Answer:
vrzjxuxuxjcckhcouvou
Explanation:
gghhjjokjjhghhrjxjxkyxygbjv
Answer:
Explanation:
mass of baseball, m = 0.148 kg
initial velocity, u = 15.5 m/s
final velocity, v = 10.1 m/s
Impulse is defined as the change in momentum of the body.
Impulse = change in momentum
I = m (v - u)
I = 0.148 (10.1 - 15.5)
I = - 0.8 Ns
Answer: The sound level of the singers is
86.96dB
Explanation:
sound wave can be described by the intensity of sound, which is measured in decibels. The actual intensity, in watts per square meter, varies over a very wide range, so the logarithmic scale is more convenient in intensity characterization. The intensity in decibels is given by 10log10 (I/Io)
Where Io= 10^-12W/m^2 is called the threshold of hearing.
If the intensity of sound produced by 1 singer is I the intensity of sound of 36 singers will be 36I
X = 10log10 (36I/ Io)
Transforming, we have,
X = 10log10 36 + 10log10(I/Io)
X = 10log10 36 + 71.4 fb
X = 15.56 + 71.4 fb
X = 86.96dB
Answer:
K = 4.43 10⁻¹⁸ J
Explanation:
The energy of the atoms on the surface of the sun is ‘
E = K + U
where the potential energy is given by
U = - k q² / r
the total energy is given by the thermal energy
E = k T
let's substitute in the first equation
k T = K - k e² / r
K = kT + k e2 / r
the constant are worth
k the Boltzmann constant k = 1,381 10-23 J / K
k the Coulomb cosntnate k = 8.99 109 N m2 / C2
e the charge of the electron e = 1.6 10-19 C
r the radius of the hydrogen atom r = 0.0529 10-9 m
let's calculate
K = 1.381 10⁻²³ 5500 + 8.99 10⁹ (1.6 10⁻¹⁹)² / 0.0529 10⁻⁹
K = 7.596 10⁻²⁰ + 4.35 10⁻¹⁸
K = 4.43 10⁻¹⁸ J
