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4 years ago

What is a meniscus and what does it do

1 answer:

7 0

The meniscus is a piece of cartilage that provides a cushion between your femur (thighbone) and tibia (shinbone). There are two menisci in each knee joint. They can be damaged or torn during activities that put pressure on or rotate the knee joint.

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in an experiment the following readings were observed volume of alcohol flowing per minute equals to 10 raise to power - 5 cube

tekilochka [14]

Answer:

The viscosity is 1.30 x 10^-3 deca poise.

Explanation:

Volume per minute, V = 10^-5 m^3

Volume per second, V = 1.67 x 10^-7 m^3

density, d = 800 kg/m^3

radius, r = 0.05 cm

Length, L = 0.5 m

Height, h = 60 cm

Pressure, P = h d g = 0.6 x 800 x 9.8 = 4704 Pa

Use the formula of rate of flow

$V = \frac{\pi p r^4}{8\eta L}\\\\1.67\times 10^{-7}\times8\times \eta\times 0.5 = 3.14\times 4707\times (0.05\times 10^{-2})^4\\\\\eta = 1.38\times 10^{-3} deca poise$

6 0

3 years ago

sandra lives in a country located in the northern hemisphere she makes a sundial by erecting a pole vertically in her garden the

Arte-miy333 [17]

Answer:

Explanation:

The sun has rotated causing the shadow to reflect.

5 0

3 years ago

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 energy per unit volume in an electromagnetic wave is: ________

Marianna [84]

Answer:

Explanation:

Electromagnetic waves are waves that are generated when an electric field and a magnetic field vibrate together. They are usually created whenever an electric field collides with a magnetic field.

In more generic terms for an electric field, the energy per unit volume is given by:

Energy density = $\dfrac{1}{2}\varepsilon _oE^2$

For magnetic field:

Energy density = $\dfrac{\beta^2}{2 \mu _o}$

∴

For the electromagnetic wave (u):

Total energy density is:

$u = \dfrac{1}{2}\varepsilon_oE^2 + \dfrac{\beta ^2}{2 \mu_o}$

Due to the fact that the energy related with both fields is equivalent:

Then:

E = cB

6 0

3 years ago

20 pts

alexdok [17]

Answer: 2

Explanation:

3 0

3 years ago