Answers
Answer:
15 m/s
Explanation:
We know that where f = frequency & d = wavelength .
So here.
Wavelength = 5 m
Frequency = 3 s⁻¹
Hence Speed = 5 * 3 = 15 m/s
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What is the wavelength of the photons emitted by hydrogen atoms when they undergo n =5 to n =3 transitions?
Answers
Answer:
150 hope this helps
Explanation:
Answer:
150
Explanation:
Answers
Hope This Helps!
Answers
Answer:
0.144 kg of water
Explanation:
From Raoult's law,
Mole fraction of solvent = vapor pressure of solution ÷ vapor pressure of solvent = 423 mmHg ÷ 528.8 mmHg = 0.8
Let the moles of solvent (water) be y
Moles of solute (C3H8O3) = 2 mole
Total moles of solution = moles of solvent + moles of solute = (y + 2) mol
Mole fraction of solvent = moles of solvent/total moles of solution
0.8 = y/(y + 2)
y = 0.8(y + 2)
y = 0.8y + 1.6
y - 0.8y = 1.6
0.2y = 1.6
y = 1.6/0.2 = 8
Moles of solvent (water) = 8 mol
Mass of water = moles of water × MW = 8 mol × 18 g/mol = 144 g = 144/1000 = 0.144 kg
Answers
From a mathematical point of view, the Schrödinger Equation is a LINEAR partial differential equation, as is a partial differential equation that is defined by a linear polynomial in the solution and its derivatives.
For a linear differential equation, if you got two different solutions and
, then the linear combination
, where
and
are scalars, is also a solution.
This also is valid for only one solution (think of the other solution as equal to zero, ). So, as the Schrödinger Equation is a Linear partial differential equation, then if
is a solution, then
must also be a solution.
This is extremely important for physicist, as let us know that the superposition principle is valid.
Velocity vs. Time
1400
1300
1200
1100
1000
4 45
3
1 (s)
At what point is the car the fastest?
A. t = 1.0 s
B. t = 4.2 s
C. t = 3.0 s
D. t = 4.5 s
Answers
From the graph, it is clear that, the velocity is at a time of 1 s is highest. The velocity at 1 second corresponds to 1250 km/hr. Then it decreases with time.
What is velocity - time graph ?
The velocity - time graph shows the change in velocity with respect to time. The velocity is placed in y -axis and time is given in x - axis. The slope of the curve in velocity - time graph gives the acceleration of the object.
Similarly, the position of the object in meter after a t seconds can be determined from the velocity - time graph. It is the rate of change in velocity of the object.
From the graph, it is clear that, the curve has its peak at 1 second. After that the peak descends down. Hence, the maximum velocity of the car is at a time of 1 second at which the velocity is 1250 km/hr.
Find more on velocity - time graph :
#SPJ7
Answers
Answer:.
Required velocity = 6.26ms^-1
Explanation:
Given,
Distance, s = 450m
Time, t = 2 sec
Step 1. We obtain the distance covered within the given time under gravitational acceleration, g = 9.8ms^-2
S = ut + (1/2)gt^2. :; u = 0
: S = (1/2)gt^2
=(1/2) (9.8)(2^2)
= 19.6m
Step 2 :
We obtain the velocity using the formula.
V^2 = u^2 + 2gs.
Where u is initial velocity, v is final/ required velocity
Again u = 0
: V^2 = 2 (9.8)(19.6)
= 39.2
: V = 6.26ms^-1