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2 years ago

When CO2 rises, temperature rises. Why do you think this is?

Engineering

1 answer:

icang [17]2 years ago

6 0

Answer:

The warming causes the oceans to release CO2. The CO2 amplifies the warming and mixes through the atmosphere, spreading warming throughout the planet. So CO2 causes warming AND rising temperature causes CO2 rise. Overall, about 90% of the global warming occurs after the CO2 increase.

Explanation:

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Am I alive I really need to know?

Nesterboy [21]

Hell no,cause i’m not

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3 years ago

How many 10" diameter circles can be cut from a semicircular shape that has a 20"

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9514 1404 393

Answer:

Explanation:

Only one such circle can be drawn. The diameter of the 10" circle will be a radius of the semicircle. In order for the 10" circle to be wholly contained, the flat side of the semicircle must be tangent to the 10" circle. There is only one position in the figure where that can happen. (see attached).

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2 years ago

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Which of the following would most likely be operated by a sequential control system?

Rudiy27

Answer:pizza oven

Explanation:

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2 years ago

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1. A piston having a diameter of 5.48 inches and a length of 9.50 in slides downward with a velocity, V, through a vertical pipe

const2013 [10]

Answer:

V = 0.00459 ft/s

Explanation:

Since the Piston is moving downwards with a constant velocity V, from the first Newton’s law we know that all vertical forces, must have zero resultant (their sum over vertical axis must equal to zero). Therefore, force that pulls the piston down, is equalized by force of viscous friction Fd= Fvf = 0.5lb (lb here is the pound-force unit). We will relate F ѵ f with τ and from that derive the equation for V.

Fѵf = τ . A

Where τ = µ. du/dy = µ . V/b , and A = π . D . l from this Follows:

Fѵf= (V. A .µ )/b  V= ( Fѵf .b )/(A.µ)

Placing all the known values in the equation ( remember to transform inches to feet, by multiplying inches values with the factor 1/12), we obtain :

ft2

V = ((0.5lb) . (0.002/12 ft))/(π . (5.48/12 ft) . (9.50/12 ft) . (0.016 lb.s/(ft^2 )))

V = 0.00459 ft/s

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3 0

3 years ago

A hair dryer is basically a duct of constant diameter in which a few layers of electric resistors are placed. A small fan pulls

nikitadnepr [17]

Answer:

the percent increase in the velocity of air as it flows through the dryer is 12%

Explanation:

given data

density of air ρ = 1.18 kg/m³

density of air ρ' = 1.05 kg/m³

solution

we know there is only one inlet and exit

ρ × A × v = ρ' × A × v' ........................1

put here value and we get

$\frac{v'}{v} = \frac{\rho }{\rho '}$

$\frac{v'}{v} = \frac{1.18}{1.05}$

$\frac{v'}{v}$ = 1.12

so the percent increase in the velocity of air as it flows through the dryer is 12%

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3 years ago