from the molecular formula of CH₄ , we see that
one molecule of CH₄ contains 1 atom of carbon and 4 atoms of hydrogen .
in the same way , if we have 1 mole of CH₄ , it will contain 1 mole of carbon and 4 moles of hydrogen
similarly , if we have 5 moles of CH₄ , it will contain 5 x 1 mole of carbon and 4 x 5 moles of hydrogen
so in 5 moles of CH₄ , we have 5 moles of carbon
Answer:
BC
Explanation:
A) In a uniform field , dipole can remain in rotational equilibrium as well as linear equilibrium . So statement is wrong.
A dipole whose moment vector is not aligned with a uniform electric field will twist around toward being aligned. Moment vector is aligned along the axis of the dipole. In this position torque acting on the dipole is zero so it is in rotational equilibrium.
On the dipole only torque acts and no net force acts in case of uniform electric field. In case of non uniform magnetic field, both torque and force exists. each pole experiences electric force of equal magnitude.
<h2>
Initial velocity of the object = 31.4 m/s</h2>
Explanation:
If an object is thrown downward with an initial velocity of v₀, then the distance it travels is given by s = 4.9 t²+v₀t
Now an object is thrown downward from a cliff 400 m high and it travels 138.3 m in 3 sec. We need to find initial velocity of the object.
s = 4.9 t²+v₀t
138.3 = 4.9 x 3²+ v₀ x 3
3v₀ = 94.2
v₀ = 31.4 m/s
Initial velocity of the object = 31.4 m/s
Answer:
(a) Option B
The magnitude of the buoyancy force is equal to that of the ball's weight.
(b) Option B
The magnitude of the buoyancy force is larger than that of the ball's weight.
(c) Option B
They both have the same buoyancy force.
Explanation:
(a)
Ball 1
The sum of vertical forces is zero hence therefore
B-mg=0 where B is buoyancy force, m is mass of ball, g is acceleration due to gravity
B=mg
mg is weight of ball
Therefore, option B, The magnitude of the buoyancy force is equal to that of the ball's weight
(b)
Ball 2
The sum of vertical forces is zero hence therefore
B-T-mg=0 where B is buoyancy force, m is mass of ball, g is acceleration due to gravity and T is tension in the string
B=mg+T
Therefore, option B, The magnitude of the buoyancy force is larger than that of the ball's weight.
(c
)
Ball 2 and 3
They have similar buoyancy force since the weight displaced by the body equals the buoyancy force. In this case, the weight of the displaced fluid is proportional to the volume of the ball since the two balls have same volume. It therefore means that their buoyancy forces are also the same.
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