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3 years ago

What are the two main gasses found in the cloud the sun formed from?

1 answer:

6 0

The Sun is a huge, glowing sphere of hot gas. Most of this gas is hydrogen (about 70%) and helium (about 28%). Carbon, nitrogen and oxygen make up 1.5% and the other 0.5% is made up of small amounts of many other elements such as neon, iron, silicon, magnesium and sulfur.

So typically I would say hydrogen and helium.

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What is work?(theoretically)

emmasim [6.3K]

Answer:

force×distance

Explanation:

work is the ability of an object to move a distance as a result of the force being applied

4 0

3 years ago

A railroad car having a mass of 17.5 Mg is coasting at 1.5 m/s on a horizontal track. At the same time another car having a mass

Leokris [45]

Answer:

Then final velocity of the coupled system of cars will be 0.58 m/s

Explanation: Let us consider the car-1 is moving towards right (say + ve direction) and car-2 is moving towards left (say in - ve direction), accordingly velocity are considered +ve and -ve.

$m_{1} = 17.5 \ Mg = 17.5 \times 10^{6} \ g = 17.5 \times 10^{3} \ Kg = 17500 \ Kg$

$v_{1} = + \ 1.5 \ m/s$

$m_{2} = 12 \ Mg = 12 \times 10^{6} \ g = 12 \times 10^{3} \ Kg = 12000 \ Kg$

$v_{2} = - \ 0.75 \ m/s$

Applying the conservation of momentum, and let the final velocity of combined system is V m/s

$m_{1} \times v_{1} + m_{2} \times v_{2} = (m_{1} + m_{2}) \times V$

$17500 \times 1.5 \ + 12000 \times (-0.75) = 29500 \times V$

26250 - 9000 = 29500 $\times$ V

V = $\frac{17250}{29500}$ = 0.58 m/s

Then final velocity of the coupled system of cars will be 0.58 m/s

8 0

3 years ago

Read 2 more answers

Help please 10 pts and quick!

sweet [91]

Answer:

Explanation:

8 0

3 years ago

A stone is dropped from the top of a cliff which is 10-m high. What is its velocity when it hits the ground? Sketch the stones p

kodGreya [7K]

S = displacement

V = final velocity

U = initial velocity

3 0

3 years ago

A new ride being built at an amusement park includes a vertical drop of 71.6 meters. Starting from rest the ride vertically drop

AnnyKZ [126]

Answer:

We can conclude 2.3x10^7 J was converted to thermal energy

Explanation:

<u>Energy Conservation </u>

According to the law of conservation of energy, the total energy of an isolated system must be constant. If some kind of energy is 'lost', we know it was transformed into another type.

Let's check the conditions of the problem. The ride vertically drops a distance of 71.6 m starting from rest, and at the bottom of the drop, its speed is 10 m/s. Knowing the mass of the cart plus passengers is 3.5X10^4 kg, we compute the total energy at the top of the drop.

$E=U+K$

Where E is the total energy (which must be conserved) at the top of the drop, U is the gravitational potential energy and K is the kinetic energy. We use the equations for each:

$U=m.g.h$

$\displaystyle K=\frac{mv^2}{2}$

$\displaystyle E=m.g.h+\frac{mv^2}{2}$

At the top, the speed is 0, thus

$\displaystyle E=m.g.h=(35000)(9.8)(71.6)=2.5X10^7\ J$

Now we compute the 'total' energy at the bottom (quoted because we know there is some mechanical energy loss in the drop)

$\displaystyle E'=m.g.h'+\frac{mv'^2}{2}$

This time h'=0 and v=10 m/s, thus

$\displaystyle E'=\frac{(35000)10^2}{2}=1.8x10^6\ J$

The mechanical energy at the top and the bottom are not the same, thus we can know part of it was converted to heat or thermal energy. We compute the difference

$2.5x10^7\ J-1.8x10^6\ J=2.3x10^7\ J$

We can conclude 2.3x10^7 J was converted to thermal energy

4 0

3 years ago