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lesya [120]
3 years ago
11

In a _______ mixture, the ingredients are distributed evenly throughout the mixture, while in a _______ mixture, the ingredients

are unevenly distributed throughout.
Physics
1 answer:
mamaluj [8]3 years ago
7 0
In a homogeneous mixture, the ingredients are distributed evenly throughout the mixture, while in a heterogeneous mixture, the ingredients are unevenly distributed.
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Consider a sound wave moving through the air modeled with the equation s(x, t) = 5.00 nm cos(60.00 m−1x − 18.00 ✕ 103 s−1t). Wha
GaryK [48]

Answer:

Shortest time = 58.18 × 10^(-6) s

Explanation:

We are given;

s(x,t) = 5.00 nm cos((60.00 m^(−1)x) − (18.00 X 10³ s^(−1)t))

Let us set x = 0 as origin.

Now, for us to find the time difference, we need to solve 2 equations which are;

s(x,t) = 5.00 nm cos((60.00 m^(−1)x) − (18.00 X 10³ s^(−1)t1))

And

s(x,t) = 5.00 nm cos((60.00 m^(−1)x) − (18.00 X 10³ s^(−1)t2))

Now, since the wave starts from maxima at time at t = 0, the required time would be the difference (t2 - t1)

Thus, the solutions are;

t1 = (1/(18 × 10³)) cos^(-1) (2.5/5)

And

t2 = (1/(18 × 10³)) cos^(-1) (-2.5/5)

Angle of the cos function is in radians, thus;

t1 = 58.18 × 10^(-6) s

t2 = 116.36 × 10^(-6) s

So,

Required time = t2 - t1 = (116.36 × 10^(-6) s) - (58.18 × 10^(-6) s) = 58.18 × 10^(-6) s

4 0
3 years ago
On a fishing trip, Rebecca catches a fish that she has never seen before. What characteristics should she look at to determine w
LekaFEV [45]
She should look for the pattern on the skin
8 0
3 years ago
A box (m = 20 kg) is sliding on a horizontal surface. it is connected to a massless hook by a light string passing over a massle
Varvara68 [4.7K]

mass of the box = 20 kg

force of friction on the box due to surface

F_s = \mu_s N

F_s = 0.80 * 20 * 9.8

F_s = 156.8 N

similarly kinetic friction on it

F_k = \mu_k N

F_k = 0.30* 20 * 9.8

F_k = 58.8 N

now the weight of the suspended block will be

W = mg = 15*9.8 = 147 N

so here the weight of the suspended block is less than the limiting friction on it

So here we will say that friction will counter balance the weight of the suspended block and it will not move at all

So acceleration of the box will be zero

5 0
4 years ago
What kind of image is formed by a plane mirror
lisov135 [29]
A distorted image. :3

hope i help
5 0
4 years ago
The energy levels of one‑electron ions are given by the equation En=(−2.18×10−18 J)(Z^2/n^2) where Z is atomic number and n is t
Alexxandr [17]

Answer:

\lambda=4.86*10^{-7}m

Explanation:

Using the given equation, we calculate the energy associated with the excited state n_i=8 and n_f=4

E_n=\frac{-2.18*10^-18J(Z^2)}{n^2}

Helium has an atomic number (Z) equal to 2, for n=8:

E_8=\frac{-2.18*10^{-18}J(2^2)}{8^2}\\E_8=-1.36*10{-19}J

For n=4:

E_4=\frac{-2.18*10^{-18}J(2^2)}{4^2}\\E_4=-5.45*10{-19}J

When an electron jumps from an energy level with greater energy E_i to one with lower energy E_f the wavelength of the emitted photon is given by:

\lambda=\frac{hc}{E_i-E_f}

h is the Planck constant and c the speed of light in vaccum. So, we have:

\lambda=\frac{hc}{E_8-E_4}\\\lambda=\frac{6.63*10^{-34}J \cdot s(3*10^8\frac{m}{s})}{-1.36*10{-19}J-(-5.45*10{-19}J)}\\\lambda=4.86*10^{-7}m

5 0
3 years ago
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