ago
Read 2 more answers
What are the four main reasons as to why, despite having an abundance of minerals and natural resources, Pakistan has been unabl
Andre45 [30]

Answer:

GDP growth rate is low

Political instability

Lack of technical skills due to low literacy rate

Pressure from neighboring countries

Explanation:

Gross Domestic Product growth rate of Pakistan is much lower than many developed countries. The GDP growth rate for Pakistan is nearly 5% which is not even stable and it variate from plans. Due to which Pakistan is unable to use its available resources to the fullest. Also one of major issue is political instability in the country. After the loss of great leader Quaid e Azam Pakistan has not faced any loyal leader till date.

Noise pollution, health issues, lack of provision of basic necessities to many are few other factors which give rise to poor law and order situation in the country. Lack of availability of heavy machinery and poor infrastructure has contributed to the country decline. There is abundance of natural resources in the country but due to these issues the country is unable to deal with the challenges.

The pressures from neighboring countries have made the situation even worst. The heavy loan burden is restricting the country from development. The covenants imposed by the lenders have limited the country's ability to use its natural resources and become stable.

5 0
3 years ago
The transfer of energy from objects with higher temperatures to objects with lower temperatures is defined as which of the follo
nikklg [1K]
I think the correct answer form the choices listed above is option C. <span>The transfer of energy from objects with higher temperatures to objects with lower temperatures is defined as gradient transfer. If there are difference in temperature from one point and another point, then a gradient is present and heat transfer will surely happen.</span>
6 0
3 years ago
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The atomic radii of Li+and O2−ions are 0.068 and 0.140 nm, respectively.(a) Calculate the force of attraction between these two
sasho [114]

Answer:

Part a)

F_{attraction} = 1.06 \times 10^{-8} N

Part b)

F_{repulsion} = 1.06 \times 10^{-8} N

Explanation:

Part a)

Equilibrium distance is the distance between two centers when two ions just touch each other

So here we will have

r = 0.068 nm + 0.140 nm

r = 0.208 nm

Now Force of attraction between two ions is given by Coulomb's law

F = \frac{kq_1q_2}{r^2}

F = \frac{(9\times 10^9)(1.6 \times 10^{-19})(2\times 1.6 \times 10^{-19})}{(0.208\times 10^{-9})^2}

F_{attraction} = 1.06 \times 10^{-8} N

Part b)

At equilibrium separation net force between two ions must be zero

F_{attraction} = F_{repulsion}

so the attraction force and repulsion force must be of equal magnitude

so we have

F_{repulsion} = 1.06 \times 10^{-8} N

6 0
3 years ago
A resistor and an ideal inductor are connected in series to an ideal battery having a constant terminal voltage V 0. (a) At the
dybincka [34]

Answer:

the voltage across the resistor is V= 0

Explanation:

The correct answer is zero.

The answer is zero because the inductor acts as open circuit.

i= i_0[1-e^{-\frac{t}{\tau} }]

i_o= maximum current

\tau= L/R=  time constant

i= current at any instant

V= V_0[1-e^{-\frac{t}{\tau} }]

at t=0  at the moment when contact is made

V=V_o[1-1]

⇒V= 0 V

3 0
3 years ago
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