How far can light travel in one year?

Help ! Velocity............

Murrr4er [49]

Answer:

70.7m/s

Explanation:

V = ( v + u)

_____

2

V = average velocity

v = final velocity

u = initial velocity

velocity = distance

______

time

u (initial velocity) = 33 ÷ 2

change mins to seconds

1 min = 60 secs

2 mins = ?

cross multiply

60 × 2 = 120 secs

u = 33 ÷ 120

u = 0.275m/s

v ( final velocity) = 29 ÷ 1.3

change mins to secs

1 min = 60 secs

1.3 mins = ?

cross multiply

1.3 × 60 = 78 secs

v = 29 ÷ 78

v = 0.371 m/s

V = ( v + u )

_____

2

V = ( 0.371 + 0.275)

____________

2

V = 0.51 m/s

5 0

3 years ago

What type of circuit is illustrated

Varvara68 [4.7K]

The bulbs are in parallel.

The picture doesn't show enough of the circuit to tell
whether it's also open or shorted. It may be either, or
it may be neither.

4 0

3 years ago

Hydroelectric dams use ------- to produce electricity. gravitational potential energy of falling water

Eduardwww [97]

Answer:

Gravitational potential energy

Explanation:

Hydroelectric dams are the power plants which generates electricity by using the energy of falling water from a great height.

A the water is stored in big reservoirs and at a great height, it contain lot of potential energy due to the height. As it falls downwards, the potential energy is converted into kinetic energy of the water. this kinetic energy of the falling water is used to run the turbine, and then the electric energy is generated.

So, in hydroelectric power stations, the potential energy of water is converted into the electric energy.

7 0

3 years ago

The compressed-air tank ab has a 250-mm outside diameter and an 8-mm wall thickness. it is fitted with a collar by which a 40-kn

valentinak56 [21]

Assume: neglect of the collar dimensions. Ď_h=(P*r)/t=(5*125)/8=78.125 MPa ,Ď_a=Ď_h/2=39 MPa Ď„=(S*Q)/(I*b)=(40*ă€–10ă€—^3*Ď€(ă€–0.125ă€—^2-ă€–0.117ă€—^2 )*121*ă€–10ă€—^(-3))/(Ď€/2 (ă€–0.125ă€—^4-ă€–0.117ă€—^4 )*8*ă€–10ă€—^(-3) )=41.277 MPa @ Point K: Ď_z=(+M*c)/I=(40*0.6*121*ă€–10ă€—^(-3))/(8.914*ă€–10ă€—^(-5) )=32.6 MPa Using Mohr Circle: Ď_max=(Ď_h+Ď_a)/2+âš(Ď„^2+((Ď_h-Ď_a)/2)^2 ) Ď_max=104.2 MPa, Ď„_max=45.62 MPa

3 0

4 years ago

Match the layer of Earth with its characteristic.

mote1985 [20]

Answer:

Explanation:

The Asthenosphere -- drives the movement in the plates

It is a weak and flexible part of the upper mantle of the planet Earth.

It is located below the lithosphere. The depth of it is between 200 and 80 kilometers below the surface. It is usually solid but in some regions it is fluid. The temperature dictates the thickness of the Asthenosphere.

The Core -- the hottest layer of the Earth.

The inner Core of the Earth is a layer that's located in the core of it. By definition, it is a rock-hard ball that has the radius of 1,220 kilometers, making it 20% of the Earth's radius and 70% of the Moon's radius. The samples are not discovered. It is believed that it has the composition of iron-nickel infusion along with other elements. The temperature is appx. 5430 °C, which is similar to the temperature of the surface of the Sun.

Mesosphere -- contains the lower mantle

By definition, it comes from the Greek word mesos, which means '' middle ''.

It is the third layer of the Earth. It is located above the stratosphere and below the thermosphere. The higher the altitude, the lower the temperature. It ends in the coldest part of the Earth, Mesopause. And it begins at the Stratosphere.

Lithosphere -- contains the tectonic plates

By the definition, it is also a word that came from the Greek language. It comes from the word '' lithos '' which means '' rocky ''.

It is a hard, outer part of the Earth.

On the planet Earth, it is made out of the crust of the upper mantle. The rocks from the Lithosphere are elastic.

They are two types of Lithosphere -- the oceanic Lithosphere and Continental Lithosphere.

6 0

4 years ago

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