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3 years ago

The concentration of atmospheric carbon dioxide is currently decreasing due to human activities. TRUE OR FALSE?. .

2 answers:

8 0

The correct answer is false. The statement is not correct. <span>The concentration of atmospheric carbon dioxide is not currently decreasing due to human activities rather it is increasing due to large amounts of emission to the atmosphere.</span>

Lady bird [3.3K]3 years ago

7 0

False.

The concentration is actually increasing due to human activities.

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Which of the following statements are true?

Likurg_2 [28]

Answer:

Explanation:

(A) True: It is true.

In junction law, the current entering at a junction is equal to teh current leaving at the junction.

(B) False: It is false.

The kirchhoff's junction law is based on the conservation of charge.

Energy is used in the circuit.

(D) True: It is true.

It is based on the conservation of charge.

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3 years ago

How is electromagnetic energy from the microwave transformed into heat energy

8_murik_8 [283]

The energy comes in waves and I forget how, but the waves make the water molecules in teh food spin and that causes friction which warms the food up

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3 years ago

Read 2 more answers

Thermal escape of an atmosphere is most pronounced on worlds where the gravity is low and the temperature is high.

Alona [7]

The answer is false

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4 years ago

When an excited electron in a hydrogen atom falls from the n = 3 to the n = 2 level, a photon of red light is emitted from the a

Kaylis [27]

Answer: 653.33 nm ; 1875, 24 nm

Explanation: For the first case we have to use the Balmer series for the hydrogen when the atom falls from the n = 3 to the n = 2. So for the second transtions for the hydrogen we use the Paschen serie. To do the calculation we need to know the Ryberg constant that is equal to 1.097 * 10^7 m^-1. In the attach is shown the expression for spectral series used for calculation.

3 0

3 years ago

A spring with k = 53 N/m hangs vertically next to a ruler. The end of the spring is next to the 18 cm mark on the ruler. If a 2.

Anarel [89]

Answer:

1.07 m

Explanation:

x = Compression of the spring

k = Spring constant = 53 N/m

Initial length = 18 cm

P = Kinetic energy

K = Kinetic energy

At the lowest point of the mass the energy conservation is as follows

$P_{ig}+P_{is}+K_i=P_{fg}+P_{fs}+K_f\\\Rightarrow mgx+0+0=mgx+\frac{1}{2}kx^2\\\Rightarrow x=\frac{2mg}{k}\\\Rightarrow x=\frac{2\times 2.4\times 9.81}{53}\\\Rightarrow x=0.89\ m$

At its lowest position the mark on the ruler will be

$x_f=0.18+0.89\\\Rightarrow x_f=1.07\ m$

The spring line will end up at 1.07 m

4 0

3 years ago