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3 years ago

1. What are the two main gases responsible for lowering down the pH.

Physics

1 answer:

Lubov Fominskaja [6]3 years ago

5 0

Answer:

1. The three main acidic gases responsible for lowering the pH of rainwater are non-metal oxides produced by the burning of fossil fuels like coal, oil and natural gas. Sulfur dioxide is produced when fossil fuels containing sulfur impurities are burned.

2. A great way to reduce acid rain is to produce energy without using fossil fuels. Instead, people can use renewable energy sources, such as solar and wind power. Renewable energy sources help reduce acid rain because they produce much less pollution.

3. The pH scale is logarithmic, meaning that an increase or decrease of an integer value changes the concentration by a tenfold. For example, a pH of 3 is ten times more acidic than a pH of 4.

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At what altitude h above the north pole is the weight of an object reduced to 67% of its earth-surface value? Assume a spherical

lara31 [8.8K]

Answer:

The answer to the question is

At an altitude of 1413 km or 1.222·R above the north pole the weight of an object reduced to 67% of its earth-surface value

Explanation:

We make use of the gravitational formula as follows

F = G $\frac{m_{1} m_{2} }{R^{2} }$ where

m₁ = mass of the object

m₂ = mass of the earth

d = distance between the two objects and

G = gravitational constant

if at the altitude the weight is reduced to 67 % of its weight on earth then

with all other variables remaining constant, we have

67% F = G $\frac{m_{1} m_{2} }{R_{2} ^{2} }$ =0.67× G× $\frac{m_{1} m_{2} }{R_{1} ^{2} }$

cancelleing like ternss from both sides we have

1/R₂² =0.67/R₁² or r₁²/R₂² =0.67 and R₁/R₂ = 0.8185

or R₂ = R₁/0.8185 or 1.222·R = (6.37×10⁶ m)/0.8185 = 7.783×10⁶ m

Hence at an altitude = 1.413×10⁶ m the weight of the object will reduce to 67% its earth-surface value

6 0

3 years ago

You are holding a block of wood with dimensions 3 cm x 6 cm x 9 cm on the

Ainat [17]

Answer:

The normal force of weight will not differ for different placements but the force of pressure applied to the surface of your hand is per unit area. So the side with the smallest area.. 3 cm x 6 cm will exert the most pressure on your hand.

Please Give Brainliest

3 0

4 years ago

A gas is enclosed in a confainer fitted with a piston of cross sectional area 0.10 the pressureof the gas is maintained in 8000

Arlecino [84]

Answer:

10 Joule

Explanation:

The solution and answer are well written in the Pic above.

6 0

3 years ago

A 50.0-kg skater begins a spin with an angular speed of 4.0 rad/s. By changing the position of her arms, the skater decreases he

Pani-rosa [81]

Answer:

The Skater's final angular speed =8rad/s

Explanation:

Let initial momentum of inertia be I1

Let final momentum of inertia be I2

But I2= I1/2

It is decreased by one-half

There is no external torque on the system, therefore

I1w1=I2w2

I1×4=(I1/2)×w2

Dividing through by I1 on both sides leaves you with:

4=w2/2

Cross multiply

W2=4×2=8rad/s

4 0

4 years ago

Why is it less air pressure up in the sky and why does it affect our ears

IgorLugansk [536]

Answer:

When you in a airplane you are in high altitude and thats where air density drops. Thats where ear pops come from.

Explanation:

8 0

2 years ago