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3 years ago

15

If the motion of B is uniformly accelerated, at what time will both graphs have

1 answer:

Misha Larkins [42]3 years ago

7 0

Answer:

Im just here for the points man sorry

Explanation:

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A country is deciding what to do about pollution given off by power plants.

ale4655 [162]

Answer:

The correct option is B

B) Scientists can measure how much pollution is given off.

Explanation:

A) To determine what kind of plants do people want, a polling or a survey is carried out. It is not the job of a scientist to carry that out.

B) Scientist have derived various techniques to measure different kinds of pollution. For example, air pollution can be derived from the Air Quality Index, which measure the quality of the air. The higher the value of Air Quality Index, more is the pollution.

C) Scientists are not allowed to pass any laws regarding pollution. Any kind of laws, including those related to pollution are passed by the Congress.

D) Most of the powerplants in US are owned by private business, while some are under control of the government.

5 0

3 years ago

How does occluded humidity, density, and air motive compare to that of high pressure system?

OlgaM077 [116]

It goes through the atmosphere and evaporates

3 0

3 years ago

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A hanging magnesium wire with diameter 2.1 mm (2.1 × 10-3 m) is initially 1.15 m long. When a 104 kg mass is hung from it, the w

Snezhnost [94]

Answer:

The approximate value of the effective spring stiffness of the inter atomic force is 11.32 N/m.

Explanation:

Given that,

Diameter of wire = 2.1 mm

Initial length = 1.15 m

Mass = 104 kg

Stretching length = 8.46 mm

Mass of mole of magnesium =24 g

Density = 1.74 g/cm³

We need to calculate the diameter of magnesium

Using formula of diameter

$d=(\dfrac{V}{N})^{\frac{1}{3}}$

$d=(\dfrac{\dfrac{M}{\rho}}{N})^{\frac{1}{3}}$

Put the value into the value

$d=(\dfrac{\dfrac{24}{1.74}}{6.023\times10^{23}})^{\frac{1}{3}}$

$d=2.83\times10^{-8}\ cm$

We need to calculate the stress

Using formula of stress

$stress=\dfrac{F}{A}$

$stress =\dfrac{104\times9.8}{\pi\times(1.05\times10^{-3})^2}$

$stress =294259805.89\ N/m^2$

$stress =2.94\times10^{8}\ N/m^2$

We need to calculate the strain

Using formula of strain

$strain=\dfrac{\Delta l}{l}$

$strain=\dfrac{8.46}{1.15}$

$strain=7.35$

We need to calculate the young modulus

Using formula of young modulus

$Y=\dfrac{stress}{strain}$

$Y=\dfrac{2.94\times10^{8}}{7.35\times10^{-3}}$

$Y=4\times10^{10}\ N/m^2$

We need to calculate the approximate value of the effective spring stiffness of the inter atomic force

Using formula of effective spring stiffness

$Y=\dfrac{k}{d}$

$k=Y\times d$

Put the value into the formula

$k=4\times10^{10}\times2.83\times10^{-8}\times10^{-2}$

$k=11.32\ N/m$

Hence, The approximate value of the effective spring stiffness of the inter atomic force is 11.32 N/m.

4 0

3 years ago

The amount of force needed to keep a 0.1 kg basketball moving at a constant speed of 6 m/s on frictionless ice is how much N?

FromTheMoon [43]

Mass=m=0.1kg
Acceleration=0(Constant speed)

$\\ \sf\longmapsto F=ma$

$\\ \sf\longmapsto F=0.1(0)$

$\\ \sf\longmapsto F=0N$

3 0

3 years ago

Which of the following statement best describes the laws of conservation mass?

klio [65]

In a chemical reaction, matter is neither created or destroyed.

3 0

3 years ago

Read 2 more answers