Answer:
The gravitational potential energy it had from being above the ground is converted to kinetic energy as the rock falls. As kinetic energy increases, the velocity of the rock will also increase. However, if one considers the air, the rock will lose energy as it falls due to air resistance. If the cliff is high enough, the acceleration due to gravity and the air resistance due to the velocity will be exactly equal and there will be no change in kinetic energy.
Explanation:
hope this helps
Answer: The molar mass of this gas is 221 g/mol
Explanation:
The relation between density and molar mass is :
where P = pressure of gas = 1 atm (at STP)
M = molar mass of gas = 32 g/mol
d = density of gas = ?
R = gas constant = 
T= temperature of gas = 273 K ( at STP)
Thus the molar mass of this gas is 221 g/mol
Answer:
(a) Ka = \frac{(SO3)^{2} }{(S)^{2}*(O2)^{3} }
(b) Kb = \frac{(SO2)^{1} }{(S)^{1} *(O2)^{1} }
Explanation:
Correct equation: 2S(s) + 3O_{2}(g) ⇒ 2SO_{3}(g)\\
S(s) + O_{2}(g) ⇒ 2SO_{2}(g)\\
Equilibrium constant refers to a relation between products and reactants of an equilibrium reaction with respect to the components concentration and coefficients.
generally in an equilibrium reaction between reactant A, B, C and D shown below
aA+bB ⇒ cC + dD
the equilibrium constant is represented by
k = \frac{C^{c} *D^{d} }{A^{a} *B^{b} }
comparing this with the equation in the problem the equilibrium constants ka and kb are;
Ka = \frac{(SO3)^{2} }{(S)^{2}*(O2)^{3} }
Kb = \frac{(SO2)^{1} }{(S)^{1} *(O2)^{1} }
Answer:
Option (A)
Explanation:
Radioactivity is defined as a process in which an unstable atomic nucleus decays continuously and after a specific period of time changes into a much more stable element. During this time of decay, the nucleus emits charged particles (energy) which are known as the α, β and γ particles. These are often emitted in the form of electromagnetic energy and are very dangerous to health.
The radioactive elements decay at a certain rate which is commonly known as the half-life. Half-life is basically defined as the time required by a radioactive substance to decay half of its initial composition.
Thus, the correct answer is option (A).
