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3 years ago

What are the different isotopes

Physics

1 answer:

Norma-Jean [14]3 years ago

6 0

Answer:

Isotopes can both be the same element but have a different number of electrons

Explanation: not sure if more was supposed to be there, but i tried

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Two equal mass carts approach each other with velocities equal in magnitude but opposite in direction. Friction can be neglected

Viefleur [7K]

Answer:

Explanation:

Since momentum is given by:

$\vec{p}=m.\vec{v}$

Therefore momentum is a vector quantity in the direction of velocity.

Inelastic collision is the type of collision in which the masses combine after collision and start moving in the direction of the greater momentum but here in this case we have the momentum equal and opposite in direction.

<u>This case can be described mathematically as:</u>

$m_1.\vec{v_1}=m_2.\vec{v_2}$

since the mass and velocity are equal:

$m.\vec{v}=m.\vec{v}$

net momentum:

$p_{net}=0$

7 0

3 years ago

A mass of 0.1 kg of helium fills a 0.2 m3 rigid tank at 350 kPa. The vessel is heated until the pressure is 700 kPa. Calculate t

QveST [7]

Explanation:

(a) First, we will calculate the number of moles as follows.

No. of moles = $\frac{\text{mass}}{\text{molar mass}}$

Molar mass of helium is 4 g/mol and mass is given as 0.1 kg or 100 g (as 1 kg = 1000 g).

Putting the given values into the above formula as follows.

No. of moles = $\frac{\text{mass}}{\text{molar mass}}$

= $\frac{\text{100 g}}{4 g/mol}$

= 25 mol

According to the ideal gas equation,

PV = nRT

or, $(P_{2} - P_{1})V = nR (T_{2} - T_{1})$

$(6.90 atm - 3.45 atm) \times 200 L = 25 \times 0.0821 L atm/mol K \Delta T$

$\Delta T$ = 336.17 K

Hence, temperature change will be 336.17 K.

(b) The total amount of heat required for this process will be calculated as follows.

q = $mC \Delta T$

= $100 g \times 5.193 J/g K \times 336.17 K$

= 174573.081 J/K

or, = 174.57 kJ/K (as 1 kJ = 1000 J)

Therefore, the amount of total heat required is 174.57 kJ/K.

3 0

2 years ago

What does the geology of the two continents indicate about past events in Earth history?

Nikolay [14]

Answer:

Explanation:

Rocks tell us a great deal about the Earth's history. Igneous rocks tell of past volcanic episodes and can also be used to age-date certain periods in the past. Sedimentary rocks often record past depositional environments (e.g deep ocean, shallow shelf, fluvial) and usually contain the most fossils from past ages.

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3 years ago

Under which of the following conditions is Lactic acid fermentation most likely occur?

adell [148]

Lactic acid is caused by using atp without oxygen being avaliable

5 0

3 years ago

Which is heavier, humid air or dry air ?

zvonat [6]

Answer:

dry air is way heaver

Explanation:

5 0

3 years ago