Answer: A... Thermal energy from the ice is transferred to the air.
Explanation: because I just know.
D. Mercury
Its year only takes 88 Earth days.
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Answer:
at n= 3 λ = 656 nm
at n= 2 λ = 121.58 nm
Explanation:
Given details
transition of hydrogen atom from n = 2 to n = 3 state
Difference in energy between n = 3 state and n = 2 state :
so, energy of photon is given as
So solve for wavelength
so, λ
=
= 656 nm
for second transition,
energy transmitted is given asΔE
and it is calculated as
E = 1.635*10-18 J solving for wavelength in ENERGY equation we get
so, m
= 121.58 nm
Answer:
f = 2ππ √g / A
Explanation:
The expression that describes the simple harmonic movement is
x = A cos (wt + Ф)
So that the penny should the surface when the system is going down the system must in faster than the acceleration of gravity, let's look for this acceleration
v = dx / dt
a = dv / dt = d²x / dt²
.a = - A w² cos (w t + Ф)
The maximum value of this acceleration is when the cosine value ±1
a = A w²
For the penny to leave the surface the limit acceleration is
a = g
g = A w²
w² = g/A
w = 2π f
g / A = 4 π² f²
f = 2ππ √g /A
For values greater than this frequency the penny separates from the surface in the downward movement
Answer:
Average acceleration of the car is 1.167 m/s^2
Explanation:
The speed of car with which it is travelling is 12 m/s
As the driver accelerates the car, the speed reaches 26 m/s
The change in speed in 12 seconds is
26 -12 = 14 m/s
Average acceleration is change in speed divided by time
m/s^2