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4 years ago

What does earths system include

1 answer:

3 0

The earths system includes the atmosphere, which contains all of the planet's air. These spheres are closely connected. For example, many bird (biosphere) fly through the air (atmosphere), while water (hydrosphere) often flows through the soil (lithosphere).
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3. An airplane travels at a speed of 600 km/h. How much time will it take to fly a distance of 3180 km to California

____ [38]

Answer:

5.3 hours

Explanation:

(3180 km) / (600 km/h) = 5.3 hours

4 0

3 years ago

A boy carries a 50 N box up a flight of stairs 10-m high. How much potential energy has the box gained?

almond37 [142]

Answer:

Potential energy, P = 500 J

Explanation:

We have,

Weight of the box, W = 50 N

Height of the stairs, h = 10 m

It is required to find the potential energy gained by the box. The potential energy is possessed by an object due to its height. The formula of potential energy is given by :

$P=mgh$

g is acceleration due to gravity

$P=50\ N\times 10\ m\\\\P=500\ J$

So, the potential energy of 500 J is gained by the box.

3 0

3 years ago

The statement that no two electrons in the same atom can have the same four quantum numbers is a restatement of

andreev551 [17]

Answer:

Pauli exclusion principle

Explanation:

Pauli's exclusion principle speaks to the quantum numbers assigned to an electron to describe it's general position and movement. Two electrons can occupy the same energy level (which is described by the first quantum number-the principal quantum number), the orbital angular momentum quantum number (represented by the second number) and magnetic quantum number. electrons that have the same value for all three numbers will have different spins. one will have positive a half while the other has negative a half. Therefore they will never have the same complement of quantum numbers

6 0

3 years ago

A diffraction grating has 300 lines per mm. If light of wavelength 630 nm is sent through this grating, what is the highest orde

True [87]

Answer:

The order of maximum is $n = 5$

Explanation:

From the question we are told that

The diffraction grating is k = 300 lines per mm = 300000 lines per m

The wavelength is $\lambda = 630 \ nm = 630 *10^{-9} \ m$

Generally the condition for constructive interference is mathematically represented as

$dsin \theta = n * \lambda$

Here n is the order maximum

d is the distance the grating which is mathematically represented as

$d = \frac{1}{k}$

=> $d = \frac{1}{300000}$

=> $d = 3.3*10^{-6}\ m$

$n = \frac{dsin \theta}{ \lambda}$

at maximum $sin\theta = 1$

$n = \frac{d}{\lambda}$

=> $n = \frac{3.3*10^{-6}}{630 *10^{-9}}$

=> $n = 5$

8 0

3 years ago

Two trains leave the station at the same time, one heading east and the other west. the eastbound train travels at 85 miles per

kakasveta [241]

<span>Since the trains area headed in completely opposite directions, the rate at which they gain distance from each other is simply equal to the sum of the magnitudes of their velocities, in this case 85 + 75 = 160 miles per hour. Therefore, the amount of time it will take for them to be 352 miles apart is 352/160 = 2.2 hours, or 2 hours and 12 minutes.</span>

3 0

3 years ago